#include "stdafx.h"
#include <iostream>

using namespace std;

double avg3(int a, int b, int c);	// just define the prototype
		// of the function. Leave the actual implementation (body)
		// of the function for later.


int main()
{
	double x, y, z;
	int d=1, e=2, f=3;
	x = avg3(d, e, f);
	y = avg3(1.23, 6, 5.6);

	return 0;
}

// the actual implementation of avg3
double avg3(int a, int b, int c)
{
	double sum;
	sum = a + b + c;
	a++;
	return sum / 3.0;
}