//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

以下是该结构体的文件读写操作的具体代码：

1. 写入文件

void writeToFile() {
    FILE *fp = fopen("data.txt", "wb");
    if(fp == NULL) {
        printf("文件打开失败！");
        return;
    }
    Flight *currentFlight = pFlight;
    while(currentFlight != NULL) {
        fwrite(currentFlight, sizeof(Flight), 1, fp);
        CustomerNode *currentCustomer = currentFlight->cusLinkList;
        while(currentCustomer != NULL) {
            fwrite(currentCustomer, sizeof(CustomerNode), 1, fp);
            currentCustomer = currentCustomer->next;
        }
        PWait currentWait = currentFlight->waitQueue1.front;
        while(currentWait != NULL) {
            fwrite(currentWait, sizeof(WaitQNode), 1, fp);
            currentWait = currentWait->next;
        }
        currentWait = currentFlight->waitQueue2.front;
        while(currentWait != NULL) {
            fwrite(currentWait, sizeof(WaitQNode), 1, fp);
            currentWait = currentWait->next;
        }
        currentFlight = currentFlight->next;
    }
    fclose(fp);
}

2. 从文件中读取

void readFromFile() {
    FILE *fp = fopen("data.txt", "rb");
    if(fp == NULL) {
        printf("文件打开失败！");
        return;
    }
    pFlight = NULL;
    Flight *currentFlight = NULL;
    while(!feof(fp)) {
        Flight *newFlight = (Flight*)malloc(sizeof(Flight));
        fread(newFlight, sizeof(Flight), 1, fp);
        newFlight->cusLinkList = NULL;
        newFlight->waitQueue1.front = NULL;
        newFlight->waitQueue1.rear = NULL;
        newFlight->waitQueue2.front = NULL;
        newFlight->waitQueue2.rear = NULL;
        if(pFlight == NULL) {
            pFlight = newFlight;
            currentFlight = newFlight;
        } else {
            currentFlight->next = newFlight;
            currentFlight = currentFlight->next;
        }
        for(int i=0; i<newFlight->totalTickets; i++) {
            CustomerNode *newCustomer = (CustomerNode*)malloc(sizeof(CustomerNode));
            fread(newCustomer, sizeof(CustomerNode), 1, fp);
            newCustomer->next = NULL;
            if(newCustomer->rank == 1) {
                newFlight->leftBusinessTicket--;
            } else if(newCustomer->rank == 2) {
                newFlight->leftEconomicTicket--;
            }
            if(newFlight->cusLinkList == NULL) {
                newFlight->cusLinkList = newCustomer;
            } else {
                CustomerNode *currentCustomer = newFlight->cusLinkList;
                while(currentCustomer->next != NULL) {
                    currentCustomer = currentCustomer->next;
                }
                currentCustomer->next = newCustomer;
            }
        }
        while(1) {
            WaitQNode *newWait = (WaitQNode*)malloc(sizeof(WaitQNode));
            fread(newWait, sizeof(WaitQNode), 1, fp);
            if(newWait->name[0] == '\0') {
                free(newWait);
                break;
            }
            newWait->next = NULL;
            if(newFlight->waitQueue1.rear == NULL) {
                newFlight->waitQueue1.front = newWait;
                newFlight->waitQueue1.rear = newWait;
            } else {
                newFlight->waitQueue1.rear->next = newWait;
                newFlight->waitQueue1.rear = newWait;
            }
        }
        while(1) {
            WaitQNode *newWait = (WaitQNode*)malloc(sizeof(WaitQNode));
            fread(newWait, sizeof(WaitQNode), 1, fp);
            if(newWait->name[0] == '\0') {
                free(newWait);
                break;
            }
            newWait->next = NULL;
            if(newFlight->waitQueue2.rear == NULL) {
                newFlight->waitQueue2.front = newWait;
                newFlight->waitQueue2.rear = newWait;
            } else {
                newFlight->waitQueue2.rear->next = newWait;
                newFlight->waitQueue2.rear = newWait;
            }
        }
    }
    fclose(fp);
}