#include<iostream>
#include<string.h>
#include<time.h>
#include<stdlib.h>
using namespace std;
int main( int argc, char * argv[] )
{
  int i,j,A,B,z;
  char a[4],b[5];
  cout<<"對你應該是小case吧!Take a guess!Just input four numbers."<<endl;
  cout<<"It is :";
  srand(time(NULL));
  for(i=0;i<4;i++)
  {
   a[i]=rand()%10+48;   //亂數函數
   for(;;){       //避免千位數為0
   if(a[0]==0)
    a[0]=rand()%10+48;
   else
    break;
   }
   for(j=0;j<i;j++)    //避免數字重複
    for(;;)
    {
     if(a[i]==a[j])
      a[i]=rand()%10+48;
     else
      break;
    }
  }
  do
  {
  A=B=0;
  for(;;){       //確保猜的是4位數
   cin>>b;
   if(b[4]==NULL&&b[0]!=NULL&&b[1]!=NULL&&b[2]!=NULL&&b[3]!=NULL)
    break;
   else{
    cout<<"輸入ERROR!One more time:";
    continue;
   }
  }
  for(i=0;i<4;i++)   //Start!
  {
   if(a[i]==b[i])
    A++;
   for(j=0;j<4;j++)
    if(b[i]==a[j]&&a[i]!=b[i])
     B++;
  }
  cout<<"   "<<A<<"A"<<B<<"B"<<endl;
  z=strncmp(a,b,4);
  }while(z!=0);
  cout<<"Bingo!不簡單喔!的確是"<<b<<endl;
  system("pause");
  return 0;
}