User:Shyal-b/Sandbox/combinations

using namespace std; double factorial(int a) { double r = a; 	 if (a > 0) { 		 while (--a) { 			 r *= a; 		 } } 	 else { 		 r = 1; } 	 return r; } int combinations(int n, int r) { return((int)(factorial(n)/(factorial(n-r)*factorial(r)))); } int main { 	 int n, r; 	 cout << "Enter any n and r to compute its combinations" << endl; cout << "n : "; cin >> n; 	 cout << "r : "; cin >> r; 	 long p = combinations(n, r); cout << "combinations : " << p << endl; return 0; }
 * 1) include
 * 2) include