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Right now, I have to take that piece of code and replicate it everywhere I want in my larger file.
现在我要把这段代码,复制到,大文件中的各个部分。
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And, it's also, I think they keep in on file.
还有，我想这个还会记录在档案里。
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stdio h It pretty much means open this file, standard IO dot H and just paste its contents right here.
它的大致上的意思是打开这个文件,然后把它的内容粘贴在那里。
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Right now, you've got to write it in one file.
现在，你可以把它写在一个文件里。
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You can put a variable there, and because it's not encapsulated in curly braces, as we just discussed, that essentially means it's accessible everywhere in that file.
你可以加入一个变量，因为它不是封装在花括号里，就像我们刚才讨论的，本质的意思是它可以在文件的所有地方,都可以被访问到。
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When you're working on a file, it's saving constantly to RAM but also hopefully to disc, the hard disk so you don't actually lose it if the power goes off.
当你打开一个文件，它不断地保存在内存中,但对于光盘，硬盘,当你断开电源的时候，数据不会丢失。
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So those are in fact the patterns of zeroes and ones, the bytes that would have been outputted had I hello c remembered to download the compiler to this computer and run it on that little hello.c file.
这些都是0和1的模式，如果我记得下载编译器到计算机上的话,我们就能运行下这个,然后看看输出的字节。
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It's instead outside of them and, by convention, at the top of the file so that I can access it anywhere, whether or not this is a good thing, remains to be seen.
它在函数的外面，按照惯例，在文件的顶端，所以我可以在任何地方使用它,不管这是不是好事情，拭目以待。
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Well, I include what's called a header file as we'll call it.
好吧，我需要包含一个头文件。
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It's in a file called swap.C. Everything should be alphabetical so it should be toward the end of this week's packet and notice that it's almost identical except for a couple of syntax changes.
在一个叫做swap。c的文件中，对于这周末的数据包来说,所有的东西都是字母,请注意,除了几个语法改变,它几乎是一样的。
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So I could -- and the hint here is that looks like you probably do want to use CS50's library because I've included the so-called header file for it.
所以我可以--这里的提示看起来好像,你可能的确想使用CS50的函数库,因为我包含了所谓的头文件。
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Make then assumes I'm in a file called make math2.c and goes and finds it.
假设我在一个叫做“make，math2，c“的文件里,然后去找它。
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In a .h file, it's generally the names of functions other people wrote.
在头文件里,只有一些函数名。
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This is a keyword to Python that says, when it reads this in the file, it says, I'm creating a definition.
这是Python语言的关键词，当你在文件中读到这个词的时候，它的意思就是我正在创建一个定义。
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I like it at the top of my file.
我喜欢把它放到我文件的顶端。
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It was scoped to the whole file.
而是在整个文件的范围。
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So I'm gonna go ahead and save this file, hello c it's hello.c, dot C hints at the fact that this program I just whipped up is written in a language called C.
所以我打算继续，保存，并命名为，“，c“表明这个程序,是使用C语言写的。
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It takes an int; deal with it when you get to it and then once you look through the whole file, should you find -- ultimately find the actual code that defines or impliments this thing.
它携带一个int数，当你获得了它就处理它,然后一旦你查看整个文件，最终你将发现实际代码中,定义或执行了这个东西。
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It makes sense to me logically that I want to see it first when I open the file; so I scroll on down but only later is increment declared.
这个逻辑上对我是有意义的，打开文件的时候,我想先看到它，所以我向下翻,之后才声明increment函数。
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So it turns out a really nice shortcut on most systems, oops, is to say if you have a file called hello.c and you wanna turn it into a program called hello, well, make hello just write in the command makeHello and it will do all of that for you automatically and hand you a program called hello.
就是寻找一种能在大多数系统上运行的更快捷的方式，哇！,也就是说，你有一个hello，c的文件,你想把它变成一个名为hello的程序，那么只需要敲入命令,它就会自动为你生成,一个hello程序。
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So among your printout from Wednesday, if you have it, you have a file called math1.c. If you don't have this, the programs are short today, so it should be easy enough to follow along visually, but a PDF and the actual source code is available online for these things.
从你们周三打印出来的资料来看，如果你们手上有的话，你们会看到有个叫做的“math1，c“的文件，如果你们没有资料，那些程序还是比较短的，所以你们应该可以很轻松地,来看这些程序，但是那个PDF文件,和实际的源代码都可以到网上找到,相关的资料。
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