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OK. So if we have variables, one of the questions we can ask is, what's the type of the variable.
好，如果我们有了一个变量，我们要问的问题之一就是，这个变量的类型是什么？
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The square brackets here, meanwhile, say this is a special type of variable that's got multiple values inside of it.
这里的这个方括号，同时，说明这个是特殊的变量类型,里面有很多复合的值。
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Because I might have written some code in which I'm expecting that integer particular variable to have an integer value.
因为我可能写了一些代码,来把一些,变量的类型，指定为。
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s1 I have a variable called s1 and it's char * of type char * so here we go.
我有一个变量,它的类型是。
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So one of the things I would like to suggest is that you develop some good style here, and in particular, don't change types arbitrarily.
所以我的建议是,你们要养成一些好的编程风格，尤其是，不要反复无常的改变变量的类型。
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If somewhere later on in the code it shifts to string, I might not be manipulating that and getting actual values out, but not what I wanted, and it's going to be really hard for me to chase it back.
然后后面的一些代码,把变量类型变为了字符串，我可能不会通过实际操作,去取得实际的变量的类型，但是这并不是我想要的类型,而且对我来说把类型，变回去也很困难。
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Now, what type of variable is this?
那么，这个变量的类型是什么？
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You don't want to make those changes.
你不该改变变量的类型。
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And the only thing that's differing is the name of the type and the name of the variable I'm using.
其中唯一的区别是数据类型的名字,和我使用的变量名字。
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Well, unfortunately in C, you have to be ever so specific as to what you wanna put in the variable.
很不幸，在C语言里，给变量赋值之前,你必须搞清楚它的数据类型。
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> David: At some point in time, I'm going to have to have declared the variable as a float before I can then hand it to printf as the insertion value for that format strength.
>，大卫：在一个特定的时间，我将需要,声明float类型这样的变量,那样我就可以把它打印出来,像是格式化优点的插入值。
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Well, it turns out C, like a lot of languages, comes out of the box with a whole bunch of built-in variable types.
在C语言还有其他一些编程语言里，都会有一大堆,固定的变量类型。
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So this line here declares a variable, just storage space called "x" and it's of type "int," which means an integer has to go in it.
这里的这条线声明了一个变量，一个叫做“x“的存储空间，它的类型是“int“,意思是里面存储的是整数型的数据。
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i So I have up here at the top of my program a variable called i 0 of type int, and I have to initialize it up here to zero.
所以在程序的顶端我有一个int类型的变量,我需要把它初始化为。
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So there's no mention of int, and yet we've been saying for the past couple of lectures, that anytime you declare a variable, you absolutely have to specify its type.
这里没有提及int，我们在前几个演讲中,一直讨论的东西，任何时候你声明一个变量，你必须指定它的类型。
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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。
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And I'm storing the answer in a variable called "answer" that's of type float.
我把这个答案存储在一个float类型的,叫做“answer“的变量中。
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