The formula for solving the combinatorial number is C .... The programming input m,n, the output combination number, the request uses the custom function realization to seek the factorial __php

/* Experimental content: Combinatorial number solution formula is C .... Programming input m,n, output combination number, required to use a custom function to achieve factorial

 * Yantai University Computer College Class 114-3 students

 * Author: Liu Yang

 * Time: March 4, 2012

 * (2-1) The formula for solving the combinatorial number is C ... The programming input m,n, the output combination number, the request uses the custom function implementation to seek the factorial.

 * Algorithm Description: */

#include <iostream>
using namespace std;
Long FAC (int n)
{
	long  double S=1;
	while (n>0)
	{
		s=s*n;
		--n;
	}
	return s;
}
int main ()
{
	int m,n,t;
	a long double a,b,c;
	cout<< "Please enter the value of M:";
	cin>>m;
	cout<<endl;
	cout<< "Please enter the value of N:";
	cin>>n;
	if (n!=0&&m>=n)
	{
		A=FAC (m);
		B=FAC (n);
		C=FAC (m-n);
		t=a/(b*c);
		cout<< "Combined number result:" <<t<<endl;
	}
	else 
		cout<< "No results" <<endl;
	return 0;

}

Operation Result: