#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct
{
      char name[10];
      char jiguan[20];
      long long num1;
      long long  num2;
      char email[20];
}person;
void xinjian(FILE *p);
void liulan(FILE *p);
void chaxun(FILE *p);
void xiugai(FILE *p);
int shanchu(FILE *p);
int count=0;
FILE *p;
person lxr;
void main()
{
    char next='Y';
    char ch;
    int b;
    while(next=='Y')
{
    printf("---------欢迎使用讯通讯录---------\n");
    printf("功能目录：\n");
    printf("1:新建联系人\n");
    printf("2:查看联系人\n");
    printf("3:查找联系人\n");
    printf("4:修改联系人信息\n");
    printf("5:删除联系人\n");
    printf("6:退出通讯录\n");
    int c;
    printf("请输入序号：");
    scanf("%d",&c);
    switch(c)
    {
        case 1:xinjian(p);
        break;
        case 2:liulan(p);
        break;
        case 3:chaxun(p);
        break;
        case 4:xiugai(p);
        break;
        case 5:b=shanchu(p);
        break;
        case 6:printf("感谢您的使用");
        break;
        default:printf("请输入正确的序号:\n");
        break;
    }
    if(c==6)
    next='N';
    else
    {
    printf("继续使用系统功能:Y\n退出:其他字母\n");
    if(c==5)
    scanf("%c",&next);
    else
    scanf("%c%c",&ch,&next);
    }
 }
}
void xinjian(FILE *p)
{
    char next='Y';
    p=fopen("txl.sto","rb+");
    if(p==NULL)
   p=fopen("txl.sto","wb+");
   fseek(p,0,SEEK_END);
   while(next=='Y')
  {
   printf("姓名:\n");
   scanf("%s",lxr.name);
   printf("籍贯:\n");
   scanf("%s",lxr.jiguan);
   printf("电话号码1:\n");
   scanf("%lld",&lxr.num1);
   printf("电话号码2:\n");
   scanf("%lld",&lxr.num2);
   printf("邮箱:\n");
   scanf("%s",lxr.email);
   fwrite(&lxr,sizeof(lxr),1,p);
   fflush(stdin);
   printf("是否继续进行建立新联系人；\n是:Y\n否:其他字母\n");
   next=getchar();
   count=count+1;
   }
   fclose(p);


}
void liulan(FILE *p)
{   int i=0;
    p=fopen("txl.sto","rb+");
    if(p==NULL)
   {
       printf("通讯录为空，请建立新联系人!\n");
       fclose(p);
    }
    else
   {
    rewind(p);
    printf("\n\nItem list-------------------------------------1\n");
    printf("姓名     籍贯     电话号码1     电话号码2     邮箱\n");
    fread(&lxr,sizeof(lxr),1,p);
    while(!feof(p))
    {
        printf("%s  %s  %lld   %lld     %s\n",lxr.name,lxr.jiguan,lxr.num1,lxr.num2,lxr.email);
        fread(&lxr,sizeof(lxr),1,p);
    }
    fclose(p);
   }

}
void chaxun(FILE *p)
{
    int i=0;
    p=fopen("txl.sto","rb+");
    if(p==NULL)
   {
       printf("通讯录为空，请建立新联系人!\n");
       fclose(p);
    }
    else
   {
    char mingzi[20];
    printf("请输入要查询的用户名:\n");
    scanf("%s",mingzi);
    fread(&lxr,sizeof(lxr),1,p);
    while(!feof(p))
    {
        if(strcmp(mingzi,lxr.name)==0)
       {
        printf("姓名：     籍贯:     电话号码1:     电话号码2:     邮箱:\n");
        printf("%s        %s     %lld     %lld   %s\n",lxr.name,lxr.jiguan,lxr.num1,lxr.num2,lxr.email);
        i=i+1;
       }

       fread(&lxr,sizeof(lxr),1,p);
    }
   if(i==count&&(strcmp(mingzi,lxr.name)!=0))
    printf("无该联系人\n");
    fclose(p);
   }
}
void xiugai(FILE *p)
{
    rewind(p);
    p=fopen("txl.sto","rb+");
     if(p==NULL)
   {
       printf("通讯录为空，请建立新联系人!\n");
       fclose(p);
    }
    else
  {
    char mingzi[20];
    printf("请输入要修改的有用户名:\n");
    scanf("%s",mingzi);
    while(!feof(p))
    {
        fread(&lxr,sizeof(lxr),1,p);
        if(strcmp(mingzi,lxr.name)==0)
        {
            char next='Y';
            printf("1.姓名:%s\n",lxr.name);
            printf("2.籍贯:%s\n",lxr.jiguan);
            printf("3.电话号码1:%lld\n",lxr.num1);
            printf("4.电话号码2:%lld\n",lxr.num2);
            printf("5.邮箱:%s\n",lxr.email);
            printf("6.取消\n");
            while(next=='Y')
           {
            int c;
            printf("请输入序号:");
            scanf("%d",&c);
            switch(c)
            {
             case 1:printf("请修改姓名:");
                    scanf("%s",lxr.name);
                    break;
             case 2:printf("请修改籍贯:");
                    scanf("%s",lxr.jiguan);
                    break;
             case 3:printf("请修改电话号码1:");
                    scanf("%s",lxr.num1);
                    break;
             case 4:printf("请修改电话号码2:");
                    scanf("%s",lxr.num2);
                    break;
             case 5:printf("请修改邮箱:");
                    scanf("%s",lxr.email);
                    break;
             default:printf("输入错误");
                    break;
            }
            printf("继续修改:Y\n停止修改:其他字母\n");
            getchar();
            next=getchar();
           }
            fseek(p,-sizeof(lxr),SEEK_CUR);
            fwrite(&lxr,sizeof(lxr),1,p);
            printf("修改成功!\n");
            fclose(p);
            return ;
        }


    }
    printf("没有该联系人\n");
    fclose(p);
    return;
  }
}
int shanchu(FILE *p)
{
    p=fopen("txl.sto","rb+");
     if(p==NULL)
   {
       printf("通讯录为空，请建立新联系人!\n");
       fclose(p);
       return 0;
    }
    else
   {
    person b;
    person blank={};
    char name[20];
    int c=0;
    rewind(p);
    printf("请输入您要删除的联系人名称：");
    scanf("%s",name);
    fflush(stdin);
    while(!feof(p))
    {
        fread(&b,sizeof(b),1,p);
        if(strcmp(name,b.name)==0)
        {
            fseek(p,-sizeof(b),SEEK_CUR);
            fwrite(&blank,sizeof(blank),1,p);
            printf("删除成功!\n");
            fclose(p);
            c=c+1;
            return 0;
         }

    }
  if(c==count&&(strcmp(name,b.name)!=0))
    printf("无该联系人!\n");
    fclose(p);
    return 0;
   }
}