飞机订票系统课设c语言代码

飞机订票系统是一个比较复杂的课程设计，需要涉及到多种知识点，包括C语言的基本语法、文件读写、结构体、指针等。下面是一个简单的飞机订票系统的C语言代码，仅供参考：

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

#define MAX_SEATS 100

struct flight {
    char id[10];
    char origin[20];
    char destination[20];
    int seats[MAX_SEATS];
    int num_seats;
};

struct flight flights[10];
int num_flights = 0;

void read_flights() {
    FILE *fp = fopen("flights.txt", "r");
    if (fp == NULL) {
        printf("Error opening flights.txt\n");
        exit(1);
    }
    while (!feof(fp)) {
        fscanf(fp, "%s %s %s", flights[num_flights].id, flights[num_flights].origin, flights[num_flights].destination);
        for (int i = 0; i < MAX_SEATS; i++) {
            fscanf(fp, "%d", &flights[num_flights].seats[i]);
            if (flights[num_flights].seats[i] == 0) {
                flights[num_flights].num_seats = i;
                break;
            }
        }
        num_flights++;
    }
    fclose(fp);
}

void write_flights() {
    FILE *fp = fopen("flights.txt", "w");
    if (fp == NULL) {
        printf("Error opening flights.txt\n");
        exit(1);
    }
    for (int i = 0; i < num_flights; i++) {
        fprintf(fp, "%s %s %s", flights[i].id, flights[i].origin, flights[i].destination);
        for (int j = 0; j < flights[i].num_seats; j++) {
            fprintf(fp, " %d", flights[i].seats[j]);
        }
        fprintf(fp, "\n");
    }
    fclose(fp);
}

void print_flights() {
    for (int i = 0; i < num_flights; i++) {
        printf("%d. %s (%s to %s)\n", i+1, flights[i].id, flights[i].origin, flights[i].destination);
    }
}

void print_seats(int flight_num) {
    printf("Seats available on flight %s:\n", flights[flight_num-1].id);
    for (int i = 0; i < flights[flight_num-1].num_seats; i++) {
        printf("%d ", flights[flight_num-1].seats[i]);
    }
    printf("\n");
}

void book_seat(int flight_num, int seat_num) {
    flights[flight_num-1].seats[seat_num-1] = 1;
    flights[flight_num-1].num_seats--;
}

int main() {
    read_flights();
    int choice;
    while (1) {
        printf("1. List available flights\n");
        printf("2. Book a seat\n");
        printf("3. Quit\n");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                print_flights();
                break;
            case 2:
                print_flights();
                int flight_num, seat_num;
                printf("Enter flight number: ");
                scanf("%d", &flight_num);
                print_seats(flight_num);
                printf("Enter seat number: ");
                scanf("%d", &seat_num);
                book_seat(flight_num, seat_num);
                write_flights();
                printf("Seat booked!\n");
                break;
            case 3:
                return 0;
            default:
                printf("Invalid choice.\n");
                break;
        }
    }
}

以上代码实现了一个基本的飞机订票系统，能够读取和写入航班信息，列出可用航班，预订座位等功能。如果需要更完整的代码或者有其他问题，请及时提出相关问题。