C语言编程错误不会修改

Microsoft Visual C++
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include"date.h"
#include"func.h"

void main ()
{
struct Nodehead,p;
int i,j,k;
head=(struct Node)malloc(sizeof(struct Node));
head->next=NULL;
char name[20];
char pwd[10];
printf("\n欢迎进入火车票管理系统*\n");
printf("\t\t 1.用户登录\n");
printf("\t\t 2.用户注册\n");
printf("\t\t 0.退出系统\n");
printf("请输入所选序号:");
scanf("%d",&k);
switch(k)
{
case 1:printf("请输入用户名:");
scanf("%s",name);
printf("请输入密码:");
scanf("%s",pwd);
if(check(name,pwd))
{
printf("密码正确.\n");
do
{
printf("\n\n\t\t欢迎进入火车票管理系统\n");
printf("\t\t 1.录入火车票信息\t\t 2.添加火车票信息\n");
printf("\t\t 3.修改火车票信息\t\t 4.删除火车票信息\n");
printf("\t\t 5.打印火车票信息\t\t 6.查询火车票信息\n");
printf("\t\t 7．统计火车票信息\t\t 8.火车票销售排行\n");
printf("\t\t 0.退出系统\n");
printf("请输入您要进入菜单的序号(0-8):");
scanf("%d",&i);
switch(i)
{
case 1:
printf("请录入火车票信息\n\n");
head=creat();
save(head);
head=read();
break;
case 2:
append ();
break ;
case 3:
printf("请输入您要修改的火车票的编号:\n");
scanf("%d",&j);
change(head,j);
save(head);
break ;
case 4:
head=read();
if(delete(head))
{
printf("已经正确删除!\n");
save(head);
}
else
printf("要删除的结点不存在!\n");
break;
case 5:
head=read();
print(head);
break ;
case 6:
printf("请输入您要查询火车票的编号（以0结束）:\n");
scanf("%d",&j);
{
p=find(head);
printf("编号 起点和终点 出发时间 车票价格 剩余票数：\n");
printf("%d %10s %5s %10d %6d\n",p->num,p->name,p->time,p->price,p->amount);
printf("请继续输入序号(以0结束):");
scanf("%d",&j);
}
break ;
case 7:
head=read();
count(head);
break;
case 8:
sort(head);
break ;
case 0:
printf("谢谢使用!");
break;
}
}
while(i!=0);
}
else
printf("密码错误或用户名不存在.\n");
break;
case 2:save_user();
break;
case 0:
break;
}
}

代码修改如下：
main.cpp

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

#include"func.h"

void main ()
{
    struct Node* head,*p;
    int i,j,k;
    char name[20];
    char pwd[10];

    head=(struct Node*)malloc(sizeof(struct Node));
    head->next=NULL;
    
    printf("\n*******************欢迎进入火车票管理系统*******************\n");
    printf("\t\t 1.用户登录\n");
    printf("\t\t 2.用户注册\n");
    printf("\t\t 0.退出系统\n");
    printf("请输入所选序号:");
    scanf("%d",&k);
    switch(k)
    {
    case 1:printf("请输入用户名:");
        scanf("%s",name);
        printf("请输入密码:");
        scanf("%s",pwd);
        if(check(name,pwd))
        {
            printf("密码正确.\n");
            do 
            {
                printf("\n\n\t\t**************欢迎进入火车票管理系统**************\n");
                printf("\t\t 1.录入火车票信息\t\t             2.添加火车票信息\n");
                printf("\t\t 3.修改火车票信息\t\t             4.删除火车票信息\n");
                printf("\t\t 5.打印火车票信息\t\t             6.查询火车票信息\n");
                printf("\t\t 7．统计火车票信息\t\t            8.火车票销售排行\n");
                printf("\t\t 0.退出系统\n");
                printf("请输入您要进入菜单的序号(0-8):");
                scanf("%d",&i);
                switch(i)
                {
                case 1:
                    printf("请录入火车票信息\n\n");
                    head=create();
                    save(head);
                    head=read();
                    break;
                case 2:
                    append ();
                    break ;
                case 3:
                    printf("请输入您要修改的火车票的编号:\n");
                    scanf("%d",&j);
                    change(head,j);
                    save(head);
                    break ;
                case 4:
                    head=read();
                    if(dele(head))
                    {
                        printf("已经正确删除!\n");
                        save(head);
                    }
                    else
                        printf("要删除的结点不存在!\n");
                    break;
                case 5:
                    head=read();
                    print(head); 
                    break ;
                case 6:
                    printf("请输入您要查询火车票的编号（以0结束）:\n");
                    scanf("%d",&j);
                    {
                        p=find(head);
                        printf("编号   起点和终点   出发时间   车票价格   剩余票数：\n");
                        printf("%d   %10s   %5s   %10d   %6d\n",p->num,p->name,p->time,p->price,p->amount);
                        printf("请继续输入序号(以0结束):");
                        scanf("%d",&j);
                    }
                    break ;
                case 7:
                    head=read();
                    count(head);
                    break;
                case 8:
                    sort(head); 
                    break ;
                case 0:
                    printf("*******************谢谢使用!*******************");
                    break;
                }
            }
            while(i!=0);
        }
        else
            printf("密码错误或用户名不存在.\n");
        break;
    case 2:save_user();
        break;
    case 0:
        break;
    }
}

