c语言写个学生管理系统

好的，下面是一个简单的学生管理系统的 C 语言代码：

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

#define MAX_STUDENTS 50

struct student {
    char name[20];
    int age;
    int score;
};

int num_students = 0;
struct student students[MAX_STUDENTS];

void add_student() {
    if (num_students >= MAX_STUDENTS) {
        printf("Error: too many students\n");
        return;
    }

    struct student s;
    printf("Enter name: ");
    scanf("%s", s.name);
    printf("Enter age: ");
    scanf("%d", &s.age);
    printf("Enter score: ");
    scanf("%d", &s.score);

    students[num_students] = s;
    num_students++;
}

void print_student(struct student s) {
    printf("%s (age %d): %d\n", s.name, s.age, s.score);
}

void list_students() {
    for (int i = 0; i < num_students; i++) {
        print_student(students[i]);
    }
}

void find_student() {
    char name[20];
    printf("Enter name: ");
    scanf("%s", name);

    for (int i = 0; i < num_students; i++) {
        if (strcmp(students[i].name, name) == 0) {
            print_student(students[i]);
            return;
        }
    }

    printf("Student not found\n");
}

int main() {
    int choice;

    while (1) {
        printf("1. Add student\n");
        printf("2. List students\n");
        printf("3. Find student\n");
        printf("4. Exit\n");
        printf("Enter choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                list_students();
                break;
            case 3:
                find_student();
                break;
            case 4:
                exit(0);
            default:
                printf("Invalid choice\n");
        }
    }

    return 0;
}

该程序使用结构体来存储学生的姓名、年龄和分数信息。用户可以选择添加学生、列出所有学生、查找学生或退出程序。程序可以存储最多50个学生的信息。