In order to study further aspects of if statements in C, let's make our sliding block problem a little more complicated. In the previous sections, we in effect assumed that our ramp was infinite. Where did we make that assumption?
Let's change our problem by taking into account the length of the ramp and requiring that the block stop once it reaches the bottom. You can see a version of our block program that solves this problem by reading ``examples/block2.c'' into Emacs. You can also view it directly.
The if statement contained in ``block2.c'' is slightly more complicated than was the case in ``block1.c''. Can you identify two new things that we are doing?
Notice once again how the indentation of ``block2.c'' makes the structure of the program clear.