#include <stdio.h>

void main( int argc, char * argv[] )
  {
    char file_name[9];
    char file_ext[4];

    _bprintf( file_name, 9, "%s", argv[1] );
    _bprintf( file_ext,  4, "%s", argv[2] );
    printf( "%s.%s\n", file_name, file_ext );
  }