Help with default parameters

// Listing 5.7 - demonstrates use
// of default parameter values

#include <iostream>

int AreaCube(int length, int width = 25, int height = 1);

int main()
{
int length = 100;
int width = 50;
int height = 2;
int area;

area = AreaCube(length, width, height);
std::cout << "First area equals: " << area << "\n";

area = AreaCube(length, width);
std::cout << "Second time area equals: " << area << "\n";

area = AreaCube(length);
std::cout << "Third time area equals: " << area << "\n";
return 0;
}

int AreaCube(int length, int width, int height)
{

return (length * width * height);
}

// my question is this, why is it not
//possible to pass height without passing in
//a width?

As soon as you pass a parameter rather than relying on a default parameter, you've got to pass in parameters for everything to the left of it. So without changing the order of your parameters, what you asked isn't possible.