c++编写旅店信息管理系统

Question

在运行过程中Restaurant 文件出现乱码，不知该如何解决？
源代码如下：
#include #include #include #include #define MIN 1 //宏定义房间序号的最小值#define MAX 30 //宏定义房间序号的最大值#define LEN sizeof(struct Hotel) //用LEN代替结构体的"长度"char menu_select(); //函数声明 struct Hotel * regeist();void in_information(); void out_information(); void search_number(); void show_all(); void search_name();struct Hotel * change_change(); void change_save(struct Hotel *Q); void change(); void fire(); struct Hotel * fire_delet(); void fire_save(struct Hotel *Q);void check(int n);struct Hotel *load();struct Hotel //定义全局结构体变量{ int room_number; char name [20]; char sex[10]; char ID [20]; float paid[10]; int inyear ; int inmonth ; int inday ; struct Hotel *next ;};char menu_select () //定义menu_select函数，用来完成菜单功能{ char select ; printf ("\n\n--------------------------欢迎使用旅店信息管理系统---------------------------\n\n"); printf ("1.创建旅店信息\n2.查看旅店信息\n3.查看某一房间信息\n4.查看旅客信息\n"); printf ("5.查找某一旅客信息\n6.旅客入住\n7.旅客换房\n8.旅客退房\n9.退出管理系统\n"); printf ("\n-----------------------------------------------------------------------------\n"); select=getch(); return select ; //返回select的值}void in_information() //定义in_information函数，完成创建旅店信息功能{ FILE *fp; //定义文件指针 char ch,choice[2]; printf ("\n确定创建新的旅店信息吗?该操作将清除现有的旅店信息！(y/n):"); scanf ("%s",choice); if((strcmp(choice,"Y")!=0)&&(strcmp(choice,"y")!=0)) return; if ((fp=fopen("information.txt","w"))==NULL) { printf ("无法打开文件！\n"); getch(); exit(0); } printf("\n请创建新的旅店信息(以#结束)：\n"); //提示输入旅店信息 ch=getchar(); while (ch!='#') //判断是否结束输入信息 { fputc(ch,fp); ch=getchar(); } fclose (fp); printf ("\n创建信息成功！"); //提示创建信息成功}void out_information() //定义out_information函数，完成查看旅店信息功能{ FILE *fp; char ch ; if ((fp=fopen("information.txt","r"))==NULL) { printf ("无法打开文件！\n"); getch(); exit(0); } ch=fgetc(fp); system("cls"); printf("\n\n\t\t\t旅店信息介绍： (若没有信息请返回创建)"); //开始输出旅店信息 printf ("\n-------------------------------------------------------------------------------\n\n\t"); while (ch!=EOF) { putchar(ch); ch=fgetc(fp); } fclose(fp); //文件用后一定要关闭 }struct Hotel * regeist () //定义regeist函数，用来完成旅客入住功能{ FILE *fp ; //定义文件指针 char ch[2] ; int number ; struct Hotel *head,*p1,*p2 ; head=NULL ; if((fp=fopen("resturant.txt","a+"))==NULL) { printf ("无法打开文件！\n"); getch(); exit(0); } do { p1=(struct Hotel *)malloc(LEN); //开辟新的节点 p2=(struct Hotel *)malloc(LEN); if ((p1==NULL)||(p2==NULL)) { printf ("动态内存分配失败！\n"); //如果动态内存分配失败，返回失败信息 getch(); exit(0); } printf ("\n请登记入住信息！\n"); //开始登记旅客信息 printf ("roomnumber(%d~%d)：",MIN,MAX); scanf ("%d",&number); if (numberMAX) //假设该旅店只有1~30间房间 { printf ("\a\nError ！"); return 0; } check (number); //检查该房间是否已经有旅客入住了 p1->room_number=number ; //在该房间没有旅客时，登记入住 printf ("name:\t"); scanf ("%s",&p1->name); printf ("sex：\t"); scanf ("%s",&p1->sex); printf ("ID：\t"); scanf ("%s",&p1->ID); printf ("paid：\t"); scanf ("%s",&p1->paid); printf ("date(年月日空格隔开)："); scanf ("%d %d %d",&p1->inyear,&p1->inmonth,&p1->inday); p1->next=NULL ; if(head==NULL) //将输入的信息保存到链表 { head=p1; p2=p1 ; } else { p2->next=p1; p2=p1 ; } fwrite(p2,LEN,1,fp); //将链表信息保存到磁盘文件 printf ("\n请选择是否继续登记信息 (y/n):"); //判断是否继续登记旅客信息 scanf ("%s",ch); if((strcmp(ch,"Y")!