考试模块的完善及试卷的录入

Question

学生考试系统：实现学生的试卷管理、考试、批改和成绩统计功能。系统可以管理多个考试科目和学生信息，包括试卷内容和学生答案。教师可以录入试卷，学生可以进行考试，系统需要支持试卷的批改和成绩的统计。

Answer 1

不是提问过一次了吗，我的链接里面就有我的回答代码，怎么回事？不符合可以回复交流，有帮助记得采纳

#include <stdio.h>
#include <string.h>
struct student {
    char name[20];
    char password[20];
    int score;
};
struct teacher {
    char name[20];
    char password[20];
};
int student_login(struct student *students, int n)
{
    char name[20];
    char password[20];
    printf("请输入用户名：");
    scanf("%s", name);
    printf("请输入密码：");
    scanf("%s", password);
    for (int i = 0; i < n; i++) {
        if (strcmp(students[i].name, name) == 0 && strcmp(students[i].password, password) == 0) {
            printf("登录成功！\n");
            printf("欢迎您，%s！\n", students[i].name);
            return i;
        }
    }
    printf("用户名或密码错误！\n");
    return -1;
}
int teacher_login(struct teacher *teachers, int n)
{
    char name[20];
    char password[20];
    printf("请输入用户名：");
    scanf("%s", name);
    printf("请输入密码：");
    scanf("%s", password);
    for (int i = 0; i < n; i++) {
        if (strcmp(teachers[i].name, name) == 0 && strcmp(teachers[i].password, password) == 0) {
            printf("登录成功！\n");
            printf("欢迎您，%s！\n", teachers[i].name);
            return i;
        }
    }
    printf("用户名或密码错误！\n");
    return -1;
}
void add_student(struct student *students, int n)
{
    printf("请输入学生姓名：");
    scanf("%s", students[n].name);
    printf("请输入学生密码：");
    scanf("%s", students[n].password);
    students[n].score = 0;
    printf("添加成功！\n");
}
void delete_student(struct student *students, int n)
{
    char name[20];
    printf("请输入要删除的学生姓名：");
    scanf("%s", name);
    for (int i = 0; i < n; i++) {
        if (strcmp(students[i].name, name) == 0) {
            for (int j = i; j < n - 1; j++) {
                students[j] = students[j + 1];
            }
            printf("删除成功！\n");
            return;
        }
    }
    printf("未找到该学生！\n");
}
void print_student_scores(struct student *students, int n)
{
    printf("%-10s%-10s\n", "姓名", "成绩");
    for (int i = 0; i < n; i++) {
        printf("%-10s%-10d\n", students[i].name, students[i].score);
    }
}
void modify_student_score(struct student *students, int n)
{
    char name[20];
    int score;
    printf("请输入要修改成绩的学生姓名：");
    scanf("%s", name);
    for (int i = 0; i < n; i++) {
        if (strcmp(students[i].name, name) == 0) {
            printf("请输入新的成绩：");
            scanf("%d", &score);
            students[i].score = score;
            printf("修改成功！\n");
            return;
        }
    }
    printf("未找到该学生！\n");
}
void exam(struct student *students, int student_index)
{
    char *subjects[] = {"数学", "语文", "英语", "物理"};
    char *questions[] = {
        "1 + 1 = ?\nA. 1\nB. 2\nC. 3\nD. 4\n",
        "我国的首都是？\nA. 北京\nB. 上海\nC. 广州\nD. 深圳\n",
        "What's your name?\nA. Tom\nB. Mike\nC. Jack\nD. None of the above\n",
        "牛顿第二定律的公式为？\nA. F = ma\nB. E = mc2\nC. F = G(m1m2)/r^2\nD. P = F/A\n"
    };
    char *answers[] = {"B", "A", "D", "A"};
    int choice;
    printf("请选择考试科目：\n");
    for (int i = 0; i < 4; i++) {
        printf("%d. %s\n", i + 1, subjects[i]);
    }
    scanf("%d", &choice);
    choice--;
    printf("开始考试！\n");
    printf("--------------------\n");
    for (int i = 0; i < 4; i++) {
        printf("第%d题：\n%s", i + 1, questions[i]);
        char answer[10];
        scanf("%s", answer);
        if (strcmp(answer, answers[i]) == 0) {
            printf("你的答案是：%s，恭喜你，回答正确！\n", answer);
            students[student_index].score += 2;
        } else {
            printf("你的答案是：%s，很遗憾，回答错误！\n", answer);
        }
    }
    printf("考试结束！\n");
    printf("--------------------\n");
}
void init(struct student *students, int *student_count, struct teacher *teachers, int *teacher_count) {
    // 添加学生信息
    strcpy(students[0].name, "小明");
    strcpy(students[0].password, "123456");
    students[0].score = 0;
    strcpy(students[1].name, "小红");
    strcpy(students[1].password, "111111");
    students[1].score = 0;
    *student_count = 2;
    // 添加教师信息
    strcpy(teachers[0].name, "张老师");
    strcpy(teachers[0].password, "123456");
    *teacher_count = 1;
}
int main()
{
    struct student students[100];
    int student_count = 0;
    struct teacher teachers[100];
    int teacher_count = 0;
    int student_index = -1;
    int teacher_index = -1;
    int choice;
    init(students, &student_count, teachers, &teacher_count);
    while (1) {
        printf("请选择登录身份：\n");
        printf("1. 学生\n");
        printf("2. 教师\n");
        printf("3. 退出程序\n");
        scanf("%d", &choice);
        if (choice == 1) {
            student_index = student_login(students, student_count);
            if (student_index != -1) {
                while (1) {
                    printf("请选择操作：\n");
                    printf("1. 开始考试\n");
                    printf("2. 退出登录\n");
                    scanf("%d", &choice);
                    if (choice == 1) {
                        exam(students, student_index);
                    } else if (choice == 2) {
                        student_index = -1;
                        break;
                    } else {
                        printf("输入有误，请重新输入！\n");
                    }
                }
            }
        } else if (choice == 2) {
            teacher_index = teacher_login(teachers, teacher_count);
            if (teacher_index != -1) {
                while (1) {
                    printf("请选择操作：\n");
                    printf("1. 添加学生\n");
                    printf("2. 删除学生\n");
                    printf("3. 查看成绩\n");
                    printf("4. 修改成绩\n");
                    printf("5. 退出登录\n");
                    scanf("%d", &choice);
                    if (choice == 1) {
                        add_student(students, student_count);
                        student_count++;
                    } else if (choice == 2) {
                        delete_student(students, student_count);
                        student_count--;
                    } else if (choice == 3) {
                        print_student_scores(students, student_count);
                    } else if (choice == 4) {
                        modify_student_score(students, student_count);
                    } else if (choice == 5) {
                        teacher_index = -1;
                        break;
                    } else {
                        printf("输入有误，请重新输入！\n");
                    }
                }
            }
        } else if (choice == 3) {
            break;
        } else {
            printf("输入有误，请重新输入！\n");
        }
    }
    printf("程序已退出！\n");
    return 0;
}