#include <iostream>
using namespace std;

/* This function takes three integers and returns their
   average value as a double. */
double average(int v1, int v2, int v3)
{
	double sum;

	sum = v1 + v2 + v3;
	return sum / 3.0;
}
int main(void)
{
	// Prompt for, and read, three integers.
	cout << "Please enter three integer values: ";
	int n1, n2, n3;
	cin >> n1 >> n2 >> n3;

	// Compute the average using the above function.
	cout << "The average of " << n1 << " " << n2 << " " << n3 
	     << " is " << average(n1, n2, n3) << endl;
}