listing02.03.ComputeAverage.cpp

#include <iostream>
using namespace std;

int main()
{
    // Prompt the user to enter three numbers
    double number1, number2, number3;
    cout << "Enter three numbers: ";
    cin >> number1 >> number2 >> number3;

    // Compute average
    double average = (number1 + number2 + number3) / 3;

    // Display result
    cout << "The average of " << number1 << ", " << number2 
        << ", " << number3 << " is " << average << endl;

    return 0;
}