diff --git a/2209040024/24 point game design b/2209040024/24 point game design
new file mode 100644
index 0000000..7570acc
--- /dev/null
+++ b/2209040024/24 point game design	
@@ -0,0 +1,127 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define SIZE 4  // 定义参与游戏的数字数量为4
+
+/* 表达式结构体
+ * value: 表达式的值
+ * expression: 表达式字符串
+ */
+typedef struct {
+	double value;
+	char expression[5 * (SIZE - 1) + SIZE * 2 + 1];  // 表达式字符串的长度为 5 * (SIZE - 1) + SIZE * 2 + 1
+} Exp;
+
+/* 处理24点游戏的函数
+ * 如果能得到结果为24的表达式，返回1，否则返回0
+ */
+int process24(Exp* exps, int size) {
+	Exp* stack = (Exp*) calloc(size - 1, sizeof(Exp));
+
+	/*
+	 * 当只有一个数字时，判断是否等于24
+	 */
+	if(size == 1) {
+		if(exps[0].value == 24) {
+			printf( "24 = %s\n", exps[0].expression  );
+			return 1;
+		} else {
+			return 0;
+		}
+	}
+
+	/*
+	 * 循环遍历所有可能的数字组合
+	 */
+	int m, n, i, t;
+	for (m = 0; m < size - 1; m++) {
+		for (n = m + 1; n < size; n++) {
+
+			/*
+			 * 构建一个新的数字数组，排除当前两个数字
+			 */
+			t = 0;
+			for (i = 0; i < size; i++) {
+				if (i != m && i != n) {
+					stack[t].value = exps[i].value;
+					sprintf(stack[t].expression, "%s", exps[i].expression);
+					t++;
+				}
+			}
+
+			/*
+			 * 尝试加法运算
+			 */
+			stack[size - 2].value = exps[m].value + exps[n].value;
+			sprintf(stack[size - 2].expression, "(%s + %s)", exps[m].expression, exps[n].expression);
+			if (process24(stack, size - 1)) {
+				return 1;
+			}
+
+			/*
+			 * 尝试减法运算
+			 */
+			if (exps[m].value > exps[n].value) {
+				stack[size - 2].value = exps[m].value - exps[n].value;
+				sprintf(stack[size - 2].expression, "(%s - %s)", exps[m].expression, exps[n].expression);
+			}
+			else {
+				stack[size - 2].value = exps[n].value - exps[m].value;
+				sprintf(stack[size - 2].expression, "(%s - %s)", exps[n].expression, exps[m].expression);
+			}
+			if (process24(stack, size - 1)) {
+				return 1;
+			}
+
+			/*
+			 * 尝试乘法运算
+			 */
+			stack[size - 2].value = exps[m].value * exps[n].value;
+			sprintf(stack[size - 2].expression, "%s * %s", exps[m].expression, exps[n].expression);
+			if (process24(stack, size - 1)) {
+				return 1;
+			}
+
+			/*
+			 * 尝试除法运算
+			 */
+			if (exps[m].value != 0) {
+				stack[size - 2].value = exps[n].value / exps[m].value;
+				sprintf(stack[size - 2].expression, "%s / %s", exps[n].expression, exps[m].expression);
+				if (process24(stack, size - 1)) {
+					return 1;
+				}
+			}
+			if (exps[n].value != 0) {
+				stack[size - 2].value = exps[m].value / exps[n].value;
+				sprintf(stack[size - 2].expression, "%s / %s", exps[m].expression, exps[n].expression);
+				if (process24(stack, size - 1)) {
+					return 1;
+				}
+			}
+		}
+	}
+
+	return 0;  // 无法找到24的组合，返回0
+}
+
+int main(void) {
+	int i, number;
+	Exp exps[SIZE];
+
+	// 输入4个数字并保存在exps数组中
+	for (i = 0; i < SIZE; i++) {
+		scanf("%d", &number);
+		exps[i].value = (double) number;
+		sprintf(exps[i].expression, "%d", number);
+	}
+
+	// 调用处理24点游戏的函数
+	if (process24(exps, SIZE)) {
+		printf("Done\n");
+	} else {
+		printf("No answer, try another 4 numbers.\n");
+	}
+
+	return 0;
+}
diff --git a/2209040024/Design of Book Information Management System b/2209040024/Design of Book Information Management System
new file mode 100644
index 0000000..df9f75f
--- /dev/null
+++ b/2209040024/Design of Book Information Management System	
@@ -0,0 +1,1555 @@
+
+/*头文件区*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <conio.h>
+
+/*宏定义区*/ 
+#define  ADMIN_password "123456" /*管理员登录密码*/
+
+/*结构体声明区*/
+typedef struct bookinfo/*系统图书信息 */ 
+{
+    char number[15];/*图书编号*/
+    char name[30];/*图书名称*/
+    char author[20];/*作者*/
+    char press[30];/*出版社*/ 
+    char category[20]; /*类别*/ 
+    float price;/*单价*/ 
+    int  quantity;/*馆藏量*/
+ 	int  time;/*借书次数*/ 
+}BOOKINFO;
+
+typedef struct bookgrasp/*会员借出的书籍信息*/ 
+{
+	char number[15];/*图书编号*/
+    char name[30];/*图书名称*/
+    char author[20];/*作者*/
+    char press[30];/*出版社*/ 
+    char category[20]; /*类别*/ 
+    float price;/*单价*/ 
+ 	char account[30];/*借书者ID*/
+}BOOKGRASP;
+
+typedef struct member/*会员个人信息 */ 
+{ 
+	char name[30];
+	char ID[20];
+	char password[30];
+	char sex[15];	
+	char password_key[30];
+}MEMBER; 
+
+/*菜单函数区*/
+void menu1();
+void menu2();
+void menu3();
+void AboutMe();
+
+/*工具函数区*/
+int compare_password(char password[20]);/*密码比对函数 */  
+void clock_delay(); /*时间延时函数*/ 
+void password_circle();/*密码框装饰函数*/
+void find_account_circle();/*找回帐户弹出框函数*/ 
+
+/*会员信息系统层级函数区*/
+int user_account(char account[20]);/*个人账户信息*/ 
+void member_log_up();/*会员注册函数*/
+int member_log_in(char account[20]);/*会员登录函数*/ 
+void ADMIN_watch_member();/*查看会员信息函数*/
+void display_memberbook();/*查看所有图书借阅信息函数*/
+int check_repeat_ID(char id_account[20]);/*检查账户重复性函数*/ 
+void find_account();/*账户找回函数*/ 
+
+/*图书信息系统层级函数区*/
+void add_book();/*输入新进的图书信息*/
+void delete_book();/*根据图书名称对图书信息进行删除*/
+void modify_book();/*修改图书信息*/
+void display_book();/*显示全部图书信息*/
+void search_book();/*根据图书名称显示图书的信息*/
+void borrow_book(char account[20]);/*借书*/
+void return_book(char account[20]);/*还书*/
+void display_price_lower();/*根据价格列出图书信息*/
+void dispaly_popular();/*图书受欢迎度排行榜*/
+int check_repeat_book(char number[30]);/*查重书籍编号*/
+
+int main()
+{
+	int flag1=1,flag2=1,flag3=1;/* flag是判断条件,flag为 1 时为真，为 0 时为假 */
+	char choice1,choice2,choice3;
+	FILE *p1,*p2,*p3;
+	
+	system("图书管理系统");
+   
+    if((p1=fopen("library.txt","r"))==NULL)/*p1是图书管理系统的书籍信息文件指针*/ 
+    {
+      	p1=fopen("library.txt","w");
+      	fclose(p1);
+    }
+	if((p2=fopen("infomember.txt","r"))==NULL)/*p2是图书管理系统的会员个人信息文件指针*/ 
+	{
+		p2=fopen("infomember.txt","w");
+		fclose(p2);
+	}
+	if( (p3=fopen("memberbook.txt","r"))==NULL)/*p3是图书管理系统的会员书籍信息文件指针*/ 
+	{
+		p3=fopen("memberbook.txt","w");
+		fclose(p3);
+	}
+	
+	while(flag1)
+	{
+		system("cls");