date.h:

//date.h//




struct Node
{
    int num;
    char name[20];
    char time[20];
    int price;
    int amount;
    struct Node* next;
};

func.h

//func.h//
#include "date.h"

struct Node* create();
void save(struct Node*h);
struct Node*read ();
void print(struct Node*h);
struct Node*find(struct Node*h);
void change(struct Node* h,int k);
int dele(struct Node* h);
void append();
void count(struct Node*h);
void save_user();
int check(char *name,char *pwd);
void sort (struct Node*h);

func.c

//func.c//
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include "func.h"



struct Node* create()
{
    struct Node*head,*r,*s;
    int i=0;
    char choice;
    head=(struct Node*)malloc(sizeof(struct Node));
    head->next=NULL;
    r=head;
    do
    {
        s=(struct Node*)malloc(sizeof(struct Node));
        s->next=NULL;
        printf("请输入第％d种火车票的信息:n",++i);
        printf("请输入火车的编号:");
        scanf("%d",&s->num );
        printf("起点和终点：");
        scanf("%s",s->name);
        printf("出发时间：");
        scanf("%s",s->time);
        printf("车票价格：");
        scanf("%d",&s->price);
        printf("剩余数量:");
        scanf("%d",&s->amount);
        r->next=s;
        r=s;
        printf ("Continue?( Y / N )");
        scanf ("%s",&choice );
    }
    while (choice=='Y'||choice=='y');
    r->next=NULL;
    return(head);
}
//保存到1//
void save(struct Node* h)
{
    struct Node*s;
    FILE * fp ;
    char filename [10]="1.txt";
    fp=fopen("1.txt","wt");
    if(fp==NULL)
    {
        printf ("\n 写文件出错，按任意键退出!"); 
        getchar ();
        exit (1);
    }
    for (s=h->next;s!=NULL;s=s->next);
    fprintf(fp,"%d %s %s %d %d \n ",s->num, s->name,s->time,s->price,s->amount);
    getchar();
    fclose (fp);
}
//读取1//
struct Node*read ()
{
    struct Node*head ,*r,*s;
    FILE*fp ;
    char filename[10]="zl.txt ";
    fp=fopen ("1.txt","rt");
    if(fp==NULL)
    {
        printf ("读文件错误，按任意键退出!");
        getchar ();
        exit (1);
    }
    head=(struct Node*) malloc(sizeof(struct Node)); 
    head->next=NULL ;
    r=head ;
    while(!feof(fp))
    {
        s=(struct Node*)malloc(sizeof(struct Node));
        fscanf (fp,"%d %s %s %d %d",&s->num,s->name,s->time,&s->price,&s->amount);
        r->next=s;
    }
    r->next=NULL;
    fclose(fp);
    return head;
}
//输出//
void print(struct Node*h)
{
    struct Node * s ;
    printf ("\n火车票信息如下\n ");
    printf ("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
    printf ("编号  起点和终点   出发时间   车票价格   剩余票数:\n");
    for(s=h->next;s->next!=NULL;s=s->next)
    {
        printf ("%d   %10s   %5s   %10d   %6d\n",s->num,s->name,s->time,s->price,s->amount);
    }
}
//查询//
struct Node*find(struct Node*h)
{
    int i,j; 
    char s[20];
    printf ("\t\t   查询方法有以下几种: \n");
    printf ("\t\t   1.火车票编号\n");
    printf ("\t\t   2.起点和终点\n");
    printf ("\t\t   3.出发时间\n");
    printf ("\t\t   4.车票价格\n");
    printf ("\t\t   5.剩余票数\n");
    printf ("请输入您要查询的方法的序号:");
    scanf("%d",&i);
