C语言学生管理系统代码

C语言学生管理系统代码是一个用C语言编写的程序，用于管理学生信息和成绩。以下是一个简单的C语言学生管理系统代码示例：

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

#define MAX_STUDENT_NUM 100

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

struct student students[MAX_STUDENT_NUM];
int student_num = 0;

void add_student() {
    if (student_num >= MAX_STUDENT_NUM) {
        printf("Error: student list is full.\n");
        return;
    }

    struct student new_student;
    printf("Please enter the name of the student: ");
    scanf("%s", new_student.name);
    printf("Please enter the ID of the student: ");
    scanf("%d", &new_student.id);
    printf("Please enter the score of the student: ");
    scanf("%f", &new_student.score);

    students[student_num] = new_student;
    student_num++;

    printf("Student added successfully.\n");
}

void print_student(struct student s) {
    printf("Name: %s, ID: %d, Score: %.2f\n", s.name, s.id, s.score);
}

void print_all_students() {
    if (student_num == 0) {
        printf("No students found.\n");
        return;
    }

    printf("All students:\n");
    for (int i = 0; i < student_num; i++) {
        print_student(students[i]);
    }
}

void search_student() {
    if (student_num == 0) {
        printf("No students found.\n");
        return;
    }

    int search_id;
    printf("Please enter the ID of the student you want to search: ");
    scanf("%d", &search_id);

    for (int i = 0; i < student_num; i++) {
        if (students[i].id == search_id) {
            print_student(students[i]);
            return;
        }
    }

    printf("No student found with ID %d.\n", search_id);
}

void delete_student() {
    if (student_num == 0) {
        printf("No students found.\n");
        return;
    }

    int delete_id;
    printf("Please enter the ID of the student you want to delete: ");
    scanf("%d", &delete_id);

    for (int i = 0; i < student_num; i++) {
        if (students[i].id == delete_id) {
            for (int j = i; j < student_num - 1; j++) {
                students[j] = students[j + 1];
            }
            student_num--;
            printf("Student deleted successfully.\n");
            return;
        }
    }

    printf("No student found with ID %d.\n", delete_id);
}

int main() {
    int choice;

    while (1) {
        printf("**************************\n");
        printf("**\t学生管理系统\t**\n");
        printf("**************************\n");
        printf("**\t1.录入学生信息\t**\n");
        printf("**\t2.查找学生信息\t**\n");
        printf("**\t3.删除学生信息\t**\n");
        printf("**\t4.显示所有学生\t**\n");
        printf("**\t0.退出系统\t**\n");
        printf("**************************\n");
        printf("Please enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                search_student();
                break;
            case 3:
                delete_student();
                break;
            case 4:
                print_all_students();
                break;
            case 0:
                printf("Goodbye!\n");
                exit(0);
            default:
                printf("Invalid choice.\n");
                break;
        }
    }

    return 0;
}

该程序包含以下功能：

1.录入学生信息
2.查找学生信息
3.删除学生信息
4.显示所有学生

用户可以根据自己的需要选择相应的功能。该程序使用结构体存储学生信息，可以存储最多100个学生的信息。