学生管理系统源代码C语言

以下是一个简单的学生管理系统的源代码，使用C语言编写：

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

#define MAX_STUDENTS 100

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

void print_menu();
int add_student(student students[], int count);
void display_students(student students[], int count);
void search_student(student students[], int count);
void modify_student(student students[], int count);
void delete_student(student students[], int count);

int main() {
    student students[MAX_STUDENTS];
    int count = 0;
    int choice;

    while (1) {
        print_menu();
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                count = add_student(students, count);
                break;
            case 2:
                display_students(students, count);
                break;
            case 3:
                search_student(students, count);
                break;
            case 4:
                modify_student(students, count);
                break;
            case 5:
                delete_student(students, count);
                break;
            case 6:
                exit(0);
            default:
                printf("Invalid choice. Please try again.\n");
                break;
        }
    }

    return 0;
}

void print_menu() {
    printf("\n===== Student Management System =====\n");
    printf("1. Add student\n");
    printf("2. Display all students\n");
    printf("3. Search student\n");
    printf("4. Modify student\n");
    printf("5. Delete student\n");
    printf("6. Exit\n");
    printf("Enter your choice: ");
}

int add_student(student students[], int count) {
    if (count >= MAX_STUDENTS) {
        printf("Maximum number of students reached.\n");
        return count;
    }

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

    students[count] = new_student;
    count++;

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

void display_students(student students[], int count) {
    if (count == 0) {
        printf("No students to display.\n");
        return;
    }

    printf("Name\tScore\n");
    for (int i = 0; i < count; i++) {
        printf("%s\t%d\n", students[i].name, students[i].score);
    }
}

void search_student(student students[], int count) {
    if (count == 0) {
        printf("No students to search for.\n");
        return;
    }

    char search_name[20];
    printf("Enter student name to search: ");
    scanf("%s", search_name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, search_name) == 0) {
            printf("Student found. Score: %d\n", students[i].score);
            return;
        }
    }

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

void modify_student(student students[], int count) {
    if (count == 0) {
        printf("No students to modify.\n");
        return;
    }

    char modify_name[20];
    printf("Enter student name to modify: ");
    scanf("%s", modify_name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, modify_name) == 0) {
            printf("Enter new score: ");
            scanf("%d", &students[i].score);
            printf("Student modified successfully.\n");
            return;
        }
    }

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

void delete_student(student students[], int count) {
    if (count == 0) {
        printf("No students to delete.\n");
        return;
    }

    char delete_name[20];
    printf("Enter student name to delete: ");
    scanf("%s", delete_name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, delete_name) == 0) {
            for (int j = i; j < count - 1; j++) {
                students[j] = students[j + 1];
            }
            count--;
            printf("Student deleted successfully.\n");
            return;
        }
    }

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

这个学生管理系统支持添加、显示、搜索、修改和删除学生记录。在代码中使用了一个结构体`student`来存储学生的姓名和分数，并使用`typedef`定义了这个结构体的别名。同时，使用了一个预处理器常量`MAX_STUDENTS`来定义学生记录的最大数量。使用`switch`语句实现了菜单功能，用户可以根据提示输入数字来选择不同的操作。