+		menu1();/*调出主菜单 */ 
+
+  		printf("\n");
+  		printf("请您选择(1-4):");
+  		choice1=getch();
+  		while(choice1!='1'&&choice1!='2'&&choice1!='3'&&choice1!='4')
+  			choice1=getch();
+  		printf("%c",choice1);
+  		fflush(stdin);
+
+  		if(choice1=='1')/*会员登录*/ 
+		{
+			int flag=0;
+			char account1[20],account_choice;
+			system("cls");
+			password_circle();
+			fflush(stdin);
+			gets(account1);
+			flag=member_log_in(account1);/*账户登录函数*/ 
+			if(flag==2)
+			{
+				system("cls");
+				password_circle();
+				fflush(stdin);
+				gets(account1);
+				flag=member_log_in(account1);/*账户登录函数*/	
+			} 
+			if(flag==1)
+			{
+    		while(flag2&&flag3){
+    		system("cls");
+			menu2();
+    		printf("\n");
+    		printf("请您选择(1-8):");
+    		choice2=getch();
+    		while(choice2!='1'&&choice2!='2'&&choice2!='3'&&choice2!='4'&&choice2!='5'&&choice2!='6'&&choice2!='7'&&choice2!='8')
+  				choice2=getch();
+  			printf("%c",choice2);
+
+   			switch(choice2)
+    		{
+    			case '1':search_book(); break;
+    			case '2':borrow_book(account1); break;
+    			case '3':return_book(account1); break;
+    			case '4':display_book(); break;
+    			case '5':display_price_lower();break;
+    			case '6':dispaly_popular();break; 
+    			case '7':if(user_account(account1))
+    						{
+								printf("\n\n\t\t\t登录信息改变，请重新登录...");
+       		       	  	 		clock_delay();
+       		       	  	 		flag3=0;
+							}
+						 break;
+    			case '8':flag2=0;
+					     printf("\n\n\t\t\t正在退出用户界面...");
+       		       	  	 clock_delay();
+						 break;
+				default:break;/*虽然压根不会读到default情况，但是怕后来开发者漏掉新加的case的while处理，所以加上*/
+    				}
+				}
+			}else{
+				system("cls"); 
+				find_account_circle();/*装饰弹出框函数*/ 
+				fflush(stdin);
+				account_choice=getch();
+				while(account_choice!='Y'&&account_choice!='y'&&account_choice!='N'&&account_choice!='n')
+      	    		account_choice=getch();
+      			printf("%c",account_choice);
+				printf("\n");
+				if(account_choice=='Y'||account_choice=='y')
+					find_account();/*账户找回函数*/ 	
+			}
+			flag2=1,flag3=1;
+		}
+	
+		else if(choice1=='2')/*会员注册*/ 
+		{
+			system("cls");
+			printf("\n\n\n\t\t\t正在进入用户注册界面...");
+			clock_delay();
+     	   member_log_up();  
+		}
+	 
+		else if(choice1=='3')/*管理员登录*/ 
+		{
+			if(compare_password(ADMIN_password))
+			{
+				printf("\n\n\t\t\t\t  --输入密码正确!--\n\n\t\t\t\t==正在进入管理员界面==\n");
+     	  	 	clock_delay(); 
+				while(flag2){
+				system("cls");
+				menu3();
+				printf("\n");
+				printf("请您选择(1-8):");
+				choice3=getch();
+				while(choice3!='1'&&choice3!='2'&&choice3!='3'&&choice3!='4'&&choice3!='5'&&choice3!='6'&&choice3!='7'&&choice3!='8')
+  					choice3=getch();
+  				printf("%c",choice3);
+		
+ 				switch(choice3)
+				{
+					case '1':add_book(); break;
+					case '2':delete_book(); break;
+   					case '3':modify_book(); break;
+   					case '4':search_book(); break;
+   					case '5':display_book(); break;
+   					case '6':ADMIN_watch_member();break; 
+   					case '7':display_memberbook();break;
+   					case '8':flag2=0;
+					     	 printf("\n\n\t\t\t正在退出管理员界面...");
+         	     	  		 clock_delay();
+							 break;
+   					default:break;/*虽然压根不会读到default情况，但是怕后来开发者漏掉新加的case的while处理，所以加上*/
+   					}
+  				}
+  			} 
+  			else{
+  				printf("\n\n\t\t\t\t  --输入密码错误!--\n");
+     		   	clock_delay();
+			}
+			flag2=1; 
+ 		}
+ 	
+ 		else if(choice1=='4')/*退出系统*/
+ 		{
+ 			flag1=0;
+		}
+	}
+	fflush(stdin);
+	system("cls");
+	printf("你已经安全退出系统!(按任意键关闭界面)\n\n\t欢迎您的再次使用!\n\n");
+	getch();
+	return 0;
+}
+
+void menu1()
+{
+	system("color E9");
+	printf("\n\n");
+	printf("\t\t\t *=======================================*\n");
+	printf("\t\t\t|  * - * - * 图*书*管*理*系*统 * - * - *  |\n");
+	printf("\t\t\t| *                                     * |\n");
+	printf("\t\t\t| |  [1]   会员登录                     | |\n");
+	printf("\t\t\t| *                                     * |\n");
+	printf("\t\t\t| |  [2]   会员注册                     | |\n");
+	printf("\t\t\t| *                                     * |\n");
+	printf("\t\t\t| |  [3]   管理员登录                   | |\n");
+	printf("\t\t\t| *                                     * |\n");
+	printf("\t\t\t| |  [4]   退出系统                     | |\n");
+	printf("\t\t\t| *                                     * |\n");
+	printf("\t\t\t|  * - * - * - * - * - * - * - * - * - *  |\n");
+	printf("\t\t\t *=======================================*\n");
+}
+void menu2()
+{
+	system("color BC");
+	printf("\n\n");
+	printf("\t\t\t *=====================================*\n");
+    printf("\t\t\t| | * - * - * -会-员-界-面- * - * - * | |\n");
+    printf("\t\t\t| *                                   * |\n");
+    printf("\t\t\t| |  [1]   查找图书信息               | |\n");
+    printf("\t\t\t| *  [2]   借阅图书                   * |\n");
+    printf("\t\t\t| |  [3]   归还图书                   | |\n");
+    printf("\t\t\t| *  [4]   书库所有图书信息           * |\n");
+    printf("\t\t\t| |  [5]   价位书籍推荐               | |\n");
+    printf("\t\t\t| *  [6]   图书受欢迎度排行榜         * |\n");
+    printf("\t\t\t| |  [7]   您的账户信息               | |\n");
+    printf("\t\t\t| *  [8]   退出用户界面               * |\n");
+    printf("\t\t\t| |                                   | |\n");
+    printf("\t\t\t| * - * - * - * - * - * - * - * - * - * |\n");
+	printf("\t\t\t *=====================================*\n");
+}
+void menu3()
+{
+	system("color 1D");
+	printf("\n\n");
+	printf("\t\t\t *======================================*\n");
+	printf("\t\t\t| | * - * - * 管-理-员-界-面 * - * - * | |\n");
+	printf("\t\t\t| *                                    * |\n");
+	printf("\t\t\t| |  [1]   添加图书                    | |\n");
+	printf("\t\t\t| *  [2]   删减图书                    * |\n");