    switch (i)
    {
    case 1:printf("请输入你要查询火车票的编号:");
        scanf ("%d",&j);
        while(h->next!=NULL)
        {
            h=h->next;
            if(h->num==j)
                return h;
        }
        return NULL ;
        break ;
    case 2:printf("请输入您要查询火车票的起点和终点:");
        scanf("%s",s);
        while (h->next!=NULL)
        {
            h=h->next;
            if(strcmp(h->name,s)==0)
                return h ;
        }
        return NULL;
        break;
    case 3:printf("请输入您要查询火车票的时间:");
        scanf("%s",s);
        while(h->next!=NULL)
        {
            h=h->next;
            if(strcmp(h->time,s)==0)
                return h;
        }
        return NULL;
        break;
    case 4:printf("请输入你要查询火车票的价格:");
        scanf("%d",&j); 
        while(h->next!=NULL)
        {
            h=h->next ;
            if(h->price==j)
                return h ;
        }
        return NULL;
        break;
    case 5:printf("请输入你要查询火车票的剩余票数:");scanf("%d",&j);
        while(h->next!=NULL)
        {
            h=h->next;
            if(h->amount==j)
                return h;
        }
        return NULL ;
        break;
    }
}
//修改//
void change(struct Node*h,int k)
{
    int j;
    struct Node*p;
    p=find(h);
    printf ("----------------------------");
    printf ("\t   您要修改哪一项?\n");
    printf ("\t    1.火车编号\n");
    printf ("\t    2.起点和终点\n");
    printf ("\t    3.出发时间\n");
    printf ("\t    4.车票价格\n");
    printf ("\t    5.剰余票数\n");
    printf ("\t    0.退出系统\n");
    printf ("-------------------\n");
    printf ("请输入您要修改项的编号:"); 
    scanf ("%d",&j);
    switch (j)
    {
    case 1:
        printf ("修改后的火车编号:");
        scanf ("%d",&p->num);
        break;
    case 2:
        printf("修改后的起点和终点:");
        scanf ("%s",p->name);
        break;
    case 3:
        printf("修改后的出发时间:");
        scanf ("%s",p->time);
        break;
    case 4:
        printf("修改后的车票价格:");
        scanf ("%d",&p->price);
        break;
    case 5:
        printf("修改后的剩余票数:"); 
        scanf ("%d",&p->amount);
        break ;
    case 0:break;
    }
}
//删除//
int dele(struct Node *h)
{
    struct Node*p ;
    int j;
    printf("请输入您要删除的火车票的编号:"); 
    scanf ("%d",&j);
    p=h->next;
    if(p==NULL)
        return 0;
    while(p!=NULL)
    {
        if(p->num==j)
        {
            h->next=p->next;
            free ( p );
            return 1;
        }
        h=p;
        p=p->next;
    }
    return 0;
}
//添加//
void append ()
{
    struct Node *p;
    FILE*fp;
    fp=fopen("1.txt","at+"); 
    if(fp==NULL)
    {
        printf("写文件出错,按任意键返回.\n");
        getchar ();
        exit (1);
    }
    printf("请输入要添加的火车票的信息:火车编号,起点和终点,出发时间,车票价格,剩余票数:\n");
    scanf("%d%s%s%d%d",&p->num,p->name,p->time,&p->price,&p->amount);
    fprintf(fp,"%d %s %s %d %d\n",p->num,p->name,p->time,p->price,p->amount); 
    getchar();
    fclose(fp);
}
//统计//
void count(struct Node *h)
{
    int i,j,k,n=0;
    struct Node *s;
    s = h;
    
