My prototype, again, so that I can use it later increment without the compiler wondering what is this increment that you're referring to because it's not otherwise been declared.

我的函数原型，再次强调，我可以以后使用它,这样编译器就不会疑惑这个你提及的,是什么，因为是没有,被声明的。

哈佛公开课 - 计算机科学课程节选

It's a common mistake to make if you forget that I've actually declared that variable up top, but wait a minute, I know any time that I use a variable, I have to declare it.

这是一个通常犯的错误，如果你忘了,之前在前面已经声明了这个变量，等等，我知道在任何时候,我使用一个变量，我必须声明它。

哈佛公开课 - 计算机科学课程节选

And just to look ahead a little bit, you could easily imagine that I might want to not just put a statement in there, what the specs are, I might want to put some constraints. Some specific things to check for, to make sure that you're calling the code right.

这不仅是抽象的概念还有规范的概念，我们再往前看看,你可以简单的想象得到，我不仅仅是想在这里加一个声明,这些规范说明中我还想加一些约束，我们要注意一些特殊的事情。

麻省理工公开课 - 计算机科学及编程导论课程节选

Notice that that typically also defines for me what the internal variables are, what the internal characteristics of the class are going to be.

就放进去是比较好的,我写下了init声明意思就是，当你创建一个实例的时候,这就是你要进行的操作。

麻省理工公开课 - 计算机科学及编程导论课程节选

When you declare a pointer yourself manually, you do say char * the variable name because recall that's the same thing that we did earlier but we called it instead string.

当你手动声明一个指针是，你可以说char，*，变量名字,因为那是我早些时候做的事情,但是我们叫它为字符串。

哈佛公开课 - 计算机科学课程节选

int So whereas before I mentioned int, turns out if you wanna put a string in a variable, you have to say this is a string.

先不管我之前提到的，如果你想把一个字符串赋给某个变量，那你必须事先声明这个变量是string类型的。

哈佛公开课 - 计算机科学课程节选