=0)&&(strcmp(ch,"y")!=0)) { fclose (fp); printf ("\n登记旅客入住信息成功！"); return(0); } }while(1) ; return (head) ; //登记完成后返回头链表指针}void search_number () //定义search_number函数，用来完成查看某一房间的信息{ char ch[2] ; int room_number ; //room_number用来储存需要查询的roomnumber struct Hotel *head, *pa ; head=load(); printf ("\n请输入需要查看的房间序号：(%d~%d)：",MIN,MAX); scanf ("%d",&room_number); pa= head->next; if (room_numberMAX) //Error时，容错判断 { printf ("\a\nError！"); return ; } for(;;) //for语句循环 { if (pa) { if(room_number==pa->room_number) //遍历链表，如果找到相应信息，则输出 { printf ("\n"); printf ("roomnumber:\t%d",pa->room_number); printf ("\n"); printf ("name：\t\t%s",pa->name); printf ("\n"); printf ("sex：\t\t%s",pa->sex); printf ("\n"); printf ("ID:\t\t%s",pa->ID); printf ("\n"); printf ("paid：\t\t%s",pa->paid); printf ("\n"); printf ("%d %d %d",pa->inyear,pa->inmonth,pa->inday); printf ("\n"); printf ("\n请选择是否继续查看信息(y/n):\n"); //提示是否继续查看 scanf ("%s",ch); if((strcmp(ch,"Y")!=0)&&(strcmp(ch,"y")!=0)) { getch(); return; } else { printf ("\n请输入需要查看的房间序号：(%d~%d)：",MIN,MAX); scanf ("%d",&room_number); pa= head->next; if (room_numberMAX) { printf ("\a Error ！"); return; } continue ; //跳出该层循环 } } pa = pa->next; //时pa的下一个指针赋值给pa } else { printf ("\n该房间还没有旅客入住"); //如果该房间还没有旅客入住，返回相应信息 return; } }}void show_all() //定义是show_all函数，用来显示所有旅客信息{ struct Hotel *head, *pa ; head=load(); pa= head->next; printf ("\n所有入住旅客的信息如下：\n"); while (pa) //显示所有的旅客信息 { printf ("\n"); printf ("roomnumber:\t%d",pa->room_number); printf ("\n"); printf ("name：\t\t%s",pa->name); printf ("\n"); printf ("sex：\t\t%s",pa->sex); printf ("\n"); printf ("ID:\t\t%s",pa->ID); printf ("\n"); printf ("paid：\t\t%s",pa->paid); printf ("\n"); printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); printf ("\n"); pa = pa->next; }}void search_name () //定义search_name函数，用来完成查看某一旅客的信息{ char ch[2] ; char inname[20] ; //用数组inname[20]来储存需要查询的旅客name struct Hotel *head, *pa ; head=load(); printf ("\n请输入需要查看的旅客姓名："); scanf ("%s",inname); pa= head->next; for (;;) { if (pa) { if(strcmp(inname,pa->name)==0) { printf ("\n"); printf ("roomnumber:\t%d",pa->room_number); printf ("\n"); printf ("name：\t\t%s",pa->name); printf ("\n"); printf ("sex：\t\t%s",pa->sex); printf ("\n"); printf ("ID:\t\t%s",pa->ID); printf ("\n"); printf ("paid：\t\t%s",pa->paid); printf ("\n"); printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); printf ("\n"); printf ("\n请选择是否继续查看信息(y/n):\n"); scanf ("%s",ch); if((strcmp(ch,"Y")!=0)&&(strcmp(ch,"y")!=0)) { getch(); return; } else { printf ("\n请输入需要查看的旅客姓名："); scanf ("%s",inname); pa= head->next; continue ; } } pa = pa->next; } else { printf ("\n没有查到该旅客的信息"); //没有此人时，返回相应信息 return ; } }}void change(){ struct Hotel *M ; M=change_change(); change_save(M);}struct Hotel * change_change (){ int room_number ; //room_number用来储存需要换房的roomnumber int newroom_number ; struct Hotel *head, *pa ; head=load(); printf ("\n请输入需要换房的房间序号：(%d~%d)：",MIN,MAX); scanf ("%d",&room_number); if (room_numberMAX) //容错判断 { printf ("\aError！"); exit(0) ; } pa= head->next; for (;;) //for语句循环 { if (pa) { if(room_number==pa->room_number) { printf ("\n"); printf ("roomnumber:\t%d",pa->room_number); printf ("\n"); printf ("name：\t\t%s",pa->name); printf ("\n"); printf ("sex：\t\t%s",pa->sex); printf ("\n"); printf ("ID:\t\t%s",pa->ID); printf ("\n"); printf ("paid：\t\t%s",pa->paid); printf ("\n"); printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); printf ("\n"); printf ("\n请输入需要换到的房间序号：(%d~%d):",MIN,MAX); scanf ("%d",&newroom_number); if (newroom_numberMAX) { printf ("\aError！"); exit(0); } check (newroom_number); pa->room_number=newroom_number ; break ; } pa = pa->next; } else { printf ("\n该房间还没有旅客入住！\n"); exit(0); } } return (head) ;}void change_save(struct Hotel *Q){ FILE *fp ; struct Hotel *L ; L=Q->next ; if((fp=fopen("resturant.txt","wb"))==NULL) { printf ("无法打开文件！\n"); getch(); exit(0); } while(L) { fwrite(L,LEN,1,fp); L=L->next ; } fclose(fp); printf ("\n换房成功！");}void fire(){ struct Hotel *M ; M=fire_delet(); fire_save(M);}struct Hotel * fire_delet(){ char inname[20] ; //用数组inname[20]来储存需要退房旅客name struct Hotel *head, *previous,*pa ; head=load(); previous=(struct Hotel *)malloc(LEN); //开辟新的节点 if (previous==NULL) { printf ("动态内存分配失败！\n"); //如果动态内存分配失败，返回失败信息 getch(); exit(0); } printf ("\n请输入需要退房的旅客姓名："); scanf ("%s",inname); pa=head->next ; for(;;) { if (pa) { if(strcmp(inname,pa->name)==0) { printf ("\n"); printf ("roomnumber:\t%d",pa->room_number); printf ("\n"); printf ("name：\t\t%s",pa->name); printf ("\n"); printf ("sex：\t\t%s",pa->sex); printf ("\n"); printf ("ID:\t\t%s",pa->ID); printf ("\n"); printf ("paid：\t\t%s",pa->paid); printf ("\n"); printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); printf ("\n"); if(pa==head) { head=pa->next; return head ; } else { previous=head ; while(previous->next != pa) //找到需要查找节点的前一个节点 previous=previous->next ; if (pa->next==NULL) previous->next=NULL ; else previous->next=pa->next ; break ; } } pa = pa->next; } else { printf ("\n没有查找到该旅客的信息！\n"); getch(); exit(0); } } return (head) ;}void fire_save(struct Hotel *Q){ FILE *fp ; struct Hotel *L ; L=Q->next ; if((fp=fopen("resturant.txt","wb"))==NULL) { printf ("无法打开文件！\n"); getch(); exit(0); } while(L) { fwrite(L,LEN,1,fp); L=L->next ; } fclose(fp); printf ("\n退房成功！");}void check(int n) //定义check函数，用来检查登记时房间是否已经有旅客入住{ FILE *fp ; struct Hotel *head, *pa,*pb, *s ; pa=(struct Hotel *)malloc(LEN); //开辟新的节点 pb=(struct Hotel *)malloc(LEN); s =(struct Hotel *)malloc(LEN); head = pb; if((pa==NULL)||(pb==NULL)||(s==NULL)) { printf ("内存分配失败！\n"); getch(); exit(0); } if((fp=fopen("resturant.txt","rb"))==NULL) { printf ("无法打开文件！\n"); getch(); exit(0); } while (fread (s,LEN,1,fp)) //读取当前的信息，并存到链表中 { pb->next = s; pb = s; s = (struct Hotel *)malloc(LEN); } pb->next =NULL; pa=head ;while (pa){ if (pa->room_number==n) { printf ("\n%d号房间已经有旅客入住了！\n",n); getch(); exit(0); } pa=pa->next ;}}struct Hotel *load() //定义load函数读取当前的信息，并存到链表中{ FILE *fp ; struct Hotel *head,*pb, *s ; pb=(struct Hotel *)malloc(LEN); //开辟新的节点 s =(struct Hotel *)malloc(LEN); if((pb==NULL)||(s==NULL)) { printf ("动态内存分配失败！