提交代码

2209040028/THE test of student

@@ -0,0 +1,173 @@
+void add_question(QuestionBank L)
+      {
+	question* p = L, * n = newQuestion();
+	int i;
+	printf("请输入问题：");
+	scanf("%s", n->que);
+	for (i = 0; i < 4; ++i)
+	{
+		printf("请输入选项%c：", i + 'A');
+		scanf("%s", n->options[i]);
+	}
+	while (getchar() != '\n');
+	printf("请输入正确选项（A、B、C、D中的一个）：");
+	scanf("%c", &n->answer);
+	printf("请输入本题分数：");
+	scanf("%f", &n->score);
+	while (p->next) p = p->next;
+	p->next = n;
+	printf("录入成功\n");
+      }
+
+3.2修改试题模块
+
+
+      void modify_question(QuestionBank L)
+      {
+	question* p = L->next;
+	int i = 0, choose;
+	while (p)
+	{
+		printf("%d. %s\n", i + 1, p->que);
+		p = p->next;
+		++i;
+	}
+	printf("%d. 返回主菜单\n", i + 1);
+	printf("请输入序号，选择要修改的试题：");
+	scanf("%d", &choose);
+	if (choose < 0 || choose >= i + 1)
+	{
+		if (choose != i + 1)
+			printf("输入错误，将返回主菜单\n");
+		return;
+	}
+	else
+	{
+		int j;
+		p = L;
+		for (i = 0; p->next && i < choose; ++i)
+			p = p->next;
+		printf("请输入问题：");
+		scanf("%s", p->que);
+		for (j = 0; j < 4; ++j)
+		{
+			printf("请输入选项%c：", j + 'A');
+			scanf("%s", p->options[j]);
+		} 
+		while (getchar() != '\n');
+		printf("请输入正确选项（A、B、C、D中的一个）：");
+		scanf("%c", &p->answer);
+		printf("请输入本题分数：");
+		scanf("%f", &p->score);
+		printf("修改成功\n");
+	}
+}
+
+
+3.3抽取试题模块
+
+
+        void extract_questions(QuestionBank L, QuestionBank TestPaper)
+        {
+	int N, n = 0; //N是总的抽题数，n是当前抽题数
+	int num = 0; //当前题目总数
+	printf("请输入要抽取的题目数量：");
+	scanf("%d", &N);
+	question* p = L;
+	while (p)
+	{
+		++num;
+		p = p->next;
+	}
+	if (N >= num)
+	{
+		printf("抽取题目数量大于当前已录入的题目数\n");
+		return;
+	}
+	printf("试题抽取中，请耐心等待.....\n");
+	while (n < N)
+	{
+		int i = 0, max_rand = 0;
+		question* p1 = L, * p2 = TestPaper;
+		srand(time(0) + i);
+		max_rand = rand() % num + 1;
+		while (i < max_rand)
+		{
+			p1 = p1->next;
+			++i;
+		}
+		if (!is_repeat(TestPaper, p1))
+		{
+			p1->nextQuestion = p2->nextQuestion;
+			p2->nextQuestion = p1;
+			++n;
+		}
+	}
+	printf("试卷生成成功\n");
+}
+界面展示：
+
+
+
+
+
+3.4答题模块
+
+void answer_questions(QuestionBank TestPaper)
+{
+	question* p = TestPaper->nextQuestion;
+	if (!p)
+		printf("当前还未生成试卷\n");
+	while (p)
+	{
+		char ans;
+		print_question(p);
+		while (getchar() != '\n');
+
+		scanf("%c", &ans);
+		if (ans == p->answer)
+		{
+			p->is_right = 1;
+			printf("恭喜答对\n");
+		}
+		else
+		{
+			p->is_right = 0;
+			printf("很遗憾，答错了\n");
+		}
+		p = p->nextQuestion;
+	}
+}
+
+界面展示：
+
+
+3.5评分模块
+
+void give_score(QuestionBank TestPaper)
+{
+	int r = 0, w = 0;
+	float score_r = 0, score_w = 0;
+	question* p = TestPaper->nextQuestion;
+	if (!p)
+	{
+		printf("请先生成试卷后答题，最后再来评分！\n");
+		return;
+	}
+	while (p)
+	{
+		if (p->is_right)
+		{
+			++r;
+			score_r += p->score;
+		}
+		else
+		{
+			++w;
+			score_w += p->score;
+		}
+		p = p->nextQuestion;
+	}
+	printf("本次共答了%d道题，其中答对%d道，答错%d道\n", r + w, r, w);
+	printf("总分：%.1f分，你的得分：%.1f分\n", score_r + score_w, score_r);
+}