用c语言写一个学生宿舍考勤代码

在C语言中编写一个简单的学生宿舍考勤系统代码，我们可以创建一个结构体表示学生信息，并设计函数来进行注册、签到和查询考勤记录。这里是一个简化的示例：

#include <stdio.h>
#include <stdlib.h>
#define MAX_STUDENTS 10

// 宿舍学生结构体
typedef struct {
    char name[50];
    int id;
    int attendance; // 初始假定签到次数为0
} Student;

// 学生列表
Student students[MAX_STUDENTS];

// 注册新学生
void register_student(char *name, int id) {
    if (students_count < MAX_STUDENTS) { // 检查列表是否满
        Student new_student = {name, id, 0};
        students[students_count] = new_student;
        printf("Student %s registered with ID %d\n", name, id);
        students_count++;
    } else {
        printf("List is full, cannot register.\n");
    }
}

// 签到
void check_in(int student_id) {
    for (int i = 0; i < students_count; i++) {
        if (students[i].id == student_id) {
            students[i].attendance++;
            printf("Student %s checked in (total attendances: %d)\n", students[i].name, students[i].attendance);
            break;
        }
    }
}

// 查询考勤
void query_attendance(int student_id) {
    for (int i = 0; i < students_count; i++) {
        if (students[i].id == student_id) {
            printf("Student %s has attended %d times\n", students[i].name, students[i].attendance);
            return;
        }
    }
    printf("Student not found.\n");
}

int main() {
    int choice;
    do {
        printf("\n--\n");
        printf("1. 注册新学生\n");
        printf("2. 签到\n");
        printf("3. 查询考勤\n");
        printf("4. 退出\n");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                char name[50];
                int id;
                printf("Enter student's name and ID: ");
                scanf("%s%d", name, &id);
                register_student(name, id);
                break;
            case 2:
                int student_id;
                printf("Enter student ID to sign in: ");
                scanf("%d", &student_id);
                check_in(student_id);
                break;
            case 3:
                int search_id;
                printf("Enter student ID to check attendance: ");
                scanf("%d", &search_id);
                query_attendance(search_id);
                break;
            case 4:
                printf("Exiting the system...\n");
                break;
            default:
                printf("Invalid option, please try again.\n");
        }
    } while (choice != 4); // 如果用户选择4，则退出循环

    return 0;
}