用c语言写图书馆座位预约管理系统

以下是一个用 C 语言实现的简单图书馆座位预约管理系统示例：

#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <time.h>

#define MAX_SEATS 100 // 最多可预约的座位数
#define MAX_RESERVATIONS 1000 // 最多预约记录数

struct Reservation {
    int seat; // 座位号
    char date[11]; // 预约日期，格式为 YYYY-MM-DD
    char time[6]; // 预约时间，格式为 HH:MM
};

int seats[MAX_SEATS]; // 可预约的座位号
struct Reservation reservations[MAX_RESERVATIONS]; // 预约记录数组
int num_reservations = 0; // 预约记录数

bool isValidSeat(int seat) {
    for (int i = 0; i < MAX_SEATS; i++) {
        if (seats[i] == seat) {
            return true;
        }
    }
    return false;
}

bool isValidDate(char *date) {
    struct tm tm;
    if (strptime(date, "%Y-%m-%d", &tm) == NULL) {
        return false;
    }
    time_t t = mktime(&tm);
    return t != -1;
}

bool isValidTime(char *time) {
    struct tm tm;
    if (strptime(time, "%H:%M", &tm) == NULL) {
        return false;
    }
    return true;
}

bool isReserved(int seat, char *date, char *time) {
    for (int i = 0; i < num_reservations; i++) {
        struct Reservation r = reservations[i];
        if (r.seat == seat && strcmp(r.date, date) == 0) {
            if (strcmp(r.time, time) == 0) {
                return true;
            }
        }
    }
    return false;
}

void reserveSeat(int seat, char *date, char *time) {
    struct Reservation r;
    r.seat = seat;
    strcpy(r.date, date);
    strcpy(r.time, time);
    reservations[num_reservations] = r;
    num_reservations++;
    printf("预约成功！\n");
}

void cancelReservation(int index) {
    for (int i = index; i < num_reservations - 1; i++) {
        reservations[i] = reservations[i + 1];
    }
    num_reservations--;
    printf("取消预约成功！\n");
}

void printReservations() {
    printf("预约记录如下：\n");
    for (int i = 0; i < num_reservations; i++) {
        struct Reservation r = reservations[i];
        printf("座位号：%d，预约日期：%s，预约时间：%s\n", r.seat, r.date, r.time);
    }
}

int main() {
    // 初始化可预约的座位号
    for (int i = 0; i < 5; i++) {
        seats[i] = i + 1;
    }
    
    while (true) {
        printf("请输入操作代码（1：预约座位，2：取消预约，3：查询预约记录，0：退出）：");
        int code;
        scanf("%d", &code);
        switch (code) {
            case 1:
                printf("请输入座位号：");
                int seat;
                scanf("%d", &seat);
                if (!isValidSeat(seat)) {
                    printf("座位号错误！\n");
                    break;
                }
                printf("请输入预约日期（格式为 YYYY-MM-DD）：");
                char date[11];
                scanf("%s", date);
                if (!isValidDate(date)) {
                    printf("日期格式错误！\n");
                    break;
                }
                printf("请输入预约时间（格式为 HH:MM）：");
                char time[6];
                scanf("%s", time);
                if (!isValidTime(time)) {
                    printf("时间格式错误！\n");
                    break;
                }
                if (isReserved(seat, date, time)) {
                    printf("该时间段已被预约！\n");
                    break;
                }
                reserveSeat(seat, date, time);
                break;
            case 2:
                printf("请输入要取消的预约记录编号：");
                int index;
                scanf("%d", &index);
                if (index < 1 || index > num_reservations) {
                    printf("预约记录编号错误！\n");
                    break;
                }
                cancelReservation(index - 1);
                break;
            case 3:
                printReservations();
                break;
            case 0:
                return 0;
            default:
                printf("操作代码错误！\n");
                break;
        }
    }
}

该代码实现了一个简单的图书馆座位预约管理系统，运行后可以按照提示进行座位预约、预约取消和预约记录查询等操作。需要注意的是，该代码只实现了最基本的功能，实际应用中还需要考虑更多的情况，例如用户身份认证、座位状态查询等。