帮我用C语言写一个学生选课及学籍管理系统

当然可以！以下是一个简单的示例代码，实现了基本的学生选课及学籍管理系统功能。请注意，这只是一个简单的示例，可能需要根据实际需求进行进一步的完善和扩展。

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

#define MAX_STUDENTS 100
#define MAX_COURSES 10
#define MAX_NAME_LENGTH 50

typedef struct {
    char name[MAX_NAME_LENGTH];
    int studentId;
    int courseId;
} Student;

typedef struct {
    char name[MAX_NAME_LENGTH];
    int courseId;
} Course;

Student students[MAX_STUDENTS];
Course courses[MAX_COURSES];
int numStudents = 0;
int numCourses = 0;

void addStudent() {
    if (numStudents >= MAX_STUDENTS) {
        printf("Max number of students reached.\n");
        return;
    }

    Student newStudent;
    printf("Enter student name: ");
    scanf("%s", newStudent.name);
    printf("Enter student ID: ");
    scanf("%d", &newStudent.studentId);

    students[numStudents++] = newStudent;
    printf("Student added successfully.\n");
}

void addCourse() {
    if (numCourses >= MAX_COURSES) {
        printf("Max number of courses reached.\n");
        return;
    }

    Course newCourse;
    printf("Enter course name: ");
    scanf("%s", newCourse.name);
    printf("Enter course ID: ");
    scanf("%d", &newCourse.courseId);

    courses[numCourses++] = newCourse;
    printf("Course added successfully.\n");
}

void enrollStudent() {
    int studentId, courseId;
    printf("Enter student ID: ");
    scanf("%d", &studentId);
    printf("Enter course ID: ");
    scanf("%d", &courseId);

    int studentIndex = -1;
    for (int i = 0; i < numStudents; i++) {
        if (students[i].studentId == studentId) {
            studentIndex = i;
            break;
        }
    }

    if (studentIndex == -1) {
        printf("Student not found.\n");
        return;
    }

    int courseIndex = -1;
    for (int i = 0; i < numCourses; i++) {
        if (courses[i].courseId == courseId) {
            courseIndex = i;
            break;
        }
    }

    if (courseIndex == -1) {
        printf("Course not found.\n");
        return;
    }

    students[studentIndex].courseId = courseId;
    printf("Student enrolled successfully.\n");
}

void displayStudents() {
    printf("Students:\n");
    for (int i = 0; i < numStudents; i++) {
        printf("Name: %s, ID: %d, Course ID: %d\n", students[i].name, students[i].studentId, students[i].courseId);
    }
}

void displayCourses() {
    printf("Courses:\n");
    for (int i = 0; i < numCourses; i++) {
        printf("Name: %s, ID: %d\n", courses[i].name, courses[i].courseId);
    }
}

int main() {
    int choice;

    do {
        printf("\nStudent Enrollment System\n");
        printf("1. Add Student\n");
        printf("2. Add Course\n");
        printf("3. Enroll Student\n");
        printf("4. Display Students\n");
        printf("5. Display Courses\n");
        printf("0. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent();
                break;
            case 2:
                addCourse();
                break;
            case 3:
                enrollStudent();
                break;
            case 4:
                displayStudents();
                break;
            case 5:
                displayCourses();
                break;
            case 0:
                printf("Exiting program.\n");
                break;
            default:
                printf("Invalid choice.\n");
                break;
        }
    } while (choice != 0);

    return 0;
}

这个简单的学生选课及学籍管理系统允许你添加学生、添加课程、为学生选课、显示学生列表和课程列表。你可以根据实际需求对其进行扩展和改进。希望对你有所帮助！