Write a complete C++ program to calculate the value C where C = n! / ( k! * ( n + k ) ! – k ) using function.

Write a complete C++ program to calculate the value C where C = n! / ( k! * ( n + k ) ! – k ) using function.

代碼:

#include<iostream>
using namespace std;
double fact(double N)//function to calculate factorial of given number
{
  if(N>0)
      return N*fact(N-1);
  else
      return 1;
}
int main()
{
  double n,C,k;//declaring all variables as double
  cout<<"C = n! / ( k!* ( n + k)! - k)"<<endl;//display the Expression to user
  cout<<"\nEnter n:";
  cin>>n;
  cout<<"Enter k:";
  cin>>k;
  C=fact(n)/(fact(k)*(fact(n+k))-k);//calculating value of c
  cout<<"\nC = "<<C;//prints value of c
}