And here, too, it's just a little baby program in that I'm hardcoding the expression 17 divided by 13.

然后这里，这只是一个子程序,在那里面我硬编码了表达式“17除以13“

哈佛公开课 - 计算机科学课程节选

But here I'm doing the exact same thing except my number here 13 0 in the bottom in the denominator is 13.0.

但是这里我在做一个同样的计算,除了在下面的分母是。

哈佛公开课 - 计算机科学课程节选

3 So here what I'm doing is 17 divided by 13, but because of this parenthetical, , -- because of that parenthetical -- that has nothing to do with math; -- this is a programming language thing -- that is a casting operation.

所以这里我要做的是用17除以，但因为这样的题外话，因为那样的题外话-,还是没有做完这个数学题;,这是一个编程语言的东西-,那是一个计算操作。

哈佛公开课 - 计算机科学课程节选

But how many of you have ever called Facebook up or called Amazon up and kind of whispered into their ear I'm going to encrypt this with the number 13.

但是有谁听过Facebook或者亚马逊,稍微低声地告诉他们,我将用密钥13加密这个消息？

哈佛公开课 - 计算机科学课程节选