    printf ("******************************************************************************************************\n");
    printf ("\t\t    请选择您要统计项目的序号:\n");
    printf ("\t\t    1.车票价格\n");
    printf ("\t\t    2.剰余票数\n");
    printf ("\t\t    0.退出界面\n");
    scanf("%d",&i);
    switch(i)
    {
    case 1:
        printf ("请输入您要统计车票的价格的标准:");
        scanf ("%d",&j);
        printf ("\t\t请选择低于或高于标准:\n");
        printf ("\t\t1.价格低于%d的个数\n",j);
        printf ("\t\t2.价格高于%d的个数\n",j);
        scanf ("%d",&k);
        if(k==1)
        {
            for(s=h->next;s->next!=NULL;s=s->next)
                if(s->price<j)
                    n++;
            printf("车票价格低于%d的个数有%d个.\n",j,n);
        } 
        else
        {
            for(s=h->next;s->next!=NULL;s=s->next)
                if(s->price>j)
                    n++;
            printf("车票价格高于%d的个数有%d个.\n",j,n);
        }
        break;
    case 2:
        printf("请输入您要统计剩余票数的数量:");
        scanf("%d",&j);
        printf("\t\t请选择低于或高于所输票数:\n");
        printf("\t\t1.票数低于%d的个数\n",j);
        printf("\t\t2.票数高于%d的个数\n",j);
        scanf("%d",&k); 
        if(k==1)
        {
            for(s=h->next;s->next!=NULL;s=s->next)
                if(s->amount<j)
                    n++;
            printf("剰余票数低于%d的个数有%d个.\n",j,n);
        }
        else 
        {
            for(s=h->next;s->next!=NULL;s=s->next)
                if(s->amount>j)
                    n++;
            printf("剩余票数高于％d的个数有％d个.\n",j,n);
        }
        break;
    case 0:break;
    }
}
//用户注册//
void save_user()
{
    char file[10]="2.txt";
    FILE*fp ;
    char name[20];
    char pwd[10];
    fp=fopen("2.txt","at+"); 
    if(fp==NULL)
    {
        printf("\n写文件出错,按任意键退出.\n");
        getchar();
        exit(1);
    }
    printf("请输入用户名:");
    scanf("%s",name);
    printf("请输入密码:");
    scanf("%s",pwd);
    fprintf(fp,"%s%s\n",name,pwd);
    getchar();
    fclose(fp);
    printf("用户注册成功!\n");
}
//登陆//
int check(char* name,char* pwd)
{
    char name1[20];
    char pwd1[10];
    FILE*fp;
    char file[10]="2.txt";
    if((fp=fopen("2.txt","rt"))==NULL)
    {
        printf("读文件出错,按任意键退出!\n");
        getchar();
        exit(1);
    }
    while(!feof(fp))
    {
        fscanf(fp,"%s%s",name1,pwd1);
        if(strcmp(name1,name)==0&&strcmp(pwd1,pwd)==0)
            return 1;
    }
    return 0;
}

//排序//
void sort(struct Node*h)
{
    struct Node*s,*p,*m,*n;
    int t,t1,t2,t3;
    char s1[20]; 
    char s2[10];
    printf("车票价格由低到高排序如下:\n"); 
    for(s=h->next;s->next!=NULL;s=s->next)
        for(p=s->next;p->next!=NULL;p=p->next)
            if(s->price>p->price)
            {
                t1=s->num;s->num=p->num;p->num=t1;
                t2=s->price;s->price=p->price;p->price=t2;
                t3=s->amount;s->amount=p->amount;p->amount=t3;
                strcpy(s1,s->name);strcpy(s->name,p->name);strcpy(p->name,s1);
                strcpy(s2,s->time);strcpy(s->time,p->time);strcpy(p->time,s2);
            }
            print(h);
            printf("\n\n剩余车票数量由多到少排序如下:n");
            for(s=h->next;s->next!=NULL;s=s->next)
                for(p=s->next;p->next!=NULL;p=p->next)
                    if(s->amount<p->amount)
                    {
                        t1=s->num;s->num=p->num;p->num=t1;
                        t2=s->price;s->price=p->price;p->price=t2;
                        t3=s->amount;s->amount=p->amount;p->amount=t3;
                        strcpy(s1,s->name);strcpy(s->name,p->name);strcpy(p->name,s1);
                        strcpy(s2,s->time);strcpy(s->time,p->time);strcpy(p->time,s2);
                    }
                    print(h);
}

