写一个c++的学生管理系统

以下是一个简单的C语言学生管理系统的代码示例：

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

#define MAX_STUDENTS 100

struct Student {
    int id;
    char name[50];
    int age;
    float gpa;
};

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

void add_student() {
    struct Student new_student;
    printf("Enter student ID: ");
    scanf("%d", &new_student.id);
    printf("Enter student name: ");
    scanf("%s", new_student.name);
    printf("Enter student age: ");
    scanf("%d", &new_student.age);
    printf("Enter student GPA: ");
    scanf("%f", &new_student.gpa);
    students[num_students++] = new_student;
}

void list_students() {
    for (int i = 0; i < num_students; i++) {
        struct Student s = students[i];
        printf("%d\t%s\t%d\t%.2f\n", s.id, s.name, s.age, s.gpa);
    }
}

void search_student() {
    int id;
    printf("Enter student ID: ");
    scanf("%d", &id);
    for (int i = 0; i < num_students; i++) {
        struct Student s = students[i];
        if (s.id == id) {
            printf("%d\t%s\t%d\t%.2f\n", s.id, s.name, s.age, s.gpa);
            return;
        }
    }
    printf("Student not found.\n");
}

void delete_student() {
    int id;
    printf("Enter student ID: ");
    scanf("%d", &id);
    for (int i = 0; i < num_students; i++) {
        struct Student s = students[i];
        if (s.id == id) {
            for (int j = i; j < num_students - 1; j++) {
                students[j] = students[j+1];
            }
            num_students--;
            printf("Student deleted.\n");
            return;
        }
    }
    printf("Student not found.\n");
}

int main() {
    while (1) {
        printf("Enter a command (add, list, search, delete, quit): ");
        char command[10];
        scanf("%s", command);
        if (strcmp(command, "add") == 0) {
            add_student();
        } else if (strcmp(command, "list") == 0) {
            list_students();
        } else if (strcmp(command, "search") == 0) {
            search_student();
        } else if (strcmp(command, "delete") == 0) {
            delete_student();
        } else if (strcmp(command, "quit") == 0) {
            return 0;
        } else {
            printf("Invalid command.\n");
        }
    }
}

这个学生管理系统可以添加、列出、搜索和删除学生。它使用了一个结构体来表示学生，以及一个数组来存储所有学生的信息。用户可以通过命令行界面来输入不同的命令来操作学生信息。