#include <iostream>
#include <fstream>
using namespace std;
#define FILENAME "stat.dat"
int main()
{
     fstream _file;
     _file.open(FILENAME,ios::in);
     if(!_file)
     {
         cout<<FILENAME<<"沒有被創建";
      }
      else
      {
          cout<<FILENAME<<"已經存在";
      }
      return 0;
}