WAP to check existing file empty or not

/*WAP to check existing file empty or not*/

#include<stdio.h>
#include<conio.h>
main( )
{
 FILE  *fp ;

 fp = fopen ( "PR1.C", "r" ) ;
 if ( fp == NULL )
 {
  puts ( "cannot open file" ) ;
  exit( ) ;
 }
       getch();
}