\n"); getch(); exit(0); } if((fp=fopen("resturant.txt","rb"))==NULL) { printf ("无法打开文件！\n"); getch(); exit(0); } head = pb; while (fread (s,LEN,1,fp)) //读取当前的信息，并存到链表中 { pb->next = s; pb = s; s = (struct Hotel *)malloc(LEN); } pb->next =NULL; return head ; //返回链表的头指针}int main () //主函数部分，调用若干子函数完成相应的功能{ char choice ; do { choice=menu_select(); switch (choice) //switch 语句，选择判断 { case '1':in_information();break; case '2':out_information();break; case '3':search_number();break; case '4':show_all();break; case '5':search_name();break; case '6':regeist();break; case '7':change();break; case '8':fire();break; case '9':exit(0);break; //退出旅店信息管理系统 default :printf ("\aError ！");break ; //default 语句 } printf ("\n\n请按任意键继续 ！\n"); getch(); system("cls"); }while(1); return 0 ;}

Answer 1

运行了一下：的确出现乱码。
问题：
1 你写入的是二进制，不都是可读的字符。
2 写入的结构 hotel 没有初始化.
3 写入的指针不是可读的字符。
附整理的代码：

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

#define MIN 1 //宏定义房间序号的最小值
#define MAX 30 //宏定义房间序号的最大值
#define LEN sizeof(struct Hotel) 
//用LEN代替结构体的"长度"
char menu_select(); //函数声明 
struct Hotel * regeist();
void in_information(); 
void out_information(); 
void search_number(); 
void show_all(); 
void search_name();
struct Hotel * change_change(); 
void change_save(struct Hotel *Q); 
void change(); 
void fire(); 
struct Hotel * fire_delet(); 
void fire_save(struct Hotel *Q);
void check(int n);
struct Hotel *load();
struct Hotel //定义全局结构体变量
{ 
    int room_number; 
    char name [20]; 
    char sex[10]; 
    char ID [20]; 
    float paid[10]; 
    int inyear ; 
    int inmonth ; 
    int inday ; 
    struct Hotel *next ;
};
char menu_select () //定义menu_select函数，用来完成菜单功能
{ 
    char select ; 
    printf ("\n\n--------------------------欢迎使用旅店信息管理系统---------------------------\n\n"); 
    printf ("1.创建旅店信息\n2.查看旅店信息\n3.查看某一房间信息\n4.查看旅客信息\n"); 
    printf ("5.查找某一旅客信息\n6.旅客入住\n7.旅客换房\n8.旅客退房\n9.退出管理系统\n"); 
    printf ("\n-----------------------------------------------------------------------------\n"); 
    select=getch(); 
    return select ; //返回select的值
}
void in_information() //定义in_information函数，完成创建旅店信息功能
{ 
    FILE *fp; //定义文件指针 
    char ch,choice[2]; 
    printf ("\n确定创建新的旅店信息吗?该操作将清除现有的旅店信息！(y/n):"); 
    scanf ("%s",choice); 
    if((strcmp(choice,"Y")!=0)&&(strcmp(choice,"y")!=0)) 
        return; 
    if ((fp=fopen("information.txt","w"))==NULL) 
    { 
        printf ("无法打开文件！\n"); 
        getch(); exit(0); 
    } 
    printf("\n请创建新的旅店信息(以#结束)：\n"); 
    //提示输入旅店信息 
    ch=getchar(); 
    while (ch!='#') 
        //判断是否结束输入信息 
    { 
        fputc(ch,fp); 
        ch=getchar(); 
    } 
    fclose (fp); 
    printf ("\n创建信息成功！"); 
    //提示创建信息成功
}
void out_information() 
//定义out_information函数，完成查看旅店信息功能
{ 
    FILE *fp; 
    char ch ; 
    if ((fp=fopen("information.txt","r"))==NULL) 
    { 
        printf ("无法打开文件！\n"); 
        getch(); exit(0); 
    } 
    ch=fgetc(fp); 
    system("cls"); 
    printf("\n\n\t\t\t旅店信息介绍： (若没有信息请返回创建)"); 
    //开始输出旅店信息 
    printf ("\n-------------------------------------------------------------------------------\n\n\t"); 
    while (ch!=EOF) { 