有啥错误提示啊？

scanf ("%s",&choice );改为
scanf ("%c",&choice );

1> 主体.c
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(14): error C2143: 语法错误 : 缺少“;”(在“类型”的前面)
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(15): error C2143: 语法错误 : 缺少“;”(在“类型”的前面)
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(25): error C2065: “name”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(27): error C2065: “pwd”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(28): error C2065: “name”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(28): error C2065: “pwd”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(45): warning C4013: “creat”未定义；假设外部返回 int
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\主体.c(45): warning C4047: “=”:“Node *”与“int”的间接级别不同
1> func.c
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(20): warning C4996: 'scanf': This function or variable may be unsafe. Consider using scanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
1> c:\program files\microsoft visual studio 10.0\vc\include\stdio.h(304) : 参见“scanf”的声明
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(22): warning C4996: 'scanf': This function or variable may be unsafe. Consider using scanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
1> c:\program files\microsoft visual studio 10.0\vc\include\stdio.h(304) : 参见“scanf”的声明

1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(256): error C2143: 语法错误 : 缺少“;”(在“类型”的前面)
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(262): error C2065: “i”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(263): error C2065: “i”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(267): error C2065: “j”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(269): error C2065: “j”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(270): error C2065: “j”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(271): error C2065: “k”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(272): error C2065: “k”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(275): error C2065: “j”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(276): error C2065: “n”: 未声明的标识符
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(353): warning C4047: “函数”:“const char *”与“char”的间接级别不同
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(353): warning C4024: “strcmp”: 形参和实参 2 的类型不同
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(353): warning C4047: “函数”:“const char *”与“char”的间接级别不同
1>c:\users\administrator\documents\visual studio 2010\projects\6\6\func.c(353): warning C4024: “strcmp”: 形参和实参 2 的类型不同

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include"date.h"
#include"func.h"


void main ()
 {
 struct Node*head,*p;
 int i,j,k;
 head=(struct Node*)malloc(sizeof(struct Node));
 head->next=NULL;
 char name[20];
 char pwd[10];
 printf("\n*******************欢迎进入火车票管理系统*******************\n");
 printf("\t\t 1.用户登录\n");
 printf("\t\t 2.用户注册\n");
 printf("\t\t 0.退出系统\n");
 printf("请输入所选序号:");
     scanf("%d",&k);
 switch(k)
 {
 case 1:printf("请输入用户名:");
 scanf("%s",name);
 printf("请输入密码:");
 scanf("%s",pwd);
 if(check(name,pwd))
 {
 printf("密码正确.\n");
 do 
 {
 printf("\n\n\t\t**************欢迎进入火车票管理系统**************\n");
 printf("\t\t 1.录入火车票信息\t\t             2.添加火车票信息\n");
 printf("\t\t 3.修改火车票信息\t\t             4.删除火车票信息\n");
 printf("\t\t 5.打印火车票信息\t\t             6.查询火车票信息\n");
 printf("\t\t 7．统计火车票信息\t\t            8.火车票销售排行\n");
 printf("\t\t 0.退出系统\n");
 printf("请输入您要进入菜单的序号(0-8):");
 scanf("%d",&i);
 switch(i)
 {
 case 1:
     printf("请录入火车票信息\n\n");
     head=creat();
     save(head);
     head=read();
     break;
 case 2:
     append ();
     break ;
 case 3:
     printf("请输入您要修改的火车票的编号:\n");
     scanf("%d",&j);
     change(head,j);
     save(head);
     break ;
 case 4:
     head=read();
     if(delete(head))
     {
         printf("已经正确删除!\n");
         save(head);
     }
     else
         printf("要删除的结点不存在!\n");
         break;
 case 5:
     head=read();
     print(head); 
     break ;
 case 6:
     printf("请输入您要查询火车票的编号（以0结束）:\n");
     scanf("%d",&j);
     {
     p=find(head);
     printf("编号   起点和终点   出发时间   车票价格   剩余票数：\n");
     printf("%d   %10s   %5s   %10d   %6d\n",p->num,p->name,p->time,p->price,p->amount);
     printf("请继续输入序号(以0结束):");
     scanf("%d",&j);
     }
     break ;
 case 7:
     head=read();
     count(head);
     break;
 case 8:
     sort(head); 
     break ;
 case 0:
     printf("*******************谢谢使用!*******************");
     break;
 }
 }
while(i!=0);
 }
 else
     printf("密码错误或用户名不存在.\n");
     break;
 case 2:save_user();
     break;
 case 0:
     break;
 }
 }

