#include <stdio.h>
#include <stdlib.h>


void main( int argc, char *argv[] )
{
 char c;
 FILE *f;
 long longw = 0xABCDEF01;

 if ( argc != 2 || (f = fopen( argv[1], "a+b" )) == NULL )
 {
  printf( "Fichero %s no existe...\n\n", argv[1] );
  exit(-1);
 }

 c = 4;
 fseek( f, 0x14  , SEEK_SET );
 fwrite( &c, sizeof(char), 1, f );
 c = 0;
 fseek( f, 0x14FD , SEEK_SET );
 fwrite( &c, sizeof(char), 1, f );
 fseek( f, 0x1A71 , SEEK_SET );
 fwrite( &c, sizeof(char), 1, f );
 fseek( f, 0x242C1 , SEEK_SET );
 fwrite( &c, sizeof(char), 1, f );

 fclose(f);

}