        putchar(ch); 
        ch=fgetc(fp); 
    } 
    fclose(fp); //文件用后一定要关闭 
}
struct Hotel * regeist () 
    //定义regeist函数，用来完成旅客入住功能
{ 
    FILE *fp ; //定义文件指针 
    char ch[2] ; 
    int number ; 
    struct Hotel *head,*p1,*p2 ; 
    head=NULL ; 
    if((fp=fopen("resturant.txt","a+"))==NULL) 
    { 
        printf ("无法打开文件！\n"); 
        getch(); 
        exit(0);
    } 
    do 
    { 
        p1=(struct Hotel *)malloc(LEN); //开辟新的节点 
        memset(p1,0,sizeof(*p1));
        p2=(struct Hotel *)malloc(LEN); 
        memset(p2,0,sizeof(*p2));
        if ((p1==NULL)||(p2==NULL)) { 
            printf ("动态内存分配失败！\n"); //如果动态内存分配失败，返回失败信息 
            getch(); 
            exit(0);
        } 
        printf ("\n请登记入住信息！\n"); //开始登记旅客信息 
        printf ("roomnumber(%d~%d)：",MIN,MAX); 
        scanf ("%d",&number); 
        if (number>MAX) //假设该旅店只有1~30间房间 
        { 
            printf ("\a\nError ！"); 
            return 0; 
        } 
        check (number); //检查该房间是否已经有旅客入住了 
        p1->room_number=number ; //在该房间没有旅客时，登记入住 
        printf ("name:\t"); 
        scanf ("%s",&p1->name); 
        printf ("sex：\t"); 
        scanf ("%s",&p1->sex); 
        printf ("ID：\t"); 
        scanf ("%s",&p1->ID); 
        printf ("paid：\t"); 
        scanf ("%s",&p1->paid); 
        printf ("date(年月日空格隔开)："); 
        scanf ("%d %d %d",&p1->inyear,&p1->inmonth,&p1->inday); 
        p1->next=NULL ; 
        if(head==NULL) //将输入的信息保存到链表 
        { 
            head=p1; 
            p2=p1 ; 
        } 
        else { 
            p2->next=p1; 
            p2=p1 ; 
        } 
        fwrite(p2,LEN,1,fp); //将链表信息保存到磁盘文件 
        printf ("\n请选择是否继续登记信息 (y/n):"); //判断是否继续登记旅客信息 
        scanf ("%s",ch); 
        if((strcmp(ch,"Y")!=0)&&(strcmp(ch,"y")!=0)) 
        { 
            fclose (fp); 
            printf ("\n登记旅客入住信息成功！"); 
            return(0); 
        } 
    }while(1) ; 
    return (head) ; 
    //登记完成后返回头链表指针
}
void search_number () //定义search_number函数，用来完成查看某一房间的信息
{ 
    char ch[2] ; 
    int room_number ; //room_number用来储存需要查询的roomnumber 
    struct Hotel *head, *pa ; 
    head=load(); 
    printf ("\n请输入需要查看的房间序号：(%d~%d)：",MIN,MAX); 
    scanf ("%d",&room_number); 
    pa= head->next; 
    if (room_number>MAX) //Error时，容错判断 
    { 
        printf ("\a\nError！"); 
        return ; 
    } 
    for(;;) //for语句循环 
    { 
        if (pa) 
        { 
            if(room_number==pa->room_number) //遍历链表，如果找到相应信息，则输出 
            { 
                printf ("\n"); 
                printf ("roomnumber:\t%d",pa->room_number); 
                printf ("\n"); 
                printf ("name：\t\t%s",pa->name); 
                printf ("\n"); 
                printf ("sex：\t\t%s",pa->sex); 
                printf ("\n"); 
                printf ("ID:\t\t%s",pa->ID); 
                printf ("\n"); 
                printf ("paid：\t\t%s",pa->paid); 
                printf ("\n"); 
                printf ("%d %d %d",pa->inyear,pa->inmonth,pa->inday); 
                printf ("\n"); 
                printf ("\n请选择是否继续查看信息(y/n):\n"); //提示是否继续查看 
