text: /*Exercise 4 - Functions
  
  Write a program to calculate the function called nCr which is defined as
  
  nCr = n!/ r!(n−r)!
  Where n! is the factorial of n.
  
  Implement the functions
  
  long Factorial(int no);
  long nCr(int n, int r);
  Do not modify the main function.*/
  
  #include <iostream>
  
  long Factorial(int no);
  long nCr(int n, int r);
  
  int main() 
  {
    int n, r;
    std::cout << "Enter a value for n ";
    std::cin >> n;
    std::cout << "Enter a value for r ";
    std::cin >> r;
    std::cout << "nCr = ";
    std::cout << nCr(n,r);
    std::cout << std::endl;
    
  }
  long factorial(int no)
  {
    long fac=1;
    for(int r=no;r>=;r==)
    {
      fac = fac*r;
    }
    return fac;
  }
  
  long nCr(int n,int r)
  {
    long NCR = 0;
    NCR = Factorial(n)/(Factorial(r)*Factorial((n-1)));
  
    return NCR;
  }
  