/*
    testfunc13.cpp
    CIS 150
    2008-06-10
    David Klick
   
    This program demonstrates how to use default arguments.
*/

#include <iostream>
#include <cmath>
using std::cin;
using std::cout;

double power(double x, double y = 2.0);
void cont();

int main(int argc, char* argv[]) {
    double a = 4.0;

    cout << "4 squared is " << power(a) << '\n';
    cout << "4 cubed is " << power(a, 3.0) << '\n';
   
    cont();
    return 0;
}

/*
    double power(double x, double y);
   
    Arguments:
        double x: an arbitrary real number
        double y: an arbitrary real number
   
    Returns: the value of x raised to the y power
   
    Calculates the value of one number raised to the
    power of another number.
*/
double power(double x, double y) {
    return pow(x, y);
}

/*
    void cont();
   
    Arguments: none
   
    Returns: nothing
   
    Clears input buffer and pauses waiting for user 
    to press Enter.
*/
void cont() {
    if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
    cout << "Press enter to continue...";
    cin.get();
}

/*
    Sample output:
   
    4 squared is 16
    4 cubed is 64
*/