关于C语言文件存储问题

问一下这个为什么没有保存到文件

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

#define PERSON_MAXNUM 100
#define PERSONNOTICKET_MAX 10
#define MAX_SIZE 10
int size = 0;
int personsize = 0;
int personnoticketsize = 0;

//定义航班信息结构体
typedef struct plane
{
    char id[10];
    char Start_Place[10];
    char End_Place[10];
    float price;
    int Buy_num;
    int Max_num;
    char time[20];
}Plane;

//定义乘客信息结构体
typedef struct Person
{
    int AirPlane_Num;
    char person_name[20];

}Person;




void home(Plane* p,Person* person, Person* person_noticket);//初始页面
void InitAirPlane(Plane** p);//初始化航班信息内存
void InputAirPlane(Plane* p);//输入航班信息
void CheckAirPlane(Plane* p);//查看航班信息
void DelAirPlane(Plane* p);//删除航班信息
void CheckAirPlaneOrder(Plane* p,Person* person);//查看航班订单
void PrintPerson(Plane* p, Person* person, int i);//打印航班乘客

void InitPerson(Person** person);//初始化乘客信息内存
void BookAirPlane(Plane* p, Person* person,Person* person_noticket);//预定航班
int CheckPerson(Plane* p, Person* person);//查看乘客订单信息
void ChangeAirPlane(Plane* p, Person* person);//改签
void ReturnTicket(Plane* p, Person* person);//退票


void PrintPerson(Plane* p, Person* person, int i);
void CheckPersonNoTicket(Plane* p, Person* person_noticket);//查看候补名单
///

void home(Plane* p, Person* person, Person* person_noticket)
{
    int a, i, j;
    printf("\n                             欢迎进入飞机票务系统                       \n");
    printf("\n                       您好，现在要确认您的身份！票务人员请按 1 ，旅客请按 0                        \n");
    printf("请选择：");
    scanf("%d", &a);
    //航班管理人员操作
    if (a == 1)
        do{
            printf("\n                   1.输入航班信息                   \n");
            printf("\n                   2.删除航班信息                   \n");
            printf("\n                   3.浏览航班信息                   \n");
            printf("\n                   4.浏览目前已订票信息                   \n");
            printf("\n                   5.查看候补名单                  \n");
            printf("\n                   0.退出                         \n");
            printf("请选择：");
            scanf("%d", &i);
            switch (i)
            {
                case 0: break;
                case 1:InputAirPlane(p);break;
                case 2:DelAirPlane(p);break;
                case 3:CheckAirPlane(p);break;
                case 4:CheckAirPlaneOrder(p, person); break;
                case 5:CheckPersonNoTicket(p, person_noticket); break;
                default:
                    printf("输入错误！\n");
                    break;
            }
        } while (i != 0);
    //乘客操作
    if (a == 0)
        do{

            printf("\n                        1.订票                        \n");
            printf("\n                        2.改签                        \n");
            printf("\n                        3.退票                        \n");
            printf("\n                        4.浏览航班信息                        \n");
            printf("\n                        5.查询个人订票信息                        \n");
            printf("\n                        0.退出                        \n");
            printf("请选择：");
            scanf("%d", &j);
            switch (j)
            {
                case 0:break;
                case 1:BookAirPlane(p, person,person_noticket);break;
                case 2:ChangeAirPlane(p, person);break;
                case 3:ReturnTicket(p, person);break;
                case 4:CheckAirPlane(p);break;
                case 5:CheckPerson(p, person); break;
            }
        } while (j != 0);
}

//初始化
void InitAirPlane(Plane** p)
{
    assert(p);