//date.h//
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
typedef struct Node
{
    int num;
    char name[20];
    char time[20];
    int price;
    int amount;
    struct Node*next;
}Node;

//func.h//
struct Node*create();
void save(struct Node*h);
struct Node*read ();
void print(struct Node*h);
struct Node*find(struct Node*h);
void change(struct Node*h,int k);
int delete(struct Node*h);
void append();
void count(struct Node*h);
void save_user();
int check(char name,char pwd);
void sort (struct Node*h);

//func.c//
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include"date.h"

struct Node*create()
{
    struct Node*head,*r,*s;
    int i=0;
    char choice;
    head=(struct Node*)malloc(sizeof(struct Node));
    head->next=NULL;
    r=head;
    do
    {
        s=(struct Node*)malloc(sizeof(struct Node));
        s->next=NULL;
        printf("请输入第％d种火车票的信息:n",++i);
        printf("请输入火车的编号:");
        scanf("%d",&s->num );
        printf("起点和终点：");
        scanf("%s",s->name);
        printf("出发时间：");
        scanf("%s",s->time);
        printf("车票价格：");
        scanf("%d",&s->price);
        printf("剩余数量:");
        scanf("%d",&s->amount);
        r->next=s;
        r=s;
        printf ("Continue?( Y / N )");
        scanf ("%s",&choice );
    }
        while (choice=='Y'||choice=='y');
        r->next=NULL;
        return(head);
}
//保存到1//
void save(struct Node*h)
{
    struct Node*s;
    FILE * fp ;
    char filename [10]="1.txt";
    fp=fopen("1.txt","wt");
    if(fp==NULL)
    {
    printf ("\n 写文件出错，按任意键退出!"); 
    getchar ();
    exit (1);
    }
 for (s=h->next;s!=NULL;s=s->next);
 printf(fp,"%d %s %s %d %d \n ",s->num, s->name,s->time,s->price,s->amount);
 getchar();
 fclose (fp);
 }

//读取1//
 struct Node*read ()
 {
 struct Node*head ,*r,*s;
 FILE*fp ;
 char filename[10]="zl.txt ";
 fp=fopen ("1.txt","rt");
 if(fp==NULL)
 {
   printf ("读文件错误，按任意键退出!");
   getchar ();
   exit (1);
 }
 head=(struct Node*) malloc(sizeof(struct Node)); 
 head->next=NULL ;
 r=head ;
 while(!feof(fp))
 {
   s=(struct Node*)malloc(sizeof(struct Node));
   fscanf (fp,"%d %s %s %d %d",&s->num,s->name,s->time,&s->price,&s->amount);
   r->next=s;

 }
 r->next=NULL;
 fclose(fp);
 return head;
 }

//输出//
 void print(struct Node*h)
 {
 struct Node * s ;
 printf ("\n火车票信息如下\n ");
  printf ("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
 printf ("编号  起点和终点   出发时间   车票价格   剩余票数:\n");
  for(s=h->next;s->next!=NULL;s=s->next)
  {
  printf ("%d   %10s   %5s   %10d   %6d\n",s->num,s->name,s->time,s->price,s->amount);
  }
 }