                scanf ("%s",ch); 
                if((strcmp(ch,"Y")!=0)&&(strcmp(ch,"y")!=0)) { 
                    getch(); return; 
                } 
                else { 
                    printf ("\n请输入需要查看的房间序号：(%d~%d)：",MIN,MAX); 
                    scanf ("%d",&room_number); pa= head->next; 
                    if (room_number>MAX) { 
                        printf ("\a Error ！"); 
                        return; 
                    } 
                    continue ; //跳出该层循环 
                } 
            } 
            pa = pa->next; //时pa的下一个指针赋值给pa 
        } 
        else { 
            printf ("\n该房间还没有旅客入住"); //如果该房间还没有旅客入住，返回相应信息 
            return; 
        } 
    }
}
void show_all() //定义是show_all函数，用来显示所有旅客信息
{ 
    struct Hotel *head, *pa ; head=load(); pa= head->next; printf ("\n所有入住旅客的信息如下：\n"); 
    while (pa) //显示所有的旅客信息 
    { 
        printf ("\n"); 
        printf ("roomnumber:\t%d",pa->room_number); 
        printf ("\n"); 
        printf ("name：\t\t%s",pa->name); 
        printf ("\n"); 
        printf ("sex：\t\t%s",pa->sex); 
        printf ("\n"); 
        printf ("ID:\t\t%s",pa->ID); 
        printf ("\n"); 
        printf ("paid：\t\t%s",pa->paid); 
        printf ("\n"); 
        printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); 
        printf ("\n"); 
        pa = pa->next; 
    }
}
void search_name () //定义search_name函数，用来完成查看某一旅客的信息
{ 
    char ch[2] ; char inname[20] ; //用数组inname[20]来储存需要查询的旅客name 
    struct Hotel *head, *pa ; head=load(); printf ("\n请输入需要查看的旅客姓名："); scanf ("%s",inname); pa= head->next; 
    for (;;) { 
        if (pa) { 
            if(strcmp(inname,pa->name)==0) 
            { 
                printf ("\n"); 
                printf ("roomnumber:\t%d",pa->room_number); 
                printf ("\n"); 
                printf ("name：\t\t%s",pa->name); 
                printf ("\n"); 
                printf ("sex：\t\t%s",pa->sex); 
                printf ("\n"); 
                printf ("ID:\t\t%s",pa->ID); 
                printf ("\n"); 
                printf ("paid：\t\t%s",pa->paid); 
                printf ("\n"); 
                printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); 
                printf ("\n"); 
                printf ("\n请选择是否继续查看信息(y/n):\n"); 
                scanf ("%s",ch); 
                if((strcmp(ch,"Y")!=0)&&(strcmp(ch,"y")!=0)) 
                { 
                    getch(); 
                    return; 
                } 
                else 
                { 
                    printf ("\n请输入需要查看的旅客姓名："); 
                    scanf ("%s",inname); 
                    pa= head->next; 
                    continue ; 
                } 
            } 
            pa = pa->next;
        } 
        else 
        { 
            printf ("\n没有查到该旅客的信息"); //没有此人时，返回相应信息 
            return ; 
        }
    }
}
void change(){ 
    struct Hotel *M ; 
    M=change_change(); 
    change_save(M);
}
struct Hotel * change_change ()
{ 
    int room_number ; //room_number用来储存需要换房的roomnumber 
    int newroom_number ; 
