void triangle3 (int num){
	int i, j, tmp2, sum = 1;
	char c;
	tmp2 = num-1;
	for (i = 1; i <= num; i++) {
		for (j = 1; j <= (tmp2+sum) ; j++) {
			if (j <= tmp2) c = ' ';
			else c = '*';
			printf("%c% ",c);
		}
		sum = sum+2;
		printf("\n");
		tmp2--;
	}
}