 //查询//
 struct Node*find(struct Node*h)
 {
 int i,j; 
 char s[20];
 printf ("\t\t   查询方法有以下几种: \n");
 printf ("\t\t   1.火车票编号\n");
 printf ("\t\t   2.起点和终点\n");
 printf ("\t\t   3.出发时间\n");
 printf ("\t\t   4.车票价格\n");
 printf ("\t\t   5.剩余票数\n");
 printf ("请输入您要查询的方法的序号:");
     scanf("%d",&i);
 switch (i)
 {
 case 1:printf("请输入你要查询火车票的编号:");
        scanf ("%d",&j);
 while(h->next!=NULL)
 {
      h=h->next;
      if(h->num==j)
        return h;
 }
 return NULL ;
 break ;
 case 2:printf("请输入您要查询火车票的起点和终点:");
     scanf("%s",s);
 while (h->next!=NULL)
 {
      h=h->next;
      if(strcmp(h->name,s)==0)
          return h ;
 }
 return NULL;
 break;
 case 3:printf("请输入您要查询火车票的时间:");
            scanf("%s",s);
 while(h->next!=NULL)
 {
      h=h->next;
      if(strcmp(h->time,s)==0)
      return h;
 }
 return NULL;
 break;
 case 4:printf("请输入你要查询火车票的价格:");
        scanf("%d",&j); 
 while(h->next!=NULL)
 {
      h=h->next ;
      if(h->price==j)
      return h ;
 }
 return NULL;
 break;
 case 5:printf("请输入你要查询火车票的剩余票数:");scanf("%d",&j);
 while(h->next!=NULL)
 {
      h=h->next;
      if(h->amount==j)
 return h;
 }
 return NULL ;
 break;
 }
 }

 //修改//
 void change(struct Node*h,int k)
 {
 int j;
 struct Node*p;
 p=find(h);
  printf ("----------------------------");
 printf ("\t   您要修改哪一项?\n");
 printf ("\t    1.火车编号\n");
 printf ("\t    2.起点和终点\n");
 printf ("\t    3.出发时间\n");
 printf ("\t    4.车票价格\n");
 printf ("\t    5.剰余票数\n");
 printf ("\t    0.退出系统\n");
 printf ("-------------------\n");
 printf ("请输入您要修改项的编号:"); 
 scanf ("%d",&j);
 switch (j)
 {
 case 1:
 printf ("修改后的火车编号:");
 scanf ("%d",&p->num);
 break;
 case 2:
 printf("修改后的起点和终点:");
 scanf ("%s",p->name);
 break;
 case 3:
 printf("修改后的出发时间:");
 scanf ("%s",p->time);
 break;
 case 4:
 printf("修改后的车票价格:");
 scanf ("%d",&p->price);
 break;
 case 5:
 printf("修改后的剩余票数:"); 
 scanf ("%d",&p->amount);
 break ;
 case 0:break;
 }
 }

 //删除//
int delete(struct Node*h)
 {
 struct Node*p ;
 int j;
 printf("请输入您要删除的火车票的编号:"); 
 scanf ("%d",&j);
 p=h->next;
 if(p==NULL)
 return 0;
 while(p!=NULL)
  {
    if(p->num==j)
    {
     h->next=p->next;
     free ( p );
     return 1;
    }
 h=p;
 p=p->next;
  }
 return 0;
 }

 //添加//
 void append ()
 {
 struct Node*p;
 FILE*fp;
 fp=fopen("1.txt","at+"); 
 if(fp==NULL)
  {
   printf("写文件出错,按任意键返回.\n");
   getchar ();
   exit (1);
  }
 printf("请输入要添加的火车票的信息:火车编号,起点和终点,出发时间,车票价格,剩余票数:\n");
 scanf("%d%s%s%d%d",&p->num,p->name,p->time,&p->price,&p->amount);
 fprintf(fp,"%d %s %s %d %d\n",p->num,p->name,p->time,p->price,p->amount); 
 getchar();
 fclose(fp);
 }