    //申请空间
    *p = (Plane*)malloc(sizeof(Plane)*MAX_SIZE);
    if (NULL==*p)
    {
        printf("开辟空间失败！\n");
        return;
    }
    (*p)->Buy_num=0;
}
//输入航班信息
void InputAirPlane(Plane* p)
{
    if (size <= MAX_SIZE)
    {
        printf("航班编号：%d\n", size);
        printf("输入航班ID:");
        scanf("%s", (p+size)->id);
        printf("输入始发地：");
        scanf("%s", (p +size)->Start_Place);
        printf("输入目的地：");
        scanf("%s", (p +size)->End_Place);
        printf("输入航班起飞时间：");
        scanf("%s", (p +size)->time);
        printf("输入价格：");
        scanf("%f", &(p +size)->price);
        printf("输入航班可乘坐最大人数：");
        scanf("%d", &(p +size)->Max_num);
            FILE *fp;
        char ch;
        int i;
        if((fp=fopen("D:\c++\plant.txt","wb+"))==NULL){
        printf("文件打开失败！");
        exit(1);
        }
        for(i=0;i<size;i++,size++)
        fprintf(fp,"%d%s%s%d%d%d",(p+size)->id,(p+size)->Start_Place,(p+size)->End_Place,(p+size)->time,(p+size)->price,(p+size)->Max_num);
        rewind(fp);
        fscanf(fp,"%d%s%s%d%d%d",(p+size)->id,(p+size)->Start_Place,(p+size)->End_Place,(p+size)->time,(p+size)->price,(p+size)->Max_num);
        fclose(fp);
        do
        {
            printf("目前卖出机票数量：");
            scanf("%d", &(p +size)->Buy_num);
            if ((p+size)->Buy_num > (p+size)->Max_num)
            {
                printf("输入已卖出机票数量错误！\n");
                printf("请重新输入！\n\n");
            }
        } while ((p+size)->Buy_num > (p+size)->Max_num);
        size++;
        printf("添加航班信息完成！\n\n");
    }
    else
    {
        printf("内存已满！\n");
        return;
    }
}

//浏览航班信息
void CheckAirPlane(Plane* p)
{
    int i = 0;
    printf("目前在售的航班信息：\n\n");
    for (i=0; i<size;i++)
    {
        printf("航班编号：%d\n", i);
        printf("ID:%s\n", (p+i)->id);
        printf("始发地：%s\n", (p + i)->Start_Place);
        printf("目的地:%s\n", (p + i)->End_Place);
        printf("起飞时间：%s\n", (p + i)->time);
        printf("机票价格：%2f\n", (p + i)->price);
        printf("剩余机票：%d\n", ((p + i)->Max_num - (p + i)->Buy_num) );
        printf("\n");

    }
}

//删除航班信息
void DelAirPlane(Plane* p)
{
    int j = 0;
    int i = -1;
    assert(p);
    printf("请输入要删除的航班编号：");
    scanf("%d", &i);
    for (j=i; j<size;j++)
    {
        strcpy((p + j)->id, (p + j + 1)->id);
        strcpy((p + j)->Start_Place, (p + j + 1)->Start_Place);
        strcpy((p + j)->End_Place, (p + j)->End_Place);
        strcpy((p + j)->time, (p + j + 1)->time);
        (p + j)->price = (p + j + 1)->price;
        (p + j)->Max_num = (p + j + 1)->Max_num;
        (p + j)->Buy_num = (p + j + 1)->Buy_num;
    }
    size--;
}

//初始化订票信息
void InitPerson(Person** person)
{
    assert(person);
    *person = (Person*)malloc(sizeof(Person)*PERSON_MAXNUM);
    if (NULL == *person)
    {
        printf("开辟空间失败！\n");
        return;
    }
}

//订票
void BookAirPlane(Plane* p, Person* person, Person* person_noticket)
{
    int i = -1;
    CheckAirPlane(p);
    printf("请选择你要预定的航班编号：");
    scanf("%d", &i);
    if ((p + i)->Max_num == (p + i)->Buy_num)
    {
        printf("对不起，该航班机票已售完！\n");
        printf("请输入您的姓名（我们将把您添加进候补名单）：");
        scanf("%s", (person_noticket+personnoticketsize)->person_name);
        (person_noticket+personnoticketsize)->AirPlane_Num = i;
        personnoticketsize++;
        printf("添加候补名单成功！\n\n");
        return;
    }
    else
    {
        if (personsize > PERSON_MAXNUM)
        {
            printf("存储容量不足！\n");
            return;
        }
        printf("请输入姓名：");
        scanf("%s", (person+personsize)->person_name);
        (person+personsize)->AirPlane_Num = i;
        personsize++;
        (p + i)->Buy_num++;
        printf("预定成功！\n");
    }

}

//查看个人订票信息
int CheckPerson(Plane* p, Person* person)
{
    int flag = 0;
    int i = 0;
    char _name[20] = { 0 };
    printf("请输入您的姓名：");
    scanf("%s", &_name);
    printf("您的个人订票信息：\n\n");
    for (i=0;i<personsize;i++)
    {
        if (0 == strcmp(_name, (person + i)->person_name))
        {
            flag = 1;
            printf("订单编号：%d\n", i);
            printf("姓名：%s\n", (person + i)->person_name);
            printf("航班编号：%d\n", (person + i)->AirPlane_Num);
            printf("航班ID:%s\n", (p + (person + i)->AirPlane_Num)->id);
            printf("始发地：%s\n", (p + (person + i)->AirPlane_Num)->Start_Place);
            printf("目的地：%s\n", (p + (person + i)->AirPlane_Num)->End_Place);
            printf("起飞时间:%s\n", (p + (person + i)->AirPlane_Num)->time);
            printf("机票价格：%f\n", (p + (person + i)->AirPlane_Num)->price);
            printf("\n");
        }
    }
    if (0 == flag)
    {
        printf("未找到该乘客订票信息！\n");
        return 0;
    }
    return 1;
}

