用c语言编写一个车票管理系统

好的，下面是一个简单的班次信息管理系统的代码示例，可以根据您的需求进行修改和完善：

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

#define MAX_NUM 100 // 最大班次数
#define MAX_STR 50 // 最大字符串长度

typedef struct {
    int id; // 班次号
    char departure[MAX_STR]; // 发车时间
    char start[MAX_STR]; // 起点站
    char end[MAX_STR]; // 终点站
    int time; // 行车时间（单位：分钟）
    int capacity; // 额定载客量
    int booked; // 已定票人数
} Schedule;

Schedule schedules[MAX_NUM]; // 班次数组
int num_schedules = 0; // 班次数目

// 从文件中读取班次信息
void load_schedules() {
    FILE *fp = fopen("schedules.txt", "r");
    if (fp == NULL) {
        num_schedules = 0;
        return;
    }
    fscanf(fp, "%d", &num_schedules);
    for (int i = 0; i < num_schedules; i++) {
        fscanf(fp, "%d %s %s %s %d %d %d", &schedules[i].id, schedules[i].departure,
               schedules[i].start, schedules[i].end, &schedules[i].time,
               &schedules[i].capacity, &schedules[i].booked);
    }
    fclose(fp);
}

// 将班次信息写入文件
void save_schedules() {
    FILE *fp = fopen("schedules.txt", "w");
    fprintf(fp, "%d\n", num_schedules);
    for (int i = 0; i < num_schedules; i++) {
        fprintf(fp, "%d %s %s %s %d %d %d\n", schedules[i].id, schedules[i].departure,
                schedules[i].start, schedules[i].end, schedules[i].time,
                schedules[i].capacity, schedules[i].booked);
    }
    fclose(fp);
}

// 添加新的班次信息
void add_schedule() {
    if (num_schedules >= MAX_NUM) {
        printf("Error: too many schedules!\n");
        return;
    }
    printf("Please input the new schedule information:\n");
    printf("id: ");
    scanf("%d", &schedules[num_schedules].id);
    printf("departure: ");
    scanf("%s", schedules[num_schedules].departure);
    printf("start: ");
    scanf("%s", schedules[num_schedules].start);
    printf("end: ");
    scanf("%s", schedules[num_schedules].end);
    printf("time: ");
    scanf("%d", &schedules[num_schedules].time);
    printf("capacity: ");
    scanf("%d", &schedules[num_schedules].capacity);
    schedules[num_schedules].booked = 0;
    num_schedules++;
    save_schedules();
    printf("New schedule added successfully!\n");
}

// 显示所有班次信息
void show_schedules() {
    printf("%-5s %-10s %-10s %-10s %-10s %-10s %-10s\n", "id", "departure", "start", "end", "time", "capacity", "booked");
    for (int i = 0; i < num_schedules; i++) {
        printf("%-5d %-10s %-10s %-10s %-10d %-10d %-10d", schedules[i].id, schedules[i].departure,
               schedules[i].start, schedules[i].end, schedules[i].time,
               schedules[i].capacity, schedules[i].booked);
        time_t now;
        time(&now);
        struct tm *tm_now = localtime(&now);
        char str_now[MAX_STR];
        strftime(str_now, MAX_STR, "%H:%M", tm_now);
        if (strcmp(schedules[i].departure, str_now) <= 0) {
            printf(" (This schedule has already departed)");
        }
        printf("\n");
    }
}

// 根据起点和终点查询班次信息
void query_schedule() {
    char start[MAX_STR], end[MAX_STR];
    printf("Please input the start and end stations:\n");
    printf("start: ");
    scanf("%s", start);
    printf("end: ");
    scanf("%s", end);
    printf("%-5s %-10s %-10s %-10s %-10s %-10s %-10s\n", "id", "departure", "start", "end", "time", "capacity", "booked");
    for (int i = 0; i < num_schedules; i++) {
        if (strcmp(schedules[i].start, start) == 0 && strcmp(schedules[i].end, end) == 0) {
            printf("%-5d %-10s %-10s %-10s %-10d %-10d %-10d\n", schedules[i].id, schedules[i].departure,
                   schedules[i].start, schedules[i].end, schedules[i].time,
                   schedules[i].capacity, schedules[i].booked);
        }
    }
}

int main() {
    load_schedules();
    while (1) {
        printf("\nPlease select the operation:\n");
        printf("1. Add a new schedule\n");
        printf("2. Show all schedules\n");
        printf("3. Query schedule by start and end stations\n");
        printf("4. Exit\n");
        int op;
        scanf("%d", &op);
        switch (op) {
            case 1:
                add_schedule();
                break;
            case 2:
                show_schedules();
                break;
            case 3:
                query_schedule();
                break;
            case 4:
                return 0;
            default:
                printf("Error: invalid operation!\n");
        }
    }
    return 0;
}

该程序使用结构体存储班次信息，可以进行添加、浏览、查询等操作。班次信息保存在文件`schedules.txt`中，程序运行时会自动读入文件内容。在显示班次信息时，如果当前系统时间超过了某个班次的发车时间，则会提示该班次已经发出。