void basicSettings(struct Student* student, struct Course courses[], int* numCourses) { int choose; printf("\n--------基本设置--------\n"); printf("\n--------1.添加学生信息--------\n"); printf("\n--------2.添加老师信息--------\n"); printf("\n--------3.修改密码--------\n"); printf("\n--------4.返回--------\n"); printf("请输入您的选择：\n"); scanf("%d", &choose); if(choose==1){ printf("\n"); printf("请输入班级："); scanf("%s", student->className); printf("请输入学号："); scanf("%s", student->id); printf("请输入姓名："); scanf("%s", student->name); } if(choose==2) { printf("\n"); printf("请输入课程数："); scanf("%d", numCourses); printf("请输入每门课程的名称和教师名字：\n"); for (int i = 0; i < *numCourses; i++) { printf("第%d门课程：", i + 1); scanf("%s %s", courses[i].name, courses[i].teacher); } } if(choose==3) { void changePassword(struct User* user) { printf("\n--------修改密码--------\n"); printf("请输入旧密码："); char oldpassword[MAX_NAME_LEN]; scanf("%s", oldpassword); if (strcmp(oldpassword, user->password) != 0) { printf("密码错误，修改失败！\n"); return; } printf("请输入新密码："); scanf("%s", user->password); printf("密码已修改！\n"); } changePassword(user_p); } FILE* fp = fopen("student.dat", "wb"); if (fp == NULL) { printf("无法打开文件！\n"); return; } fwrite(student, sizeof(struct Student), 1, fp); fclose(fp); fp = fopen("courses.dat", "wb"); if (fp == NULL) { printf("无法打开文件！\n"); return; } fwrite(courses, sizeof(struct Course), *numCourses, fp); fclose(fp); printf("设置已保存！\n"); } 修改代码

在函数basicSettings中，我发现有一个内嵌的函数changePassword。这个函数的定义在if(choose==3)的条件下，最好将其定义移到函数basicSettings的外面，避免出现嵌套函数的情况。同时，在函数内部，应该检查文件是否成功打开，如果打开失败，应该返回错误信息。修改后的代码如下：

void changePassword(struct User* user) {
    printf("\n--------修改密码--------\n");
    printf("请输入旧密码：");
    char oldpassword[MAX_NAME_LEN];
    scanf("%s", oldpassword);
    if (strcmp(oldpassword, user->password) != 0) {
        printf("密码错误，修改失败！\n");
        return;
    }
    printf("请输入新密码：");
    scanf("%s", user->password);
    printf("密码已修改！\n");
}

void basicSettings(struct Student* student, struct Course courses[], int* numCourses) {
    int choose;
    printf("\n--------基本设置--------\n");
    printf("\n--------1.添加学生信息--------\n");
    printf("\n--------2.添加老师信息--------\n");
    printf("\n--------3.修改密码--------\n");
    printf("\n--------4.返回--------\n");
    printf("请输入您的选择：\n");
    scanf("%d", &choose);
    if (choose == 1) {
        printf("\n");
        printf("请输入班级：");
        scanf("%s", student->className);
        printf("请输入学号：");
        scanf("%s", student->id);
        printf("请输入姓名：");
        scanf("%s", student->name);
    }
    if (choose == 2) {
        printf("\n");
        printf("请输入课程数：");
        scanf("%d", numCourses);
        printf("请输入每门课程的名称和教师名字：\n");
        for (int i = 0; i < *numCourses; i++) {
            printf("第%d门课程：", i + 1);
            scanf("%s %s", courses[i].name, courses[i].teacher);
        }
    }
    if (choose == 3) {
        changePassword(user_p);
    }
    FILE* fp = fopen("student.dat", "wb");
    if (fp == NULL) {
        printf("无法打开学生文件！\n");
        return;
    }
    fwrite(student, sizeof(struct Student), 1, fp);
    fclose(fp);

    fp = fopen("courses.dat", "wb");
    if (fp == NULL) {
        printf("无法打开课程文件！\n");
        return;
    }
    fwrite(courses, sizeof(struct Course), *numCourses, fp);
    fclose(fp);

    printf("设置已保存！\n");
}