#include<stdio.h>
struct person
{
 char name[8];
  char tel[15];char qq[12];
char schpro[50];
};
char filename[20]="E:\\我的通讯录.txt";
FILE *fp;
void creat();
void output();
void search();
void append();
void modify();
void del();
main( )

{
 int m;
 creat();  
 while(1) 
{
printf("\n\t\t*********欢迎使用通讯录信息管理系统*********\n\n");
  printf("\n\t\t添加，请按1          查找，请按2");
  printf("\n\t\t修改，请按3          删除，请按4");
  printf("\n\t\t输出，请按5          退出，请按0");
  printf("\n\t\t\n");
printf("\n\t\t********************************************\n\n");
printf("请选择(0--5):");
scanf("%d",&m);
  if(m>=0&&m<=5)
    {
      switch(m)
       {
         case 1: append();
                 break;
         case 2: search();
                 break;
         case 3: modify();
                 break;
         case 4: del();
                 break;
         case 5: output();
                 break;
         case 0: exit();
       }
       printf("\n\n操作完毕，请再次选择！");
     }
    else
      printf("\n\n选择错误，请再次选择！");
   }
 }

/*输入模块creat( )： 创建通讯录的子函数。*/
void creat()
{
  struct person one;
  long s1;
  /*printf("\n请输入通讯录文件名：");
  scanf("%s",filename); */

  if((fp=fopen(filename,"at+"))==NULL)
      {
        printf("\n不能建立通讯录！");
        exit();
      }
  fprintf(fp,"%-10s%-20s%-20%-50s\n","姓名","电话号码","qq号码","学校和专业");
  printf("\n请输入姓名、电话号码、qq号码及学校专业（以0结束）\n");
  scanf("%s",one.name);
  while(strcmp(one.name,"0"))
     {
      scanf("%s%s",one.tel,one.qq,one.schpro);
      fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.qq,one.schpro);
      scanf("%s",one.name);
     }
  fclose(fp);
  }


/*输出模块output( )：输出通讯录中联系人通讯信息的子函数*/
void output()
{
  struct person one;
  if((fp=fopen(filename,"r"))==NULL)
     {
       printf("\n不能打开通讯录！");
       exit();
     }
  printf("\n\n%20s\n","通 讯 录");
  while(!feof(fp))
     {
      fscanf(fp,"%s%s%s%s\n",one.name,one.tel,one.qq,one.schpro);
      printf("%-10s%-20s%-20%-50s",one.name,one.tel,one.addr);
     }
  fclose(fp);
 }


/*添加模块append( )：向通讯录中添加某人通讯信息的子函数*/
void append()
{
  struct person one;
  if((fp=fopen(filename,"a"))==NULL)
    {
       printf("\n不能打开通讯录！");
       exit();
   }
  printf("\n请输入添加的姓名、电话号码、qq号码及学校专业\n");
  scanf("%s%s%s",one.name,one.tel,one.qq,one.schpro);
  fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.qq,one.schpro);
  fclose(fp);
}


/*查找模块search( )：在通讯录中查找某人通讯信息的子函数*/
void search()
{ struct person one; 
 int k,j=0;
  if((fp=fopen(filename,"rb"))==NULL)
    {
      printf("\n不能打开通讯录！");
      exit();
    }
  printf("\n姓名查找请按1")；
  printf("\n电话号码查找请按2");
  scanf("%d",&k);
  switch(k)
  {case 1:
        {char namekey[8];printf("\n请输入姓名：   ");
           scanf("%s",namekey);
           while(!feof(fp))
   {
    fscanf(fp,"%s%s%s%s\n",one.name,one.tel,one.qq,one.schpro);
    if(!strcmp(namekey,one.name))
      {
        printf("\n\n已查到，记录为：");
        printf("\n%-10s%-20s%-20s0%-50s",one.name,one.tel,one.qq,one.schpro);
        j=1;
      }
    }
   if(!j)
     printf("\n\n对不起，通讯录中没有此人的记录。");
   fclose(fp);
        } break;
  case 2:
        {char telkey[15];printf("\n请输入电话号码：   ");
           scanf("%s",telkey);
           while(!feof(fp))
   {
    fscanf(fp,"%s%s%s%s\n",one.name,one.tel,one.qq,one.schpro);
    if(!strcmp(telkey,one.tel))
      {
        printf("\n\n已查到，记录为：");
        printf("\n%-10s%-20s%-20s0%-50s",one.name,one.tel,one.qq,one.schpro);
        j=1;
      }
    }
   if(!j)
     printf("\n\n对不起，通讯簿中没有此人的记录。");
   fclose(fp);
        } break;
  }


/*修改模块modify( )：在通讯录中修改某人通讯信息的子函数*/
void modify()
{  
 int m,k=0;
 long offset;
 char namekey[8];
 struct person one;
 printf("\n请输入姓名:");
 scanf("%s",namekey);
 if((fp=fopen(filename,"r+"))==NULL)
      {  
         printf("\n不能打开通讯录！");
         exit();
      }
 while(!feof(fp))
    {  
       offset=ftell(fp);
       fscanf(fp,"%s%s%s\n",one.name,one.tel,one.qq,one.schpro);
       if(!strcmp(namekey,one.name))
         {
           k=1;
           break;
         }
    }
  if(k)
   {  
     printf("\n已查到，记录为：");
     printf("\n%-10s%-18s%-50s",one.name,one.tel,one.qq,one.schpro);
     printf("\n请输入新姓名、电话号码、qq号码及学校专业：");
     scanf("%s%s%s",one.name,one.tel,one.qq,one.schpro);
     fseek(fp,offset,SEEK_SET);
     printf("%ld",ftell(fp));
     fprintf(fp,"%-10s%-20s%-20s%-50s\n",one.name,one.tel,one.qq,one.schpro);
    }
  else
      printf("\n对不起，通讯录中没有此人的记录。");
  fclose(fp);
 }


/*删除模块del( )：在通讯录中删除某人通讯信息的子函数*/
void del()
{  
   int m,k=0,flag;
   long offset1,offset2;
   char namekey[8], valid[4];
   struct person one;
   printf("\n请输入姓名:");
   scanf("%s",namekey);
  if((fp=fopen(filename,"r+"))==NULL)
      {  
         printf("\n不能打开通讯录！");
         exit();
      }
  while(!feof(fp))
      {  
        offset1=ftell(fp);
        fscanf(fp,"%s%s%s\n",one.name,one.tel,one.qq,one.schpro);
        if(!strcmp(namekey,one.name))
           {
              k=1;
              break;
              if(k)
               {
                printf("\n已查到，记录为");
                printf("\n%-10s%-20s%-20s%-50s",one.name,one.tel,one.qq,one.schpro);
                printf("\n确实要删除,按1；不删除，按0：");
                scanf("%d",&m);
                if(m)
                  {
                   fseek(fp,offset1,SEEK_SET);
                   fprintf(fp,"%-10s%-20s%-20%-50s\n","","","","");
                  }
                else
                   printf("\n对不起，通讯录中没有此人的记录。");
                fclose(fp);
               }
            }
       }
    }