// calling.cpp -- defining, prototyping, and calling a function
#include <iostream>

void simple();    // function prototype

int main()
{
    using namespace std;
    cout << "main() will call the simple() function:\n";
    simple();     // function call
    return 0;
}

// function definition
void simple()
{
    using namespace std;
    cout << "I'm but a simple function.\n";
}