    struct Hotel *head, *pa ; 
    head=load(); 
    printf ("\n请输入需要换房的房间序号：(%d~%d)：",MIN,MAX); 
    scanf ("%d",&room_number); 
    if (room_number>MAX) //容错判断 
    { 
        printf ("\aError！"); 
        exit(0) ; 
    } 
    pa= head->next; 
    for (;;) //for语句循环 
    { 
        if (pa) 
        { 
            if(room_number==pa->room_number) 
            { 
                printf ("\n"); 
                printf ("roomnumber:\t%d",pa->room_number); 
                printf ("\n"); 
                printf ("name：\t\t%s",pa->name); 
                printf ("\n"); 
                printf ("sex：\t\t%s",pa->sex); 
                printf ("\n"); 
                printf ("ID:\t\t%s",pa->ID); 
                printf ("\n"); 
                printf ("paid：\t\t%s",pa->paid); 
                printf ("\n"); 
                printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); 
                printf ("\n"); 
                printf ("\n请输入需要换到的房间序号：(%d~%d):",MIN,MAX); 
                scanf ("%d",&newroom_number); 
                if (newroom_number>MAX) { 
                    printf ("\aError！"); 
                    exit(0); 
                } 
                check (newroom_number); 
                pa->room_number=newroom_number ; 
                break ; 
            } 
            pa = pa->next; 
        } 
        else 
        { 
            printf ("\n该房间还没有旅客入住！\n"); 
            exit(0); 
        } 
    } 
    return (head) ;
}
void change_save(struct Hotel *Q)
{ 
    FILE *fp ; struct Hotel *L ; L=Q->next ; 
    if((fp=fopen("resturant.txt","wb"))==NULL) { 
        printf ("无法打开文件！\n"); getch(); exit(0); 
    } 
    while(L) { 
        fwrite(L,LEN,1,fp); L=L->next ; 
    } 
    fclose(fp); 
    printf ("\n换房成功！");
}
void fire()
{ 
    struct Hotel *M ; M=fire_delet(); fire_save(M);
}
struct Hotel * fire_delet()
{ 
    char inname[20] ; //用数组inname[20]来储存需要退房旅客name 
    struct Hotel *head, *previous,*pa ; head=load(); previous=(struct Hotel *)malloc(LEN); //开辟新的节点 
    if (previous==NULL) { 
        printf ("动态内存分配失败！\n"); //如果动态内存分配失败，返回失败信息 
        getch(); 
        exit(0); 
    } 
    printf ("\n请输入需要退房的旅客姓名："); 
    scanf ("%s",inname); 
    pa=head->next ; 
    for(;;) { 
        if (pa) { 
            if(strcmp(inname,pa->name)==0) { 
                printf ("\n"); 
                printf ("roomnumber:\t%d",pa->room_number); 
                printf ("\n"); 
                printf ("name：\t\t%s",pa->name); 
                printf ("\n"); 
                printf ("sex：\t\t%s",pa->sex); 
                printf ("\n"); 
                printf ("ID:\t\t%s",pa->ID); 
                printf ("\n"); 
                printf ("paid：\t\t%s",pa->paid); 
                printf ("\n"); 
                printf ("date：\t\t%d %d %d",pa->inyear,pa->inmonth,pa->inday); 
                printf ("\n"); 
                if(pa==head) { head=pa->next; return head ; } 
                else { 
                    previous=head ; 
                    while(previous->next != pa) //找到需要查找节点的前一个节点 
                        previous=previous->next ; 
