#include <stdio.h>

int n = 0, m = 0, result = 0;
int num, den, dif;


// replace implementation by asm block(s)
void computeSum()
{
	result = 0;
	int k = n;
	while(k <= m)
	{
		result = result + k;
		k = k + 1;
	}
}

// don't translate to asm
int fact(int n)
{
	if (n == 0)
	{
		return 1;
	}
	else
	{
		return n * fact(n - 1);
	}
}


void computeChoose()
{
	if (m < n)
	{
		result = 0;
	}
	else if (n == m || n == 0)
	{
		result = 1;
	}
	else if (n == 1)
	{
		result = m;
	}
	else
	{
		// exit asm block:
		num = fact(m);
		den = fact(n);
		dif = fact(m - n);
		// reenter asm block:
		den = den * dif;
		result = num/den;
	}
}

int main(void)
{
	char response = 'y';
	while(1)
	{
		printf("enter two ints -> ");
		scanf("%d %d", &n, &m);
		computeSum();
		printf("sum = %d\n", result);
		computeChoose();
		printf("#choices = %d\n", result);
		printf("\nagain?(y/n) ");
		getchar(); // flush \n
		response = getchar();
		if (response == 'n') break;
	}
	printf("bye\n");
}