Product of N odd numbers (C++)

Product of N odd numbers

productOddNums() calculates the product of N odd numbers between a specified range. It takes 2 parameter:

a is the lower limit of the specified range of odd numbers.

b is the upper limit of the specified range of odd numbers.

It returns the product of N odd numbers if both the numbers given to the function are odd, if any parameter to productOddNums() is even then this function will return a 0.

Code

#include "stdafx.h"

#include "iostream"

#include "conio.h"

#include "iomanip"

#include "math.h"

using namespace std;

int productOddNums(int a,int b)

{

int var=1;

 if((a%2==0)||(b%2==0))

   return 0;

 else

 {

  for(int i=a;i<=b;i=i+2)

  var=var*i;

  return var;

 }

}

int main()

{

       cout<< productOddNums( 1 , 3 );cout<<endl;

       cout<< productOddNums( 1 , 4 );cout<<endl;

       cout<< productOddNums( 1 , 5 );cout<<endl;

       cout<< productOddNums( 1 , 6 );cout<<endl;

       cout<< productOddNums( 1 , 7 );cout<<endl;

       cout<< productOddNums( 1 , 8 );cout<<endl;

       cout<< productOddNums( 1 , 9 );cout<<endl;

      

       _getche();

       return 0;

}

Output

3

0

15

0

105

0

945