//改签
void ChangeAirPlane(Plane* p, Person* person)
{
    int i = -1;
    int j = -1;
    if (0 == CheckPerson(p, person))
    {
        return;
    }
    printf("请输入要改签的订单编号：");
    printf("\n");
    scanf("%d", &i);
    (p + i)->Buy_num--;
    CheckAirPlane(p);
    do
    {
        printf("请输入要改签的航班编号：");
        scanf("%d", &j);
        if ((p + j)->Buy_num >= (p + j)->Max_num)
        {
            printf("该次航班已满员，请重新选择！\n");
        }
    } while ((p + j)->Buy_num >= (p + j)->Max_num);
    (person + i)->AirPlane_Num = j;
    (p + j)->Buy_num++;
    printf("改签成功！\n\n");
}


//删除订单
void ReturnTicket(Plane* p, Person* person)
{
    int i = -1;
    int j = 0;
    CheckPerson(p, person);
    printf("请输入要删除的订单编号：");
    scanf("%d", &i);
    for (j=i; j<personsize;j++)
    {
        (person + j)->AirPlane_Num = (person + j + 1)->AirPlane_Num;
        strcpy((person + j)->person_name, (person + j + 1)->person_name);
    }
    printf("退票成功！\n");
}


//查看目前订票信息
void CheckAirPlaneOrder(Plane* p, Person* person)
{
    int i = -1;
    for (i=0; i<size;i++)
    {
        printf("航班编号：%d\n", i);
        printf("ID:%s\n", (p + i)->id);
        printf("始发地：%s\n", (p + i)->Start_Place);
        printf("目的地:%s\n", (p + i)->End_Place);
        printf("起飞时间：%s\n", (p + i)->time);
        printf("机票价格：%2f\n", (p + i)->price);
        printf("剩余机票：%d\n", ((p + i)->Max_num - (p + i)->Buy_num));
        printf("买票人信息："); PrintPerson(p,person, i);
    }
}
void PrintPerson(Plane* p, Person* person,int i)
{
    int ticket_num = 0;
    int j = 0;
    for (j=0;j <personsize;j++)
    {
        if ((person + j)->AirPlane_Num == i)
        {
            printf("%s ,", (person + j)->person_name);
            ticket_num++;
        }
    }
    printf("\n\n");
}

//候补名单初始化
void InitPersonNoTicket(Person** person_noticket)
{
    assert(person_noticket);
    *person_noticket = (Person*)malloc(sizeof(Person)*PERSONNOTICKET_MAX);
    if (NULL == *person_noticket)
    {
        printf("开辟空间失败！\n");
        return;
    }
}

//查看候补名单
void CheckPersonNoTicket(Plane* p, Person* person_noticket)
{
    int i = 0;
    printf("候补名单：\n\n");
    if (0==personnoticketsize)
    {
        printf("候补名单为空！\n\n");
        return;
    }
    for (i=0; i<personnoticketsize;i++)
    {
        printf("姓名：%s\n", (person_noticket + i)->person_name);
        printf("所需要航班编号：%d\n", (person_noticket + i)->AirPlane_Num);
        printf("航班ID:%s\n", (p + ((person_noticket + i)->AirPlane_Num))->id);
        printf("始发地：%s\n", ((p + ((person_noticket + i)->AirPlane_Num))->Start_Place));
        printf("目的地：%s\n", (p + ((person_noticket + i)->AirPlane_Num))->End_Place);
    }
}
//主函数
int main()
{
    Plane* p=NULL;
    Person* person=NULL;
    Person* person_noticket = NULL;
    InitPersonNoTicket(&person_noticket);
    InitAirPlane(&p);
    InitPerson(&person);
    while (1)
    {
        home(p, person, person_noticket);
    }
    system("pause");
    return 0;
}

代码第145行，路径不正确。想想你学习的C语言语法，反斜杠是什么意思？是转义符。如果不要特殊转义就要反斜杠字符本身，那么也需要对反斜杠本身做转义。
正确写法：

D:\\C++\\plant.txt

更新：CSDN自带转义我是没想到的……我的原答案只写了两个相邻反斜杠，结果给我转义了。现在应该显示正常了。