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printf And then I'm gonna use the same printf line after that to actually plop it into this formatted string.
我还是要用到,来把它转换成格式化字符串。
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printf That's not actually where someone implemented print F and related functions, rather, in dot H files, by convention, are prototypes.
那实际不是有某人在哪里执行,相关函数，而是在，h文件中，按照惯例，它们是函数原型。
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printf So here I'm culling printf in a loop again and again, but I'm literally overwriting the previous thing that I wrote.
所以这里我一次次地在循环中使用，但是我逐行地覆盖了我之前所写的东西。
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printf I have my includes, standard IO's; so I can use print F, but then I had this thing called a prototype.
我包含了标准输入输出文件，所以我可以使用，然后我有这个原型。
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So the end result, because someone wrote this function years ago is that printf takes this thing, takes this thing, David plops David inside the middle of that formatted string and then renders the whole result.
基于这是某人多年以前写的程序,最终的结果是打印出这个，这个，在格式化字符串中间的,然后返回结果。
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Last time we used printf generally to print a static string, like a hardcoded string, like "David," just for example's sake.
上次我们通常用“printf“,来打印一个静态的字符串，像硬编码的字符串“David“,这只是个例子。
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> >> David: F, c because I want to tell printf, "Use these values in those placeholders, these values in those format strings."
>，【无法辨认的声音】,>>，大卫：“f，c“因为我想告诉printf，“在那些占位符,和那个格式下打印这些值“
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printf Right. When in doubt, let me just use print F for now.
对的，当感到怀疑的，让我现在只用。
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> So for anything that's not printf, you have to write out code?
>，对于不是打印输出的，你需要写出代码吗？
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Well, a whole bunch of stuff but the only one I care about right now is a tool called printf.
恐怕整个教室就我一个人关心,这个printf函数吧。
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> So is there a slash letter command for printf they could just like type you know what I mean?
>，所以这里有一个斜杠字母命令,来printf，他们可以像,【听不见的】你懂我的意思吗？
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But for the next week or two when you're writing programs, at least for the first time, generally if you're trying Scratch to debug them like you might have been trying to troubleshoot Scratch, you're probably going to reason - through it by looking through the your code -- -- top to bottom, maybe engage a staff member for help -- but your friend will also be printf.
但是，在接下来的一两周内，当你们写程序的时候，或至少在第一次写的时候，通常如果你在调试程序,就像你们可能已经试着调试过,你们或许是通过查看你们的代码,来推断你们的程序-,从头到尾，可能还需要别人的帮忙-,但是你的朋友也将要打印输出。
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printf I'm first saying printf.
我先用。
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Is there a command to printf?
是否有个命令来打印？
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Now because among its contents is the prototype for print F, that is why, very simply, I can call print F without having to declare its prototype myself.
现在因为在它的内容中是printf的原型，这就是为什么我可以不声明printf函数的原型,而可以调用它。
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I print F, I backslash N, just to pretty up the screen, ArgC I then iterate from, I equal zero up to Arg C; so Arg C is the convention.
我键入printf，反斜杠n，来使屏幕变得美观点，然后i开始迭代，从i等于0增加到;,所以ArgC是一个约定。
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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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printf So thus far, the things I put David between quotes are just simple things like David or David backslash N, but what if I want to do call my self David in quotes, right?
像我们前面提到的,我们把要显示的东西放在双引号之间，譬如,或，David反斜杠n，但是如果我自己的名字本来就叫,“David“
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int A Well, one, function has called swap, takes one int called A, printf followed by another int called B, and as we've seen with print F, if you have multiple arguments, you separate them by commas.
好的，函数叫做swap，一个参数是，另一个参数是int，B，我们看到的,如果你有好几个参数，把它们用逗号分开。
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So we've seen a lot of this, for instance, in office hours and maybe you too have done or are currently doing this, but there's a problem with writing a statement, like print F, followed by, get int, alone.
我们看过很多这个，例如，在办公时间,可能你们做完了或还在做这个，但是写语句的时候有个问题，就像printf，紧跟着的是GetInt，单独的。
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So when you have a function called GetString, -- that means it's going to get a string from the user -- -- prompt the user for a string -- whereas printf is literally going to print it, not to paper, but to the screen.
所以当你有一个叫做GetSting的函数，它的意思是从用户那获得一个字符串-,提示用户输入一个字符串-,然而printf的确是用来打印的，不是在纸上，而是在屏幕上。
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As an aside, why are you able to use print F without writing out a prototype for it?
此外，为什么我们不用写printf的函数原型,而可以使用它呢？
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So before we use printf, a function, and we passed in one input and input henceforth we're gonna call arguments or parameters.
我们在使用printf函数时,先放进去一个输入，之后的输入我们就要,调用参数了。
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But if it does take input, you have to provide it in the form of arguments or parameters, like print F takes, generally, inside of those parentheses.
但是如果它获得了输入，你需要为它提供相应格式的,参数或参量，像printf的输入，一般地，在这些圆括号里。
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Someone-- or someone had to implement, had to write a tool called printf that itself takes input between quotes and produces as output some characters on the screen.
需要有人去实现，这个printf函数,以双引号间的信息为输入,输出相应字母到屏幕上。
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Just iterates from zero to Arg C. The indented line here print F is clearly printing a string, as per the percent S, but what is it printing?
只是从零开始迭代,到ArgC，这个缩进行printf显然是打印一个字符串,就像每一个%s，它在打印什么呢？
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- Well -- and I'll fix this blue next time -- I'm first telling the compiler I need access to the standard io library because printf is declared there.
哦！--下次我把这个字体颜色改成蓝色的-,我先告诉编译器--我需要使用,标准输入输出库,因为printf在那个库里面申明的。
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include stdio h The next line of code says include standard io.h which just as a little sanity check contains among other things, printf.
接着的一行代码写着,这个库文件包含一些我们常用的函数,譬如，printf函数。
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printf Well, notice I'm calling print F with percent C, and then I'm printing out each of these letters one at a time.
好的，请注意我用%c来调用，然后我打印出一个一个打印出这些字符。
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Now as an aside, turns out you can do more interesting formatting with printf, and this is useful even for ASCII art purposes.
说点题外话，结果你可以用printf来打印其他的格式,这是非常有用的,甚至是为了ASCII艺术的目的。
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