WAP to File-copy which copies text, .com and .exe files

/*WAP to File-copy which copies text, .com and .exe files */

#include "fcntl.h"
#include "types.h"  /* if present in sys directory use 
          "c:tc\\include\\sys\\types.h" */
#include "stat.h"  /* if present in sys directory use 
         "c:\\tc\\include\\sys\\stat.h" */

main ( int  argc, char  *argv[ ] )
{
 char  buffer[ 512 ], source [ 128 ], target [ 128 ] ;
 int  inhandle, outhandle, bytes ;

 printf ( "\nEnter source file name" ) ;
 gets ( source ) ;

 inhandle = open ( source, O_RDONLY | O_BINARY ) ;
 if ( inhandle == -1 )
 {
  puts ( "Cannot open file" ) ;
  exit( ) ;
 }

 printf ( "\nEnter target file name" ) ;
 gets ( target ) ;

 outhandle = open ( target, O_CREAT | O_BINARY | O_WRONLY,       S_IWRITE ) ;
 if ( inhandle == -1 )
 {
  puts ( "Cannot open file" ) ;
  close ( inhandle ) ;
  exit( ) ;
 }

 while ( 1 )
 {
  bytes = read ( inhandle, buffer, 512 ) ;

  if ( bytes > 0 )
   write ( outhandle, buffer, bytes ) ;
  else 
   break ;
 }

 close ( inhandle ) ;
 close ( outhandle ) ;
}