用c语言写个火车票订票系统

好的，下面是一个简单的火车票订票系统的C语言代码示例：

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

#define MAX_TRAIN_NUM 100
#define MAX_SEAT_NUM 100

struct Train {
    char name[50];
    int seats[MAX_SEAT_NUM];
};

struct Train trains[MAX_TRAIN_NUM];
int trainNum = 0;

void addTrain(char* name, int* seats, int seatNum) {
    if (trainNum >= MAX_TRAIN_NUM) {
        printf("The maximum number of trains has been reached.\n");
        return;
    }
    struct Train train;
    strcpy(train.name, name);
    for (int i = 0; i < seatNum; i++) {
        train.seats[i] = seats[i];
    }
    trains[trainNum] = train;
    trainNum++;
    printf("Train added successfully.\n");
}

void bookTicket(int trainIndex, int seatNum) {
    if (trainIndex < 0 || trainIndex >= trainNum) {
        printf("Invalid train index.\n");
        return;
    }
    struct Train train = trains[trainIndex];
    if (seatNum < 0 || seatNum >= MAX_SEAT_NUM) {
        printf("Invalid seat number.\n");
        return;
    }
    if (train.seats[seatNum] == 0) {
        printf("The seat is already booked.\n");
        return;
    }
    train.seats[seatNum] = 0;
    trains[trainIndex] = train;
    printf("Ticket booked successfully.\n");
}

void showTrainInfo(int trainIndex) {
    if (trainIndex < 0 || trainIndex >= trainNum) {
        printf("Invalid train index.\n");
        return;
    }
    struct Train train = trains[trainIndex];
    printf("Train Name: %s\n", train.name);
    printf("Total Seats: %d\n", sizeof(train.seats) / sizeof(int));
    printf("Available Seats:\n");
    for (int i = 0; i < sizeof(train.seats) / sizeof(int); i++) {
        if (train.seats[i] != 0) {
            printf("%d ", i+1);
        }
    }
    printf("\n");
}

void showAllTrains() {
    printf("Total Trains: %d\n", trainNum);
    printf("Train List:\n");
    for (int i = 0; i < trainNum; i++) {
        printf("%d. %s\n", i+1, trains[i].name);
    }
}

int main() {
    int choice;
    do {
        printf("\nWelcome to Train Ticket Booking System\n");
        printf("1. Add Train\n");
        printf("2. Book Ticket\n");
        printf("3. Show Train Info\n");
        printf("4. Show All Trains\n");
        printf("5. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1: {
                char name[50];
                int seatNum;
                printf("Enter train name: ");
                scanf("%s", name);
                printf("Enter number of seats: ");
                scanf("%d", &seatNum);
                int seats[MAX_SEAT_NUM];
                for (int i = 0; i < seatNum; i++) {
                    seats[i] = i + 1;
                }
                addTrain(name, seats, seatNum);
                break;
            }
            case 2: {
                int trainIndex, seatNum;
                printf("Enter train index: ");
                scanf("%d", &trainIndex);
                printf("Enter seat number: ");
                scanf("%d", &seatNum);
                bookTicket(trainIndex - 1, seatNum - 1);
                break;
            }
            case 3: {
                int trainIndex;
                printf("Enter train index: ");
                scanf("%d", &trainIndex);
                showTrainInfo(trainIndex - 1);
                break;
            }
            case 4: {
                showAllTrains();
                break;
            }
            case 5: {
                exit(0);
            }
            default: {
                printf("Invalid choice.\n");
                break;
            }
        }
    } while (1);
    return 0;
}

这个程序中，我们定义了一个结构体 `Train`，其中包含火车名称和座位数组。然后我们使用数组来存储火车信息，可以添加火车、订票、查看火车信息和列出所有火车的列表。