+	printf("\t\t\t| |  [3]   修改图书信息                | |\n");
+	printf("\t\t\t| *  [4]   查找图书信息                * |\n");
+	printf("\t\t\t| |  [5]   显示全部图书信息            | |\n");
+	printf("\t\t\t| *  [6]   显示所有会员信息            * |\n");
+	printf("\t\t\t| |  [7]   显示所有借阅信息            | |\n");
+	printf("\t\t\t| *  [8]   退出管理员界面              * |\n");
+	printf("\t\t\t| |                                    | |\n");
+	printf("\t\t\t| * - * - * - * - * -- * - * - * - * - * |\n");
+	printf("\t\t\t *======================================*\n");
+}
+
+
+void add_book() /*输入新进的图书信息*/
+{
+    char choice;
+    FILE *p1;
+    BOOKINFO newbook;
+    int flag;
+    system("cls");
+    while(1)
+      	{
+      	flag=0; 
+      	fflush(stdin);
+		printf("请输入图书编号:");
+		gets(newbook.number);
+		
+		if(check_repeat_book(newbook.number))
+		{	
+			printf("该图书编号已被使用！");
+			printf("\n按任意键重新注册\n\n");
+			getch();
+			flag=1; 
+		}
+		else{
+			fflush(stdin); 
+			printf("请输入书名:");
+			gets(newbook.name);
+		
+			printf("请输入作者:");
+			gets(newbook.author);
+		
+			printf("请输入出版社:");
+			gets(newbook.press);
+			
+			printf("请输入类别(文学/科学/理学/工学/等):");
+			gets(newbook.category);
+		
+			printf("请输入价格:");
+			scanf("%f",&newbook.price);
+		
+			printf("请输入馆藏量:");
+			scanf("%d",&newbook.quantity);
+		
+			printf("请输入借阅次数(新书输入0):");
+			scanf("%d",&newbook.time); 
+		fflush(stdin);
+      	printf("是否保存该条书目(y/n):");
+      	choice=getch();
+		while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    choice=getch();
+      	printf("%c",choice);
+     	if(choice=='Y'||choice=='y')
+        {
+        	p1=fopen("library.txt","a");
+	        fprintf(p1,"%s %s %s %s %s %f %d %d\n",
+					newbook.number,newbook.name,newbook.author,newbook.press,
+					newbook.category,newbook.price,newbook.quantity,newbook.time);
+	        fclose(p1);
+        	printf("\n该条书目已添加到library.txt文件中!\n");
+       	}
+        else
+        {
+       		printf("\n本条书目未保存!\n");
+        }
+      	printf("\n\n是否继续添加书目(y/n):");
+        choice=getch();
+        while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    choice=getch();
+      	printf("%c",choice);
+      	printf("\n");
+      	} 
+     	if(choice=='Y'||choice=='y'||flag==1)
+        	continue;
+      	else
+       	 	break;
+      }
+}
+
+void display_book()/*显示全部图书信息*/
+{
+    FILE *p1;
+    int n;
+    BOOKINFO bookinfo[100];
+    int booknumber=0;
+    system("cls");
+    fflush(stdin);
+    p1=fopen("library.txt","r");
+    while(!feof(p1))
+    {
+      	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+      	booknumber++;
+    }
+    fclose(p1);
+    printf("当前图书馆内有%d目书籍\n\n",booknumber);
+    if(bookinfo[0].quantity==0)
+    {
+      	printf("\n没有任何图书信息!\n\n");
+    }
+    else
+    {
+      	n=0;
+      	printf("|---------------------------------图书信息---------------------------------|\n");
+      	printf("|编号  书名        作者      出版社          类别    单价    馆藏量  借阅数|\n");
+      	printf("|                                                                          |\n");
+      	while(n<booknumber)
+        {
+        	printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f%-8d%-6d|\n",bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+                        bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+        	n++;
+        }
+      }
+    printf("\n\n按任意键返回上一级菜单!\n");
+   	getch();
+}
+
+void search_book()/*根据图书名称显示图书的信息*/
+{
+	int flag=1,flag1=1;
+	char select;
+    char name_compare[30]="";/*name_compare用来存放要查询的书名*/
+   	char number_compare[30]=""; /*number_compare用来存放要查询的书籍编号*/
+   	char author_compare[30]="";/*author_compare用来存放要查询的作者姓名*/
+	char search[30]="";/*search是比对数组,将需要查找的数组读进比对数组*/
+	char compare[30]="";/*compare是比对数组,将书库中的数组读进比对数组*/
+    int n=0;
+    FILE *p1;
+    char choice;
+    BOOKINFO bookinfo[100];
+    int booknumber=0;
+
+    system("cls");
+    fflush(stdin);
+    p1=fopen("library.txt","r");
+    while(!feof(p1))
+    {
+      	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+      	booknumber++;
+    }
+    fclose(p1);
+
+	while(flag)
+    {
+		system("cls");
+    	while(flag1)
+		{
+			system("cls");
+			fflush(stdin);
+			printf("您想通过\n\n1.<-图书编号->\n\n2.<-书名->\n\n3.<-作者名->\n\n哪种方式查询图书:");
+    		select=getch();
+    		printf("%c",select);
+			printf("\n\n请您输入查找信息:");		
+			switch(select)
+			{
+				case '1':gets(number_compare);strcpy(search,number_compare);flag1=0;break;
+				case '2':gets(name_compare);strcpy(search,name_compare);flag1=0;break;
+				case '3':gets(author_compare);strcpy(search,author_compare);flag1=0;break;
+				default :
+					printf("\n不要输入菜单之外的数字~按任意键继续！");
+					fflush(stdin);
+            	    getch(); 
+			}
+		}
+
+	flag1=1;
+    if(bookinfo[0].quantity==0)
+    {
+      	printf("书库中没有任何信息!\n\n");
+      	printf("按任意键回到主菜单!\n\n");
+      	getch();
+      	break;
+    }
+    else
+    {
+     	for(n=0;n<booknumber;n++)
+      	{
+      		switch(select)
+      		{
+      			case '1':strcpy(compare,bookinfo[n].number);break;
+      			case '2':strcpy(compare,bookinfo[n].name);break;
+      			case '3':strcpy(compare,bookinfo[n].author);break;
+			}
+        	if(strcmp(compare,search)==0)
+          	{
+         		printf("|---------------------------------图书信息---------------------------------|\n");
+      			printf("|编号  书名        作者      出版社          类别    单价    馆藏量  借阅数|\n");
+      			printf("|                                                                          |\n");
+    			printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f%-8d%-6d|\n",bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+                        bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+       			break;
+			}
+       	}
+   			if(n>=booknumber)
+       		printf("\n没有查找符合您要求的书籍!\n");
