//乘客节点 typedef struct CustomerNode { char name[10];//客户姓名 int clientTickets;//客户订票量 char identification[20];//客户身份证号码 int rank;//座位等级 CustomerNode *next; } CustomerNode, *CusLinkList; //候补队列中的节点 typedef struct WaitPassenger { char name[10];//姓名 char identification[20]; //身份证 int preTickets;//预定的票量 struct WaitPassenger *next; } WaitQNode, *PWait; //候补队列 typedef struct Queue { PWait front;//等候替补客户名单域的头指针 PWait rear;//等候替补客户名单域的尾指针 } LinkQueue; //封装乘客的姓名和订票量和身份证 //用于候补客户出队时把关键字返回 typedef struct NameAndNumAndID { char name[10];//姓名 char identification[20]; //身份证号码 int num;//订票量 } NameAndNumAndID; //车次节点 typedef struct Flight { char startPoint[20];//起点站名 char destination[20];//终点站名 char flightCodeID[20];//车次ID（相当于主键） char planeNum[20];//列车号 char day[20];//出发日期（星期几） int totalTickets;//乘员定额(总票数) int left;//总余票量 int leftEconomicTicket; //二等座剩余量 int leftBusinessTicket; //一等座剩余量 Flight *next; CusLinkList cusLinkList;//乘员名单域，指向乘员名单链表的头指针 LinkQueue waitQueue1;//二等座候补，等候替补的客户名单域，指向一个队列 LinkQueue waitQueue2;//一等座候补，等候替补的客户名单域，指向一个队列 } Flight, FlightNode, *PFlight; //定义全局指针变量pFlight，车次链表的头指针 Flight *pFlight; 用c语言实现该结构体的文件读写操作并给出具体代码

文件读操作：

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

typedef struct CustomerNode {
    char name[10];
    int clientTickets;
    char identification[20];
    int rank;
    struct CustomerNode *next;
} CustomerNode, *CusLinkList;

typedef struct WaitPassenger {
    char name[10];
    char identification[20];
    int preTickets;
    struct WaitPassenger *next;
} WaitQNode, *PWait;

typedef struct Queue {
    PWait front;
    PWait rear;
} LinkQueue;

typedef struct NameAndNumAndID {
    char name[10];
    char identification[20];
    int num;
} NameAndNumAndID;

typedef struct Flight {
    char startPoint[20];
    char destination[20];
    char flightCodeID[20];
    char planeNum[20];
    char day[20];
    int totalTickets;
    int left;
    int leftEconomicTicket;
    int leftBusinessTicket;
    struct Flight *next;
    CusLinkList cusLinkList;
    LinkQueue waitQueue1;
    LinkQueue waitQueue2;
} Flight, FlightNode, *PFlight;

PFlight pFlight;

void readFromFile() {
    FILE *fp = fopen("flights.dat", "rb");
    if (fp == NULL) {
        return;
    }

    PFlight currFlight = NULL;
    while (!feof(fp)) {
        PFlight newFlight = (PFlight)malloc(sizeof(Flight));
        memset(newFlight, 0, sizeof(Flight));

        fread(newFlight, sizeof(Flight), 1, fp);
        if (newFlight->flightCodeID[0] == '\0') {
            free(newFlight);
            break;
        }

        newFlight->cusLinkList = NULL;
        newFlight->waitQueue1.front = NULL;
        newFlight->waitQueue1.rear = NULL;
        newFlight->waitQueue2.front = NULL;
        newFlight->waitQueue2.rear = NULL;

        if (pFlight == NULL) {
            pFlight = newFlight;
            currFlight = pFlight;
        } else {
            currFlight->next = newFlight;
            currFlight = currFlight->next;
        }
    }

    fclose(fp);
}

文件写操作：

void saveToFile() {
    FILE *fp = fopen("flights.dat", "wb");
    if (fp == NULL) {
        return;
    }

    PFlight currFlight = pFlight;
    while (currFlight != NULL) {
        fwrite(currFlight, sizeof(Flight), 1, fp);

        currFlight = currFlight->next;
    }

    FlightNode sentinel;
    memset(&sentinel, 0, sizeof(FlightNode));
    fwrite(&sentinel, sizeof(FlightNode), 1, fp);

    fclose(fp);
}

以上代码只是一个示例，具体实现可能需要根据实际的需求进行修改。