And the good news was we didn't have to worry about how math did square root or anything like that, we just got it and we used it.

也可能是其他数，好消息是,我们不必担心math函数是怎样开方的,我们只要使用它就好。

麻省理工公开课 - 计算机科学及编程导论课程节选

I can't rely on Professor Guttag if I give this- if this code to him, I can't rely on him to type in a float. Actually I can, because he's a smart guy, but in general, I can't rely on the user-- I wouldn't do it right to see if you did.

当Guttag使用这段代码的时候-,我不能相信他一定会输入一个浮点数,实际上我能因为他很聪明，但是总体上来讲，别相信用户一定会按照规则来-,我会故意做错来试试你的程序的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Well, simply with the * notation at least on the way in when you declare the function called swap, you simply say this is not going to take an int and another int because that's useless.

好的，简单说，当你声明一个函数调用swap函数时,使用*符号，你可以简单说，这不能使用一个int数和另外一个int数,因为那是无效的。

哈佛公开课 - 计算机科学课程节选