+       		
+      		printf("\n\n是否继续查询(y/n):");
+      		choice=getch();
+     		while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    	choice=getch();
+      		printf("%c",choice);
+      		printf("\n");
+      		if(choice=='Y'||choice=='y')
+       			flag=1;
+      		else
+      			flag=0;
+       		
+       }
+	}
+}
+
+void delete_book()/*根据图书名称对图书信息进行删除*/
+{
+    char search[20]="";/*search用来存放要删除的书名*/
+    int n,i;
+    FILE *p1;
+    char choice;
+    BOOKINFO bookinfo[100];
+    int booknumber;
+
+    system("cls");
+    while(1)
+    {
+    	fflush(stdin);
+        printf("输入要删除的书本名称:");
+      	gets(search);
+     	p1=fopen("library.txt","r");
+      	booknumber=0;
+      	while(!feof(p1))
+        {
+        	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+        	booknumber++;
+        }
+     	fclose(p1);
+      	if(bookinfo[0].quantity==0)
+        {
+        	printf("书库中没有任何信息!\n\n");
+        	printf("按任意键回到主菜单!\n\n");
+        	getch();
+        	break;
+        }/*if结束*/
+        else
+        {
+        	for(n=0;n<booknumber;n++)
+            if(strcmp(bookinfo[n].name,search)==0)
+            {
+           		break;
+            }
+        	if(n>=booknumber)
+          		printf("\n没有查找该书的任何信息!\n");
+        	else
+            {
+           		printf("\n是否确认需要删除该条书目(Y/N):");
+           		choice=getch();
+             	while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    		choice=getch();
+      			printf("%c",choice);
+           		if(choice=='Y'||choice=='y')
+             	{
+             		for(i=n;i<booknumber-1;i++)
+               			bookinfo[i]=bookinfo[i+1];
+             		booknumber--;
+           			p1=fopen("library.txt","w");
+                	for(n=0;n<booknumber;n++)
+               		fprintf(p1,"%s %s %s %s %s %f %d %d\n",
+						bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+						bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+             		fclose(p1);
+           			printf("\n删除成功!");
+             	}
+           		else
+              		printf("\n该条书目没有被删除!");
+           }
+            printf("\n\n是否继续进行删除操作(y/n):");
+         		choice=getch();
+         	while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	   		choice=getch();
+      		printf("%c",choice);
+      		printf("\n");
+         	if(choice=='Y'||choice=='y')
+           		continue;
+         	else
+           		break;
+        }/*else结束*/
+      }/*while(1)结束*/
+    }
+
+void display_price_lower()/*根据价格列出图书信息*/
+{
+    float price;
+    FILE *p1;
+    int n;
+    int count=0;
+    BOOKINFO bookinfo[100];
+    int booknumber;
+
+    system("cls");
+    printf("请输入你的理想价格,我们将推荐比您理想价位稍低的书籍:");
+    scanf("%f",&price);
+    p1=fopen("library.txt","r");
+    booknumber=0;
+    while(!feof(p1))
+    {
+      	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+      	booknumber++;
+    }
+    fclose(p1);
+    if(bookinfo[0].quantity==0)
+    {
+      	printf("\n没有任何图书信息!\n");
+    }
+    else
+    {
+      	for(n=0;n<booknumber;n++)
+        {
+        	if(bookinfo[n].price<=price)
+          	count++;
+        }
+      	if(count==0)
+       		printf("书库中没有比%.1f元价格更低的图书。",price);
+      	else
+        {
+        	printf("\n价格低于%.1f元的图书信息有%d本\n",price,count);
+       		printf("|---------------------------------图书信息---------------------------------|\n");
+      		printf("|编号  书名        作者      出版社          类别    单价    馆藏量  借阅数|\n");
+      		printf("|                                                                          |\n");
+        	for(n=0;n<booknumber;n++)
+          	{
+          		if(bookinfo[n].price<=price)
+            	printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f%-8d%-6d|\n",bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+                        bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+          	}
+        }
+      }
+    printf("\n\n按任意键回到主菜单!\n");
+    getch();
+    }
+
+void modify_book()
+{
+	int flag=1,flag1=1,flag2,n;
+	char change,choice;
+	char number[15];/*图书编号*/
+    char name[30];/*图书名称*/
+    char author[20];/*作者*/
+   	char press[30];/*出版社*/
+	char category[20];/*类别*/ 
+    int  quantity;/*藏书量*/
+    float price;/*单价*/
+    
+	char search[30];/*要修改的书名*/ 
+	FILE *p1;
+	BOOKINFO bookinfo[100];
+	int booknumber;
+    while(flag)
+    {
+    	flag2=0;
+    	system("cls");
+    	fflush(stdin);
+      	printf("输入要修改信息的书本名:");
+      	gets(search);
+      	p1=fopen("library.txt","r");
+      	booknumber=0;
+      	while(!feof(p1))
+        {
+        	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+        	booknumber++;
+        }
+      	fclose(p1);
+      	if(bookinfo[0].quantity==0)
+        {
+        	printf("书库中没有任何信息!\n\n");
+        	printf("按任意键回到主菜单!\n\n");
+        	getch();
+        	break;
+        }
+        else
+        {
+        	for(n=0;n<booknumber;n++)
+         		if(strcmp(bookinfo[n].name,search)==0)
+            	{
+            		printf("\n"); 
+         			printf("|---------------------------------图书信息---------------------------------|\n");
+      				printf("|编号  书名        作者      出版社          类别    单价    馆藏量  借阅数|\n");
+      				printf("|                                                                          |\n");
+    				printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f%-8d%-6d|\n",bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+                     	   bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+       				
+					while(flag1){
+					printf("\n1.书籍编号\n2.书籍名称\n3.书籍作者\n4.出版社\n5.书籍类别\n6.书籍单价\n7.藏书量\n\n您想要修改的是:");
+					change=getch();
+					while(change!='1'&&change!='2'&&change!='3'&&change!='4'&&change!='5'&&change!='6'&&change!='7')
+  						change=getch();
