#include "RCX_RTE.h"

int16 gcd(int16 x, int16 y) 
{
    while ( x != y )
     { if ( x < y )
         { y=y-x; }
       else
	 { x=x-y; }
     }
   return x;
}	

void _start(void) 
{ 
  lcd_show_int16(gcd(9,4))\;
}