Chapter 10. Game Time

One of the great traditions of learning to program is typing in code you don’t understand. Really!

Sometimes just typing in code gives you a “feel” for how things work, even if you don’t understand every line or keyword. We did that in chapter 1, with the number-guessing game. Now we’re going to do the same thing, but with a longer, more interesting program.


Skier is a very simple skiing game, inspired by a game called SkiFree. (You can find out all about SkiFree here:

You ski down a hill, trying to avoid trees and pick up flags. Picking up a flag earns 10 points. Crashing into a tree makes you lose 100 points.

When you run the program, it should look something like this:

Skier ...

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