+  					printf("%c",change);
+           			printf("\n请输入新的字条:");
+           			fflush(stdin);
+            		switch(change)
+            		{
+            			case '1':gets(number);flag1=0;flag2=check_repeat_book(number);
+									if(!flag2)
+										strcpy(bookinfo[n].number,number);
+								break;
+            			case '2':gets(name);strcpy(bookinfo[n].name,name);flag1=0;break;
+            			case '3':gets(author);strcpy(bookinfo[n].author,author);flag1=0;break;
+            			case '4':gets(press);strcpy(bookinfo[n].press,press);flag1=0;break;
+            			case '5':gets(category);strcpy(bookinfo[n].category,category);flag1=0;break;
+            			case '6':scanf("%f",&price);bookinfo[n].price=price;flag1=0;break;
+            			case '7':scanf("%d",&quantity);bookinfo[n].quantity=quantity;flag1=0;break;
+            			default:break;/*虽然压根不会读到default情况，但是怕后来开发者漏掉新加的case的while处理，所以加上*/
+					}
+				}
+			flag1=1;
+            break;
+            }
+        if(n>=booknumber)
+           printf("\n没有查找该书的任何信息!");
+        else if(!flag2)
+        {
+            p1=fopen("library.txt","w");
+            for(n=0;n<booknumber;n++)
+            fprintf(p1,"%s %s %s %s %s %f %d %d\n",
+					bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+					bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+            fclose(p1);
+            printf("\n修改成功!");
+        }
+        else
+        	printf("您想修改的图书信息与馆内信息重复。"); 
+   		printf("\n是否继续进行修改(y/n):");
+        choice=getch();
+        while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    choice=getch();
+      	printf("%c",choice);
+      	printf("\n");
+        if(choice=='Y'||choice=='y')
+            flag=1;
+        else
+            flag=0;
+    	}
+	}
+}
+
+void borrow_book(char account[20])
+{
+	FILE *p1,*p3;
+	BOOKINFO bookinfo[100];
+	char search[30],choice;
+	int flag=1,n;
+	int booknumber1;
+	system("cls");
+
+    while(flag)
+    {
+      	printf("输入要借阅的书本名:");
+      	gets(search);
+      	p1=fopen("library.txt","r");
+      	booknumber1=0;
+      	while(!feof(p1))
+        {
+        	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber1].number,bookinfo[booknumber1].name,bookinfo[booknumber1].author,
+				bookinfo[booknumber1].press,bookinfo[booknumber1].category,
+				&bookinfo[booknumber1].price,&bookinfo[booknumber1].quantity,&bookinfo[booknumber1].time);
+        	booknumber1++;
+        }
+      	fclose(p1);
+	
+      	if(bookinfo[0].quantity==0)
+        {
+        	printf("\n书库中没有任何信息!\n");
+        	printf("按任意键回到主菜单!\n\n");
+        	getch();
+        	break;
+        }
+        else
+        {
+        	for(n=0;n<booknumber1;n++)
+         		if(strcmp(bookinfo[n].name,search)==0)
+            	{
+					bookinfo[n].quantity--;
+					bookinfo[n].time++;
+					
+					p3=fopen("memberbook.txt","a");  /*借书以a追加的方式，在文件中增加一本书*/ 
+					fprintf(p1,"%s %s %s %s %s %f %s\n",
+							bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,bookinfo[n].press,
+							bookinfo[n].category,bookinfo[n].price,account);
+					fclose(p3); 
+					break;
+				}
+            }
+        if(n>=booknumber1)
+           printf("\n没有查找该书的任何信息!\n");
+        else
+        {
+            p1=fopen("library.txt","w");
+            for(n=0;n<booknumber1;n++)
+            fprintf(p1,"%s %s %s %s %s %f %d %d\n",
+					bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,bookinfo[n].press,
+					bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+            fclose(p1);
+            printf("\n借书成功!\n");
+        }
+   		printf("\n是否继续借书(y/n):");
+        choice=getch();
+        while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    choice=getch();
+      	printf("%c",choice);
+      	printf("\n");
+        if(choice=='Y'||choice=='y')
+            flag=1;
+        else
+            flag=0;
+    }
+}
+
+void return_book(char account[20])
+{
+	FILE *p1,*p3;
+	BOOKINFO bookinfo[100];
+	BOOKGRASP bookgrasp[100];
+	char search[30],choice;
+	int flag=1,flag2=0,n,i,k,j,t=0;
+	int booknumber,booknumber2;
+	system("cls");
+	
+    while(flag)
+    {
+    	flag2=0;
+    	fflush(stdin);
+      	p1=fopen("library.txt","r");
+      	booknumber=0;
+      	while(!feof(p1))
+        {
+        	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+        	booknumber++;
+        }
+      	fclose(p1);
+      	
+    	p3=fopen("memberbook.txt","r");
+		booknumber2=0;
+		while(!feof(p3))
+		{
+			fscanf(p3,"%s %s %s %s %s %f %s\n",
+					bookgrasp[booknumber2].number,bookgrasp[booknumber2].name,bookgrasp[booknumber2].author,bookgrasp[booknumber2].press,
+					bookgrasp[booknumber2].category,&bookgrasp[booknumber2].price,bookgrasp[booknumber2].account);
+			booknumber2++;
+		}
+		fclose(p3);				
+      	
+		printf("您所借阅的所有图书信息如下:\n"); 
+        printf("|----------------------------图书借阅信息--------------------|\n");
+      	printf("|编号  书名        作者      出版社          类别    单价    |\n");
+        while(t<booknumber2)
+       	{
+        	if(strcmp(bookgrasp[t].account,account)==0)
+        	{
+				printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f|\n",bookgrasp[t].number,
+						bookgrasp[t].name,bookgrasp[t].author,bookgrasp[t].press,
+						bookgrasp[t].category,bookgrasp[t].price);
+			}
+        	t++;
+        }
+      	
+      	printf("\n输入要归还的书本名:");
+      	gets(search);
+      	if(bookinfo[0].quantity==0)
+        {
+        	printf("\n书库中没有任何信息!\n");
+        	printf("按任意键回到主菜单!\n\n");
+        	getch();
+        	break;
+        }
+        else
+        {
+        	for(n=0;n<booknumber;n++)
+         		if(strcmp(bookinfo[n].name,search)==0)
+            	{
+						bookinfo[n].quantity++;
+
+						if(bookgrasp[0].price==0)
+							printf("\n您没有借书信息。");
+						else{
+						for(k=0;k<booknumber2;k++)
