Program to check whether a file is successfully opened or not

//program to check whether a file
//is successfully opened or not
#include<fstream.h>
#include<constream.h>
void main()
{
 clrscr();
  ifstream in("text");
  if(!in)
  cerr<<"\nFile is not opened";
  else
  cerr<<"\nFile is opened";
 getch();
}