And if it sees S-W-A-P, open parentheses, close parentheses, and it hopefully sees two ints inside of it, that's all it needs to do in order to finish compiling your code.

如果它看到了SWAP，左圆括号，右圆括号，它可能载里面看到两个int数，那是它所需要做的,用来完成代码的编译。

哈佛公开课 - 计算机科学课程节选

If you finish Singh's code book and want to tax your brain even more, go back to David Kahn's 1, 200-page The Codebreakers, a classic that came out in 1967 and was recently updated.

FORBES: I've got a secret

Adding predictive routines and arbitrary values allows for situation-specific code we might not get elsewhere, whether it's estimating the finish time of a marathon or guessing just how much post-run beer is possible before the guilt sets in.

ENGADGET: Suunto Ambit update lets athletes build their own GPS watch apps