+							if(!strcmp(bookgrasp[k].account,account)&&!strcmp(bookgrasp[k].name,search))
+							{
+								flag2=1;
+								for(i=k;i<booknumber2-1;i++)
+               						bookgrasp[i]=bookgrasp[i+1];
+               					booknumber2--;
+               					break;
+               				}
+               			
+						p3=fopen("memberbook.txt","w");
+						for(j=0;j<booknumber2;j++)
+						{
+							fprintf(p3,"%s %s %s %s %s %f %s\n",
+								bookgrasp[j].number,bookgrasp[j].name,bookgrasp[j].author,bookgrasp[j].press,
+								bookgrasp[j].category,bookgrasp[j].price,bookgrasp[j].account);
+						}
+						fclose(p3);
+						}
+						break;
+					}
+				} 
+        if(n==booknumber||flag2==0)
+        	printf("您并没有这条借阅信息!\n"); 
+        if(n<booknumber&&flag2==1)
+        {
+            p1=fopen("library.txt","w");
+            for(n=0;n<booknumber;n++)
+            fprintf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+				bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+            fclose(p1); 
+            printf("\n还书成功！");
+        }
+        else
+        	printf("\n还书失败！");
+        
+		fflush(stdin);	
+   		printf("\n是否继续还书(y/n):");
+        choice=getch();
+        while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    choice=getch();
+      	printf("%c",choice);
+      	printf("\n");
+        if(choice=='Y'||choice=='y')
+            flag=1;
+        else
+            flag=0;
+	}
+}
+
+void dispaly_popular()/*图书受欢迎度排行榜*/ 
+{
+    FILE *p1;
+    int n,i,j,k;
+    int count=0;
+    BOOKINFO bookinfo[101];
+    int booknumber;
+    
+    system("cls");
+    fflush(stdin);
+    p1=fopen("library.txt","r");
+    booknumber=0;
+    while(!feof(p1))
+    {
+      	fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+      	booknumber++;
+    }
+    fclose(p1);
+    
+    if(bookinfo[0].quantity==0)
+    {
+      	printf("没有任何图书信息!\n\n");
+    }
+    else
+    {
+      	for(i=0;i<booknumber-1;i++)
+      	{
+      		k=i;
+      		for(j=i+1;j<booknumber;j++)
+      			if(bookinfo[j].time>bookinfo[k].time)
+      				k=j;
+      		if(k!=i)
+      		{
+      			bookinfo[100]=bookinfo[i];
+      			bookinfo[i]=bookinfo[k];
+      			bookinfo[k]=bookinfo[100];
+      		}
+      	}
+        	
+       		printf("|---------------------------图书受欢迎度排行榜-----------------------------|\n");
+      		printf("|编号  书名        作者      出版社          类别    单价    馆藏量  借阅数|\n");
+      		printf("|                                                                          |\n");
+        	for(n=0;n<booknumber;n++)
+          	{
+            	printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f%-8d%-6d|\n",bookinfo[n].number,bookinfo[n].name,bookinfo[n].author,
+                        bookinfo[n].press,bookinfo[n].category,bookinfo[n].price,bookinfo[n].quantity,bookinfo[n].time);
+          	}
+        
+      }
+    printf("\n\n按任意键回到主菜单!\n");
+    getch();
+}
+
+int check_repeat_book(char number[30])
+{
+	FILE *p1;
+	BOOKINFO bookinfo[100];
+	int flag1=0,flag2=1,n,booknumber;
+	
+    p1=fopen("library.txt","r");
+   	booknumber=0;
+    while(!feof(p1))
+    {
+        fscanf(p1,"%s %s %s %s %s %f %d %d\n",
+				bookinfo[booknumber].number,bookinfo[booknumber].name,bookinfo[booknumber].author,
+				bookinfo[booknumber].press,bookinfo[booknumber].category,
+				&bookinfo[booknumber].price,&bookinfo[booknumber].quantity,&bookinfo[booknumber].time);
+       	booknumber++;
+    }
+    fclose(p1);
+	for(n=0;n<booknumber;n++)
+    	if(strcmp(bookinfo[n].number,number)==0)
+    	{
+    	    flag1=1;
+			break;
+		}
+		if(flag1)
+		{
+			return 1;
+   		}
+   		else{
+            return 0;
+		}
+}
+
+void member_log_up()
+{
+	char choice1,choice2;
+	int flag=1; 
+	FILE *p2;
+	MEMBER member;
+	
+	while(1)
+	{
+		system("cls");
+		fflush(stdin);
+	
+		printf("输入您想注册的ID名:");
+		gets(member.ID);
+		
+		if(check_repeat_ID(member.ID))
+		{	
+			printf("该ID已被注册！请重新注册^_^\n");
+			printf("按任意键重新注册\n\n");
+			getch();
+			flag=1; 
+		}
+		else{
+			flag=0;
+			printf("输入您的密码(不要告知他人):");
+			gets(member.password);
+			
+			printf("输入找回密码的密钥(以免忘记账户或密码不能登陆！):"); 
+			gets(member.password_key); 
+			
+			printf("输入您的姓名:");
+			gets(member.name);
+	
+			printf("输入您的性别(男士输入male,女士输入female):");
+			gets(member.sex);
+	
+			printf("是否保存这次注册信息(y/n):");
+    		choice1=getch();
+    		while(choice1!='Y'&&choice1!='y'&&choice1!='N'&&choice1!='n')
+      	    	choice1=getch();
+      	    printf("%c",choice1);
+ 			printf("\n");
+   	 	if(choice1=='Y'||choice1=='y')
+    	{
+        	p2=fopen("infomember.txt","a");
+	    	fprintf(p2,"%s %s %s %s %s\n",member.ID,member.password,
+					member.password_key,member.name,member.sex);
+	    	fclose(p2);
+			printf("\n您的账户已注册成功！\n");
+    	}
+    	else
+    	{
+       		printf("\n您的注册信息未保存!\n");
+    	}
+    	printf("\n是否继续注册会员(y/n):");
+        choice2=getch();
+        while(choice2!='Y'&&choice2!='y'&&choice2!='N'&&choice2!='n')
+      	    choice2=getch();
+      	printf("%c",choice2);
+      	printf("\n");
+    	}
+     	if(choice2=='Y'||choice2=='y'||flag==1)
+        	continue;
+      	else
+       	 	break;
+	}
+}
+
+int user_account(char account[20])
+{
+	FILE *p2,*p3;
+	int n,number,booknumber,flag=0,i,flag2=1,count=0;
+	char new_password[20],key[30],choice;
+	MEMBER member[100];
+	BOOKGRASP bookgrasp[100];
+	system("cls");
+	
+	p2=fopen("infomember.txt","r");	
+	number=0;	
+	while(!feof(p2))
+	{
+		fscanf(p2,"%s %s %s %s %s\n",member[number].ID,member[number].password,
+				member[number].password_key,member[number].name,member[number].sex);
+		number++;
+	}
+	fclose(p2);
+	
+	p3=fopen("memberbook.txt","r");
+			booknumber=0;
+			while(!feof(p3))
+			{
+				fscanf(p3,"%s %s %s %s %s %f %s\n",
