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In a compiled language, you have an intermediate step, in which you take the source code, it runs through what's called a checker or a compiler or both, and it creates what's called object code.
而在编译语言里，你就会经过一个中间的步骤，在这种语言里输入源码后，先经过过滤器,或者编译器检查后，它会创建一个叫做目标代码的东西。
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Okay, so a compiler.
我们需要一个编译器。
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It's a little more involved on a PC but it's all free, the software you can download, and Linux in similar operating systems generally come with a compiler or you run a simple command to get it.
在PC机上有点复杂，但是它是免费的，你一般下载的软件，类似Linux的操作系统等等通常都需要,一个编译器，或者你可以运行一些简单的指令来获取。
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- You then run a compiler, in our case called "GCC" -- -- one of the world's most popular -- and then you can run it with some number of switches, these command line arguments as they're called that somehow influences the behavior of this program.
然后你们运行编译器，在这里我们使用叫做“GCC“的编译器-,这是全球最流行的-,然后你们可以通过一些命令来运行这个编译器，这些命令行参数可以,影响这个程序的行为。
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So you have to somehow convert the source code, the C code into 0s and 1s and for that process there exist this tool called a compiler that someone else wrote that takes this stuff as input and produces this stuff as output.
所以你必须把源代码，即C语言代码转换成二进制文件,这个过程就需要我们提到的编译器了,它是由别人编写的一个软件，以这些代码作为输入,将会产生的输出。
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> What's the difference between a compiler and a Makefile?
>，编译器和Makefile有什么区别？
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So I just realized this is a new MacBook Pro that I didn't actually download the compiler onto it apparently.
所以，我才意识到这是一台新电脑,显然我并没有把编译器安装到上面。
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You can compel the compiler to treat some value as a different type of value, at least if it makes intuitive sense that that should be possible.
你可以控制编译器处理,不同类型的数据，至少我们凭直觉,它应该是可能的。
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So you're implementing this black box, and if its purpose in life is to actually return a value, you have to tell the compiler what kind of value to expect, and this is going to have ripple effects.
你在实现这个黑盒子，如果它的目的是,返回一个值，你必须告诉编译器你期望的是什么类型的值，这个将是一个连锁反应。
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So what that means is the compiler is actually going to first "cast" so to speak 13 from whatever it is - to a float -- to a floating point value -- and then perform the division for us.
所以这里的意思是编译器将,做“计算“，譬如13这样一个浮点数,-到另一个浮点数-,然后为我们处理除法。
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You can't just take a quoted string back to back with another quoted string so you'd get some kind of compiler error.
你不能让一个引起来的字符串跟另一个引起来的字符串,背靠背,这样编译就会出错。
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So I'll now start to get into that habit, even though it's a bit of distracting detail, it's just consistent with the expectations that the compiler really has.
所以我现在将开始养成那个习惯，虽然这是一个有点分散注意力的细节，它只是与编译器,拥有的期望是并存的。
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It turns out you can list one, give it a name, and if you use square brackets, that tells the compiler I actually want to put multiple values inside of this -- inside of this variable and how do we do that?
结果是你可以列举一个，给它取个名字，如果你使用方括号，那是告诉编译器,在里面我需要许多的值--在这些变量里,我怎么做到的？
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So, thankfully, C does provide a solution for this, whereby, I can provide a hint, essentially, to the compiler.
幸亏，C为这个提供了一个解决方案，那样，本质上，我可以给编译器一个提示。
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So putting back that prototype allows me to compile this, because I'm saying proactively to the compiler hey, you're going to see a function called increment.
把那个原型放回原处使我能够编译它，因为我提前向编译器打了招呼，将看到一个叫做increment的函数。
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So I tried running a program in this little black and white window called GCC and we'll see it today working properly that is a so called compiler.
在一个名为GCC的黑色小窗口里,运行我们的程序,然后得出想要的结果,这就是所谓的编译器。
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So that is a flag that tells the compiler that I want to use or link into my own program code that someone else wrote that lives somewhere else on the system whose moniker is CS50.
所以那是一个标记，用来告诉编译器我想使用,或连接我自己的程序代码到一个叫做CS50的系统中的程序,可能其他人在那个系统写了这些程序。
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