#include "stdio.h"

///////
int main2()
{
	int opx;
	int opy;

	tty_puts(" TASK 2 : PGCD \n");

	while (1)
    {
		tty_puts("\n*******************\n");
		tty_puts("operand X = ");
		tty_getw_irq(&opx);
		tty_printf("%d\n",opx);
		tty_printf("operand Y = ");
		tty_getw_irq(&opy);
		tty_printf("%d\n",opy);

		if( (opx < 1) || (opy < 1) )
        {
			tty_puts("operands must be larger than 0\n");
		}
        else
        {
			while (opx != opy)
            {
				if(opx > opy)   opx = opx - opy;
				else            opy = opy - opx;
			}
			tty_printf("pgcd = %d\n", opx);
		}
	}
	return 0;
} // end main2