#include <iostream>
#include <exception>
using namespace std;

void tryToGuess()
{
  bool guessOncemore = true;
  int magic=123;
  int guess;
  cin.exceptions(ios_base::failbit);
  
  try
  {
    while(guessOncemore && cin>>guess)
    {
      if(guess==magic)
      {
        cout<<\"* * right * *\"<<endl;
        guessOncemore = false;
      }
      else
        cout<<\"* * wrong * *\"<<endl;
    }
  }catch(ios_base::failure & bf)
  {
    cout<<bf.what()<<endl;
    cin.clear();  // reset stream state
    while(!isspace(cin.get()))
      continue;  // get rid of bad input
    tryToGuess();  // will work now
  }
}

int main(int argc, char* argv[])
{
  tryToGuess(); 
  return 0;
}

输入123.qwqdq......
或者123.123123213.....
看看……
不过你写得不错啊，偶现在还看不懂，嘿嘿