c语言代码，图书馆自习位预约系统更加精确

以下是一个简单的C语言代码，可以实现图书馆自习位预约系统的更加精确：

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

#define MAX_SEATS 100
#define MAX_TIME 24

bool seats[MAX_TIME][MAX_SEATS];

void displayMenu();
void reserveSeat();
void cancelReservation();
void displaySeats();

int main() {
    int choice;
    do {
        displayMenu();
        scanf("%d", &choice);
        switch(choice) {
            case 1:
                reserveSeat();
                break;
            case 2:
                cancelReservation();
                break;
            case 3:
                displaySeats();
                break;
            case 4:
                printf("Thank you for using our reservation system!\n");
                break;
            default:
                printf("Invalid choice! Please try again.\n");
                break;
        }
    } while (choice != 4);
    return 0;
}

void displayMenu() {
    printf("\nWelcome to the Library Seat Reservation System!\n");
    printf("1. Reserve a seat\n");
    printf("2. Cancel a reservation\n");
    printf("3. Display available seats\n");
    printf("4. Exit\n");
    printf("Enter your choice (1-4): ");
}

void reserveSeat() {
    int time, seat;
    printf("\nEnter the desired time slot (0-23): ");
    scanf("%d", &time);
    if (time < 0 || time >= MAX_TIME) {
        printf("Invalid time slot! Please try again.\n");
        return;
    }
    printf("Enter the desired seat number (1-%d): ", MAX_SEATS);
    scanf("%d", &seat);
    if (seat < 1 || seat > MAX_SEATS) {
        printf("Invalid seat number! Please try again.\n");
        return;
    }
    if (seats[time][seat-1]) {
        printf("Sorry, this seat is already reserved! Please choose another one.\n");
        return;
    }
    seats[time][seat-1] = true;
    printf("Seat %d at time slot %d has been reserved!\n", seat, time);
}

void cancelReservation() {
    int time, seat;
    printf("\nEnter the time slot (0-23) of the reservation to be cancelled: ");
    scanf("%d", &time);
    if (time < 0 || time >= MAX_TIME) {
        printf("Invalid time slot! Please try again.\n");
        return;
    }
    printf("Enter the seat number (1-%d) of the reservation to be cancelled: ", MAX_SEATS);
    scanf("%d", &seat);
    if (seat < 1 || seat > MAX_SEATS) {
        printf("Invalid seat number! Please try again.\n");
        return;
    }
    if (!seats[time][seat-1]) {
        printf("Sorry, this seat was not reserved at this time slot!\n");
        return;
    }
    seats[time][seat-1] = false;
    printf("Reservation for seat %d at time slot %d has been cancelled!\n", seat, time);
}

void displaySeats() {
    printf("\nAvailable seats:\n");
    printf("Time Slot:\t");
    for (int i = 0; i < MAX_TIME; i++) {
        printf("%d\t", i);
    }
    printf("\n");
    for (int j = 0; j < MAX_SEATS; j++) {
        printf("Seat %d:\t", j+1);
        for (int i = 0; i < MAX_TIME; i++) {
            printf("%c\t", seats[i][j] ? 'X' : '_');
        }
        printf("\n");
    }
}

这个程序使用了一个二维布尔数组`seats`，表示每个时间和座位是否已被预约。`reserveSeat()`函数用于预约座位，`cancelReservation()`函数用于取消预约，`displaySeats()`函数用于显示所有可用的座位。