+						bookgrasp[booknumber].number,bookgrasp[booknumber].name,bookgrasp[booknumber].author,bookgrasp[booknumber].press,
+						bookgrasp[booknumber].category,&bookgrasp[booknumber].price,bookgrasp[booknumber].account);
+				booknumber++;
+			}
+			fclose(p3);
+			if(bookgrasp[0].price<=1e-8)
+			{
+				printf("当前图书馆未有任何借书信息");
+				flag=0;
+				printf("\n\n按任意键返回!\n");
+   				getch();
+			}
+			else{ 		
+				for(n=0;n<number;n++)
+					if(strcmp(member[n].ID,account)==0)
+					{
+						i=0;
+						printf("\n");
+						printf("|---------------------------个人信息-------------------------|\n");
+    					printf("|姓名        性别      ID              密码                  |\n");
+    					printf("|%-12s%-10s%-16s%-22s%|\n",member[n].name,member[n].sex,member[n].ID,member[n].password);
+    					printf("|                                                            |\n");
+    					printf("|----------------------------图书借阅信息--------------------|\n");
+      					printf("|编号  书名        作者      出版社          类别    单价    |\n");
+      		
+      					while(i<booknumber)
+       				 	{
+        					if(strcmp(bookgrasp[i].account,account)==0)
+        					{
+							printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f|\n",bookgrasp[i].number,
+									bookgrasp[i].name,bookgrasp[i].author,bookgrasp[i].press,
+									bookgrasp[i].category,bookgrasp[i].price);
+							count++;
+							}
+        					i++;
+        				}
+        				if(strcmp(member[n].sex,"male")==0) 
+       				 	printf("\n%s先生，您当前借阅的书籍共有%d本。",member[n].name,count);
+        				else if(strcmp(member[n].sex,"female")==0)
+        				printf("\n%s女士，您当前借阅的书籍共有%d本。",member[n].name,count);
+        				else
+						printf("\n%s，您当前借阅的书籍共有%d本。",member[n].name,count); 
+        				
+						if(bookgrasp[0].price<=1e-8) 
+       				 	printf("\n而图书馆内共有0本书籍正在被借阅。\n");
+       				 	else
+       				 	printf("\n而图书馆内共有%d本书籍正在被借阅。\n",booknumber);
+        	
+						printf("\nPS:是否需要修改密码(y/n):");
+						fflush(stdin);
+						choice=getch();
+						while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	   					choice=getch();
+						printf("%c",choice);
+						printf("\n");
+						if(choice=='Y'||choice=='y')
+						{
+							printf("\n请输入修改密码的密钥(user_key):");
+							fflush(stdin);
+							gets(key);
+							if(strcmp(member[n].password_key,key)==0)
+							{
+								printf("请输入新密码：");
+								fflush(stdin);
+								gets(new_password);
+								strcpy(member[n].password,new_password);
+								flag=1;
+								p2=fopen("infomember.txt","w");
+            					for(n=0;n<number;n++)
+            					fprintf(p2,"%s %s %s %s %s\n",member[n].ID,member[n].password,
+										member[n].password_key,member[n].name,member[n].sex);
+           						fclose(p2);
+           						}
+           						else{
+           							printf("\n输入密钥错误!"); 
+								}
+							}
+						else
+							flag=0; 
+    					}
+    					
+    				}		 
+   	if(flag==1)
+   		{
+		    printf("\n密码修改成功！"); 
+		    printf("\n按任意键返回!\n");
+   			getch();
+		    return 1;
+		}
+    else{
+   		return 0;
+	}
+} 
+
+void find_account()/*账户找回函数*/
+{
+	FILE *p2;
+	MEMBER member[100];
+	int number,n,k=3,flag=1,mark=0;
+	char choice='0';
+	char vacancy[10]="";
+	char search[30],compare[30],new_password[20];
+
+    	system("cls");
+    	fflush(stdin);
+    	printf("输入您的姓名:");
+    	gets(search);
+      	p2=fopen("infomember.txt","r");
+      	number=0;
+      	while(!feof(p2))
+        {
+        	fscanf(p2,"%s %s %s %s %s\n",member[number].ID,member[number].password,
+					member[number].password_key,member[number].name,member[number].sex);
+        	number++;
+        }
+      	fclose(p2);
+      	if(strcmp(member[0].ID,vacancy)==0)
+        {
+        	printf("系统中还没有任何会员信息!\n\n");
+        }
+        else
+        {
+        	for(n=0;n<number;n++)
+         		if(strcmp(member[n].name,search)==0)
+            	{
+            		mark=1;
+            		while(flag)
+            		{
+						printf("请输入您的密钥:");
+						fflush(stdin);
+						gets(compare);
+						if(strcmp(member[n].password_key,compare)==0)
+						{
+							printf("\n");
+							printf("|------------------------------个人信息------------------------------|\n");
+    						printf("|姓名        性别      ID                  密码	                     |\n");
+    						printf("|%-12s%-10s%-20s%-26s%|\n",member[n].name,member[n].sex,member[n].ID,member[n].password);
+						
+							printf("\n是否需要修改密码(y/n):");
+							fflush(stdin);
+							choice=getch();
+							while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    					choice=getch();
+							printf("%c",choice);
+							printf("\n");
+							if(choice=='Y'||choice=='y')
+								{
+									printf("\n请输入新密码：");
+									fflush(stdin);
+									gets(new_password);
+									strcpy(member[n].password,new_password);
+									flag=0;
+								}
+							else
+								flag=0;	
+						}
+						else{
+							--k;/*密码输入次数count*/ 
+							if(k!=0)
+							{
+								printf("\n\n\n\t\t您的密码输入有误!\n\t\t您还有%d次机会重新输入密码！",k);
+								printf("您是否要继续输入密码(y/n):");
+								fflush(stdin);
+								while(choice!='Y'&&choice!='y'&&choice!='N'&&choice!='n')
+      	    						choice=getch();
+      							printf("%c",choice);
+      							printf("\n");
+								if(choice=='Y'||choice=='y')
+									flag=1;
+								else
+									flag=0;
+							}	
+							else{
+								printf("您输入次数已用完！正在退回主界面...");
+								flag=0;
+              	 		}
+					}
+				}
+			}
+ 		}
+ 		if(mark==0)
+        {
+		   	printf("您并未注册本系统会员!\n");
+        } 
+        else
+        {
+        	if(choice!='0'&&choice!='n'&&choice!='N')
+			{
+            p2=fopen("infomember.txt","w");
+            for(n=0;n<number;n++)
+            	fprintf(p2,"%s %s %s %s %s\n",member[n].ID,member[n].password,