                    if (pa->next==NULL) 
                        previous->next=NULL ; 
                    else previous->next=pa->next ; 
                    break ; 
                } 
            } 
            pa = pa->next; 
        } 
        else { 
            printf ("\n没有查找到该旅客的信息！\n"); 
            getch(); 
            exit(0); 
        } 
    } 
    return (head) ;
}
void fire_save(struct Hotel *Q)
{ 
    FILE *fp ; struct Hotel *L ; L=Q->next ; 
    if((fp=fopen("resturant.txt","wb"))==NULL) { 
        printf ("无法打开文件！\n"); 
        getch(); 
        exit(0); 
    } 
    while(L) { 
        fwrite(L,LEN,1,fp); L=L->next ; 
    } 
    fclose(fp); 
    printf ("\n退房成功！");
}
void check(int n) //定义check函数，用来检查登记时房间是否已经有旅客入住
{ 
    FILE *fp ; 
    struct Hotel *head, *pa,*pb, *s ; 
    pa=(struct Hotel *)malloc(LEN); 
    //开辟新的节点 
    pb=(struct Hotel *)malloc(LEN); 
    s =(struct Hotel *)malloc(LEN); head = pb; 
    if((pa==NULL)||(pb==NULL)||(s==NULL)) { 
        printf ("内存分配失败！\n"); 
        getch(); 
        exit(0); 
    } 
    if((fp=fopen("resturant.txt","rb"))==NULL) 
    { 
        printf ("无法打开文件！\n"); 
        getch(); 
        exit(0); 
    } 
    while (fread (s,LEN,1,fp)) //读取当前的信息，并存到链表中 
    { 
        pb->next = s; pb = s; 
        s = (struct Hotel *)malloc(LEN); 
    } 
    pb->next =NULL; 
    pa=head ;
    while (pa){ 
        if (pa->room_number==n) { 
            printf ("\n%d号房间已经有旅客入住了！\n",n); getch(); exit(0); 
        } 
        pa=pa->next ;
    }
}
struct Hotel *load() //定义load函数读取当前的信息，并存到链表中
{ 
    FILE *fp ; 
    struct Hotel *head,*pb, *s ; 
    pb=(struct Hotel *)malloc(LEN); //开辟新的节点 
    s =(struct Hotel *)malloc(LEN); 
    if((pb==NULL)||(s==NULL)) { 
        printf ("动态内存分配失败！\n"); getch(); exit(0); 
    } 
    if((fp=fopen("resturant.txt","rb"))==NULL) { 
        printf ("无法打开文件！\n"); 
        getch(); 
        exit(0); 
    } 
    head = pb; 
    while (fread (s,LEN,1,fp)) //读取当前的信息，并存到链表中 
    { 
        pb->next = s; 
        pb = s; 
        s = (struct Hotel *)malloc(LEN); 
    }
    pb->next =NULL; 
    return head ; //返回链表的头指针
}
int main () //主函数部分，调用若干子函数完成相应的功能
{ 
    char choice ; 
    do 
    { 
        choice=menu_select(); 
        switch (choice) //switch 语句，选择判断 
        { 
        case '1':
            in_information();
            break; 
        case '2':
            out_information();
            break; 
        case '3':
            search_number();
            break; 
        case '4':
            show_all();
            break; 
        case '5':
            search_name();
            break; 
        case '6':
            regeist();
            break; 
        case '7':
            change();
            break; 
        case '8':
            fire();
            break; 
        case '9':
            exit(0);
            break; //退出旅店信息管理系统 
        default :
            printf ("\aError ！");
            break ; //default 语句 
        } 
        printf ("\n\n请按任意键继续 ！\n"); 
        getch(); 
        system("cls"); 
    }while(1); 
    return 0 ;
}