 //统计//
 void count(struct Node*h)
 {
 struct Node*s;
 s=h;
 int i,j,k,n=0;
 printf ("******************************************************************************************************\n");
 printf ("\t\t    请选择您要统计项目的序号:\n");
 printf ("\t\t    1.车票价格\n");
 printf ("\t\t    2.剰余票数\n");
 printf ("\t\t    0.退出界面\n");
 scanf("%d",&i);
 switch(i)
 {
 case 1:
 printf ("请输入您要统计车票的价格的标准:");
 scanf ("%d",&j);
 printf ("\t\t请选择低于或高于标准:\n");
 printf ("\t\t1.价格低于%d的个数\n",j);
 printf ("\t\t2.价格高于%d的个数\n",j);
 scanf ("%d",&k);
 if(k==1)
   {
     for(s=h->next;s->next!=NULL;s=s->next)
     if(s->price<j)
         n++;
 printf("车票价格低于%d的个数有%d个.\n",j,n);
    } 
 else
   {
     for(s=h->next;s->next!=NULL;s=s->next)
     if(s->price>j)
       n++;
 printf("车票价格高于%d的个数有%d个.\n",j,n);
 }
 break;
 case 2:
 printf("请输入您要统计剩余票数的数量:");
 scanf("%d",&j);
 printf("\t\t请选择低于或高于所输票数:\n");
 printf("\t\t1.票数低于%d的个数\n",j);
 printf("\t\t2.票数高于%d的个数\n",j);
 scanf("%d",&k); 
 if(k==1)
 {
   for(s=h->next;s->next!=NULL;s=s->next)
   if(s->amount<j)
   n++;
   printf("剰余票数低于%d的个数有%d个.\n",j,n);
 }
 else 
 {
   for(s=h->next;s->next!=NULL;s=s->next)
   if(s->amount>j)
       n++;
   printf("剩余票数高于％d的个数有％d个.\n",j,n);
 }
 break;
 case 0:break;
 }
 }

 //用户注册//
 void save_user()
 {
 char file[10]="2.txt";
 FILE*fp ;
 char name[20];
 char pwd[10];
 fp=fopen("2.txt","at+"); 
 if(fp==NULL)
 {
 printf("\n写文件出错,按任意键退出.\n");
 getchar();
 exit(1);
 }
 printf("请输入用户名:");
 scanf("%s",name);
 printf("请输入密码:");
 scanf("%s",pwd);
 fprintf(fp,"%s%s\n",name,pwd);
 getchar();
 fclose(fp);
 printf("用户注册成功!\n");
 }

 //登陆//
 int check(char name,char pwd)
 {
 char name1[20];
 char pwd1[10];
 FILE*fp;
 char file[10]="2.txt";
 if((fp=fopen("2.txt","rt"))==NULL)
 {
   printf("读文件出错,按任意键退出!\n");
   getchar();
   exit(1);
 }
 while(!feof(fp))
 {
     fscanf(fp,"%s%s",name1,pwd1);
     if(strcmp(name1,name)==0&&strcmp(pwd1,pwd)==0)
     return 1;
 }
 return 0;
 }

 
//排序//
 void sort(struct Node*h)
 {
 struct Node*s,*p,*m,*n;
 int t,t1,t2,t3;
 char s1[20]; 
 char s2[10];
 printf("车票价格由低到高排序如下:\n"); 
 for(s=h->next;s->next!=NULL;s=s->next)
     for(p=s->next;p->next!=NULL;p=p->next)
     if(s->price>p->price)
     {
         t1=s->num;s->num=p->num;p->num=t1;
         t2=s->price;s->price=p->price;p->price=t2;
         t3=s->amount;s->amount=p->amount;p->amount=t3;
         strcpy(s1,s->name);strcpy(s->name,p->name);strcpy(p->name,s1);
         strcpy(s2,s->time);strcpy(s->time,p->time);strcpy(p->time,s2);
     }
 print(h);
 printf("\n\n剩余车票数量由多到少排序如下:n");
 for(s=h->next;s->next!=NULL;s=s->next)
     for(p=s->next;p->next!=NULL;p=p->next)
     if(s->amount<p->amount)
     {
         t1=s->num;s->num=p->num;p->num=t1;
         t2=s->price;s->price=p->price;p->price=t2;
         t3=s->amount;s->amount=p->amount;p->amount=t3;
         strcpy(s1,s->name);strcpy(s->name,p->name);strcpy(p->name,s1);
         strcpy(s2,s->time);strcpy(s->time,p->time);strcpy(p->time,s2);
     }
     print(h);
 }