#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;
}
/* This function simply prints the numbers averaged, and the result. */
void print_it(int a1, int a2, int a3, double av)
{
cout << "The average of " << a1 << " " << a2 << " " << a3
<< " is " << av << endl;
}
int main(void)
{
// Prompt for, and read, three integers.
cout << "Please enter three integer values: ";
int n1, n2, n3;
cin >> n1 >> n2 >> n3;
print_it(n1, n2, n3, average(n1, n2, n3));
}