使用c语言写出一个简易课程信息管理系统

好的，下面是一个简单的课程信息管理系统，使用C语言编写：

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

#define MAX_COURSES 100

typedef struct {
    char code[10];
    char name[50];
    int credit_hours;
    float grade;
} Course;

Course courses[MAX_COURSES];
int num_courses = 0;

int menu();
void add_course();
void print_courses();
void save_courses();
void load_courses();

int main() {
    int choice;

    load_courses();

    do {
        choice = menu();

        switch (choice) {
            case 1:
                add_course();
                break;
            case 2:
                print_courses();
                break;
            case 3:
                save_courses();
                break;
            case 4:
                printf("Exiting...\n");
                break;
            default:
                printf("Invalid choice!\n");
                break;
        }
    } while (choice != 4);

    return 0;
}

int menu() {
    int choice;

    printf("\n");
    printf("Course Information Management System\n");
    printf("------------------------------------\n");
    printf("1. Add Course\n");
    printf("2. Print Courses\n");
    printf("3. Save Courses\n");
    printf("4. Exit\n");
    printf("Enter choice (1-4): ");
    scanf("%d", &choice);

    return choice;
}

void add_course() {
    if (num_courses == MAX_COURSES) {
        printf("Maximum number of courses reached!\n");
        return;
    }

    Course new_course;

    printf("Enter course code: ");
    scanf("%s", new_course.code);
    printf("Enter course name: ");
    scanf("%s", new_course.name);
    printf("Enter credit hours: ");
    scanf("%d", &new_course.credit_hours);
    printf("Enter grade: ");
    scanf("%f", &new_course.grade);

    courses[num_courses++] = new_course;

    printf("Course added successfully!\n");
}

void print_courses() {
    if (num_courses == 0) {
        printf("No courses found!\n");
        return;
    }

    printf("Course Code\tCourse Name\tCredit Hours\tGrade\n");
    printf("--------------------------------------------------\n");

    for (int i = 0; i < num_courses; i++) {
        printf("%s\t%s\t%d\t\t%.2f\n", courses[i].code, courses[i].name, courses[i].credit_hours, courses[i].grade);
    }
}

void save_courses() {
    char filename[50];

    printf("Enter filename to save to: ");
    scanf("%s", filename);

    FILE* fp = fopen(filename, "w");

    if (fp == NULL) {
        printf("Error opening file!\n");
        return;
    }

    for (int i = 0; i < num_courses; i++) {
        fprintf(fp, "%s,%s,%d,%.2f\n", courses[i].code, courses[i].name, courses[i].credit_hours, courses[i].grade);
    }

    fclose(fp);

    printf("Courses saved successfully!\n");
}

void load_courses() {
    char filename[50];
    char line[100];

    printf("Enter filename to load from: ");
    scanf("%s", filename);

    FILE* fp = fopen(filename, "r");

    if (fp == NULL) {
        printf("Error opening file!\n");
        return;
    }

    while (fgets(line, sizeof(line), fp)) {
        char* code = strtok(line, ",");
        char* name = strtok(NULL, ",");
        int credit_hours = atoi(strtok(NULL, ","));
        float grade = atof(strtok(NULL, ","));

        Course new_course;

        strcpy(new_course.code, code);
        strcpy(new_course.name, name);
        new_course.credit_hours = credit_hours;
        new_course.grade = grade;

        courses[num_courses++] = new_course;
    }

    fclose(fp);

    printf("Courses loaded successfully!\n");
}

这个程序使用结构体来存储课程信息，包括课程代码、课程名称、学分和成绩。它提供了四个选项：添加课程、打印课程、保存课程和退出程序。你可以根据自己的需要进行扩展和修改。