Playing with functions.

func.cpp

#include <iostream>

using namespace std;
double prodSum(double a, double b);

int main(int argc, char *argv[])
{
  cout << "enter value for x and y:\n" << endl;

	double x = 0;
	double y = 0;

	cin >> x;
	cin >> y;

	double product = prodSum(x,y);
	cout << product << endl;
}

double prodSum(double a, double b)
{
	return a+b;
}