#include "stdio.h"

///////
int main1()
{
	int opx;
	int res;
	int i;

	tty_puts(" TASK 1 : FACTORIELLE \n");

	while (1) {
		tty_puts("\n*********************\n");
		tty_puts("operand  = ");
		tty_getw_irq(&opx);
		tty_puts("\n");
		if( (opx > 12) || (opx < 1) ) {
			tty_puts("operand must be larger than 0 and smaller than 13\n");
		} else {
			res = 1;
			for(i=opx ; i>1 ; i--) res = res*i;
			tty_printf("factorielle(%d) = %d\n", opx, res);
		}
	}
	return 0;
} // end main1