added library management system in c

c_programming/librarymanagement.c

@@ -0,0 +1,127 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct book {
+    int id;
+    char name[100];
+    char author[100];
+    int status; // 0: available, 1: issued
+} book;
+
+book books[100];
+int num_books = 0;
+
+void add_book() {
+    book new_book;
+
+    printf("Enter book ID: ");
+    scanf("%d", &new_book.id);
+
+    printf("Enter book name: ");
+    scanf("%s", new_book.name);
+
+    printf("Enter book author: ");
+    scanf("%s", new_book.author);
+
+    new_book.status = 0;
+
+    books[num_books++] = new_book;
+}
+
+void list_books() {
+    printf("\nList of books:\n");
+    for (int i = 0; i < num_books; i++) {
+        printf("%d. %s by %s\n", books[i].id, books[i].name, books[i].author);
+    }
+}
+
+void issue_book() {
+    int book_id;
+    int member_id;
+
+    printf("Enter book ID: ");
+    scanf("%d", &book_id);
+
+    printf("Enter member ID: ");
+    scanf("%d", &member_id);
+
+    int book_index = -1;
+    for (int i = 0; i < num_books; i++) {
+        if (books[i].id == book_id) {
+            book_index = i;
+            break;
+        }
+    }
+
+    if (book_index == -1) {
+        printf("Book not found.\n");
+    } else if (books[book_index].status == 1) {
+        printf("Book is already issued.\n");
+    } else {
+        books[book_index].status = 1;
+        printf("Book issued successfully.\n");
+    }
+}
+
+void return_book() {
+    int book_id;
+
+    printf("Enter book ID: ");
+    scanf("%d", &book_id);
+
+    int book_index = -1;
+    for (int i = 0; i < num_books; i++) {
+        if (books[i].id == book_id) {
+            book_index = i;
+            break;
+        }
+    }
+
+    if (book_index == -1) {
+        printf("Book not found.\n");
+    } else if (books[book_index].status == 0) {
+        printf("Book is already returned.\n");
+    } else {
+        books[book_index].status = 0;
+        printf("Book returned successfully.\n");
+    }
+}
+
+int main() {
+    int choice;
+
+    do {
+        printf("\nLibrary Management System\n");
+        printf("1. Add book\n");
+        printf("2. List books\n");
+        printf("3. Issue book\n");
+        printf("4. Return book\n");
+        printf("5. Exit\n");
+
+        printf("Enter your choice: ");
+        scanf("%d", &choice);
+
+        switch (choice) {
+            case 1:
+                add_book();
+                break;
+            case 2:
+                list_books();
+                break;
+            case 3:
+                issue_book();
+                break;
+            case 4:
+                return_book();
+                break;
+            case 5:
+                exit(0);
+                break;
+            default:
+                printf("Invalid choice.\n");
+        }
+    } while (choice != 5);
+
+    return 0;
+}