+						member[n].password_key,member[n].name,member[n].sex);
+            fclose(p2);
+            printf("您已成功找回/修改账户!\n");
+        	}
+        }
+    printf("\n\n按任意键回到主菜单!\n");
+    fflush(stdin);
+    getch();
+} 
+ 
+int member_log_in(char account[15])/*会员登录函数*/
+{
+	FILE *p2;
+	MEMBER member[100];
+	char choice1,choice2;
+	int flag1=0,flag2=1,n,k=3;
+	int number;
+	
+    p2=fopen("infomember.txt","r");
+   	number=0;
+    while(!feof(p2))
+    {
+        fscanf(p2,"%s %s %s %s %s\n",member[number].ID,member[number].password,
+					member[number].password_key,member[number].name,member[number].sex);
+       	number++;
+    }
+    fclose(p2);
+	for(n=0;n<number;n++)
+    	if(strcmp(member[n].ID,account)==0)
+    	{
+    	    flag1=1;
+			break;
+		}
+		if(flag1)
+		{
+			while(flag2)
+			{
+				if(compare_password(member[n].password))/* 调用会员密码比对函数 */ 
+				{ 
+					printf("\n\n\n\t\t\t   核对正确！正在进入会员界面...");
+					clock_delay();
+      	       	 	return 1;
+				}
+				else{
+					--k;/*密码输入次数count*/ 
+					if(k!=0)
+					{
+						printf("\n\n\n\t\t\t   您的密码输入有误!还有%d次机会重新输入密码！",k);
+						printf("\n\t\t\t   您是否要继续输入密码(y/n):");
+						fflush(stdin);
+						choice1=getch();
+						while(choice1!='Y'&&choice1!='y'&&choice1!='N'&&choice1!='n')
+      	    				choice1=getch();
+      					printf("%c",choice1);
+						printf("\n");
+						if(choice1=='Y'||choice1=='y')
+							flag2=1;
+						else
+							return 0;
+					}
+					else{
+						printf("\n\n\t\t\t   您输入次数已用完！按任意键退出...");
+						fflush(stdin);
+   						getch(); 
+              	 		return 0;
+					}	
+				}		
+			}
+			flag2=1;
+   		}
+   		else{
+   			printf("\n\n\n\t\t\t  该ID还未注册,是否需要注册会员(y/n):");
+			choice2=getch();
+			while(choice2!='Y'&&choice2!='y'&&choice2!='N'&&choice2!='n')
+      	    	choice2=getch();
+      	    printf("%c",choice2);
+      	    printf("\n");
+      	    if(choice2=='Y'||choice2=='y')
+			{
+				member_log_up();
+				return 2; 
+			}
+			else
+				return 0; 
+		}
+}
+
+int compare_password(char *password)/*密码比对函数 */ 
+{
+	int i=0;
+	char compare[20],c;
+	fflush(stdin);
+	printf("\n\t\t\t   密码(password):");
+	while((c=getch())!=13)//\r是将光标移到该行首位
+	{
+	if(c==8&&i>0)
+	{
+	printf("\b \b");//清除*号和错符
+	i--;
+	continue;
+	}
+	if(c!=8)
+	{
+	compare[i++]=c;
+	putchar('*');
+	}
+	}
+	compare[i]='\0';
+	if(strcmp(password,compare)==0)
+		{
+		printf("\a");  //响铃
+		return 1;
+		}
+	else
+		{
+		printf("\a");  //响铃
+		return 0;
+		}
+}
+
+int check_repeat_ID(char *id_account)/*查重函数*/ 
+{
+	FILE *p2;
+	MEMBER member[100];
+	int flag1=0,flag2=1,n,number;
+	
+    p2=fopen("infomember.txt","r");
+   	number=0;
+    while(!feof(p2))
+    {
+        fscanf(p2,"%s %s %s %s %s\n",member[number].ID,member[number].password,
+					member[number].password_key,member[number].name,member[number].sex);
+       	number++;
+    }
+    fclose(p2);
+	for(n=0;n<number;n++)
+    	if(strcmp(member[n].ID,id_account)==0)
+    	{
+    	    flag1=1;
+			break;
+		}
+		if(flag1)
+		{
+			return 1;
+   		}
+   		else{
+            return 0;
+		}
+}
+
+void ADMIN_watch_member()/*查看会员信息函数*/
+{
+	FILE *p2;
+	MEMBER member[100];
+	int n,number;
+	system("cls");
+	fflush(stdin);
+	
+	p2=fopen("infomember.txt","r");
+	number=0;
+	while(!feof(p2))
+	{
+		fscanf(p2,"%s %s %s %s %s\n",member[number].ID,member[number].password,
+					member[number].password_key,member[number].name,member[number].sex);
+		number++;
+	}
+	fclose(p2);
+	
+	printf("系统注册用户有%d位:",number);
+	printf("\n\n");
+	printf("|-----------------------会员信息-----------------------|\n");
+    printf("|姓名      性别    ID            密码  	         密钥  |\n");
+    for(n=0;n<number;n++)
+		printf("|%-10s%-8s%-14s%-16s%-6s%|\n",member[n].name,member[n].sex,
+				member[n].ID,member[n].password,member[n].password_key);
+
+    printf("\n\n按任意键返回上一级菜单!\n");
+   	getch();
+} 
+
+void display_memberbook()/*查看所有图书借阅信息函数*/
+{
+	FILE *p3;
+	BOOKGRASP bookgrasp[100];
+	int booknumber,n;
+	system("cls");
+	
+	p3=fopen("memberbook.txt","r");
+	booknumber=0;
+	while(!feof(p3))
+	{
+		fscanf(p3,"%s %s %s %s %s %f %s\n",
+				bookgrasp[booknumber].number,bookgrasp[booknumber].name,bookgrasp[booknumber].author,bookgrasp[booknumber].press,
+				bookgrasp[booknumber].category,&bookgrasp[booknumber].price,bookgrasp[booknumber].account);
+		booknumber++;
+	}
+	if(bookgrasp[0].price==0.0)
+		printf("当前没有借阅信息");
+	else{ 
+	printf("当前共有%d位会员借阅书籍。",booknumber);
+	printf("\n");
+   	printf("|---------------------------借阅图书信息-----------------------------------|\n");
+   	printf("|编号  书名        作者      出版社          类别    单价    借阅ID        |\n");
+   	printf("|                                                                          |\n");
+    for(n=0;n<booknumber;n++)		
+       	printf("|%-6s%-12s%-10s%-16s%-8s%-8.1f%-14s|\n",bookgrasp[n].number,
+				bookgrasp[n].name,bookgrasp[n].author,bookgrasp[n].press,
+				bookgrasp[n].category,bookgrasp[n].price,bookgrasp[n].account); 
+	} 
+	printf("\n\n输入任意键返回...");
+	fflush(stdin);
+	getch(); 
+} 
+
+void password_circle()/*画框函数*/ 
+{
+	system("cls");
+	printf("\n\n\n\t\t\t***================================*** \n");
+	printf("\t\t\t                                   \n");
+	printf("\t\t\t   账户 (account):");
+}
+
+void clock_delay()/*时间延时函数*/
+{
+	clock_t tm;
+	tm=clock();
+    while(clock()<tm+1000);
+}	
+
+void find_account_circle()/*找回账户弹出框函数*/
+{
+	printf("\n\n\n\n");
+	printf("\t\t\t===============H-E-L-P===================\n");
+	printf("\t\t\t|                                       |\n");
+	printf("\t\t\t* 您需不需要通过密钥找回账户？(输入y/n) *\n");
+	printf("\t\t\t|                                       |\n");
+	printf("\t\t\t=========================================\n");
+	printf("\n\t\t\t您的选择是:");
+}