学生选课管理系统c语言源代码

以下是一个简单的学生选课管理系统的C语言源代码示例。这个系统可以实现基本的学生和课程管理功能，包括添加学生、添加课程、选课和查看选课情况。

#include <stdio.h>
#include <string.h>

#define MAX_STUDENTS 100
#define MAX_COURSES 100
#define NAME_LENGTH 50

struct Student {
    int id;
    char name[NAME_LENGTH];
};

struct Course {
    int id;
    char name[NAME_LENGTH];
};

struct Enrollment {
    int student_id;
    int course_id;
};

struct Student students[MAX_STUDENTS];
int student_count = 0;

struct Course courses[MAX_COURSES];
int course_count = 0;

struct Enrollment enrollments[MAX_STUDENTS * MAX_COURSES];
int enrollment_count = 0;

void add_student() {
    if (student_count >= MAX_STUDENTS) {
        printf("学生数量已达上限。\n");
        return;
    }
    struct Student s;
    printf("请输入学生ID: ");
    scanf("%d", &s.id);
    printf("请输入学生姓名: ");
    scanf("%s", s.name);
    students[student_count++] = s;
    printf("学生添加成功。\n");
}

void add_course() {
    if (course_count >= MAX_COURSES) {
        printf("课程数量已达上限。\n");
        return;
    }
    struct Course c;
    printf("请输入课程ID: ");
    scanf("%d", &c.id);
    printf("请输入课程名称: ");
    scanf("%s", c.name);
    courses[course_count++] = c;
    printf("课程添加成功。\n");
}

void enroll_course() {
    int student_id, course_id;
    printf("请输入学生ID: ");
    scanf("%d", &student_id);
    printf("请输入课程ID: ");
    scanf("%d", &course_id);

    for (int i = 0; i < student_count; i++) {
        if (students[i].id == student_id) {
            for (int j = 0; j < course_count; j++) {
                if (courses[j].id == course_id) {
                    enrollments[enrollment_count].student_id = student_id;
                    enrollments[enrollment_count].course_id = course_id;
                    enrollment_count++;
                    printf("选课成功。\n");
                    return;
                }
            }
            printf("课程不存在。\n");
            return;
        }
    }
    printf("学生不存在。\n");
}

void view_enrollments() {
    printf("选课情况:\n");
    for (int i = 0; i < enrollment_count; i++) {
        int student_id = enrollments[i].student_id;
        int course_id = enrollments[i].course_id;
        char student_name[NAME_LENGTH], course_name[NAME_LENGTH];

        for (int j = 0; j < student_count; j++) {
            if (students[j].id == student_id) {
                strcpy(student_name, students[j].name);
                break;
            }
        }

        for (int j = 0; j < course_count; j++) {
            if (courses[j].id == course_id) {
                strcpy(course_name, courses[j].name);
                break;
            }
        }

        printf("学生: %s, 课程: %s\n", student_name, course_name);
    }
}

int main() {
    int choice;
    while (1) {
        printf("\n学生选课管理系统\n");
        printf("1. 添加学生\n");
        printf("2. 添加课程\n");
        printf("3. 选课\n");
        printf("4. 查看选课情况\n");
        printf("5. 退出\n");
        printf("请选择操作: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                add_course();
                break;
            case 3:
                enroll_course();
                break;
            case 4:
                view_enrollments();
                break;
            case 5:
                printf("退出系统。\n");
                return 0;
            default:
                printf("无效选择，请重新选择。\n");
        }
    }
}

这个程序实现了以下功能：

1. 添加学生
2. 添加课程
3. 学生选课
4. 查看选课情况