C Program to find nCr

This program finds the NCR ( to calculate combinations). The program displays the output when the values of n and r are provided. We have also created a function called facto to find the factorial of a number.
The equation is nCr = n! / r! * (n - r)!

	#include<stdio.h>
	int facto(int f)
	{
	int fact = 1;
	for(;f>0;f--)
	{
	fact=fact*f;
	}
	return fact;
	}
	int main()
	{
	int n,r;
	float s;
	printf("n == ");
	scanf("%d",&n);
	printf("r == ");
	scanf("%d",&r);
	s = facto(n)/(facto(n-r) * facto(r));
	printf("%d C %d = %f ",n,r,s);
	getch();
	return(0);
	}

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