WAP to use argc and argv

/*WAP to use argc and argv*/

#include<stdio.h>
#include<conio.h>
main ( int  argc, char  *argv[ ] )
{
 FILE  *fs, *ft ;
 char  ch ;

 if ( argc != 3 )
 {
  puts ( "Improper number of arguments" ) ;
  exit( ) ;
 }

 fs = fopen ( argv[1], "r" ) ;
 if ( fs == NULL )
 {
  puts ( "Cannot open source file" ) ;
  exit( ) ;
 }

 ft = fopen ( argv[2], "w" ) ;
 if ( ft == NULL )
 {
  puts ( "Cannot open target file" ) ;
  fclose ( fs ) ;
  exit( ) ;
 }

 while ( 1 )
 {
  ch = fgetc ( fs ) ;

  if ( ch == EOF )
   break ;
  else
   fputc ( ch, ft ) ;
 }

 fclose ( fs ) ;
 fclose ( ft ) ;
       getch();
}