First one, when I write a piece of code, especially code that has branches in it, when I design test cases for that piece of code, I should try and have a specific test case for each possible path through the code.

第一点，当我们写代码的时候，尤其是一些含有分支语句的代码的时候，当我为这些代码,设计测试用例的时候，我应该为每一个可能的程序路径,都设计一个特别的用例。

麻省理工公开课 - 计算机科学及编程导论课程节选

For the latter, this is a place where running test cases would do a good job of helping with that. Nonetheless, having done that, let's look at a better way to write this. Which is right here it is also, I think, on your sheet, I'm going to uncomment that, and comment this one out, yeah. All right?

对于后者来说，运行测试用例,对它会有很大的帮助，尽管如此，讲完了这些,让我们再来看看更好的,来写这个程序的一种方法吧，也就是这里,我想这程序也在，你们的课堂手册上面，我得先把这里取消注释,然后注释掉这里，是的，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选