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If you want to control a program file, open, copy, paste not get me ready for my trip to Stanford.
如果想要掌控一项程序文件，打开，复制粘贴，并不会铺平通向斯坦福的路。
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Me and my friend went to the same university and went to the same exchange program to Canada
我们上了同一所大学，也参加了同一个到加拿大的交流项目，
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So you're telling me about this program: They're the only institution in America, there has an actual credited program which produces Muslim chaplains.
刚才你在跟我谈到这个项目：,他们是美国唯一的一所,培养穆斯林教士的有学分的项目。
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Here is a program that's a little useful in that it's just a little cheat sheet for me.
这里有个小程序，其中里面有个,备忘单对我是有点用的。
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This program can beat me blind.
这个程序瞎下都能击败我
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When the gentleman brought it and install it in my bedroom here, they gave me one simple sheet to tell me how to turn it on, how to get into the program, and then program really explain itself, really invites you to explore the pieces of it, by itself, I mean.
当他们把电脑带来,安装在我的房间里，给了一个简单的小册子,告诉我如何打开电脑，如何运行这个程序，然后程序就自动开始解释了，它让你去探索每个部分，自动的，我是说。
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So you say well, rather than rushing off and fixing this one bug, let me pull back and ask, bug is this a systematic mistake that I've made throughout the program?
因此我们应该回头想想,这是不是我在整个程序中都，在犯的一个系统性错误，而不是匆匆忙忙的去修复这一个,如果确实是系统性错误的话？
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Or a thing I made before, this was a HotOrNot program out of everyone's IDs at Harvard that almost got me kicked out.
在这之前，还用每个人的ID做过一个HotOrNot网站,我因此差点被开除。
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who are like little brothers to me now and yeah, it's a great program,
他们对我来讲就像是两个小弟弟。我们的项目意义非凡，
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Essentially, this command make is just another program that uses GCC to compile my program for me but make is configurable.
从本质上来看，make命令就是一个,调用GCC来编译我们程序的程序,只不过make是可以配置的。
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The beauty of this is, it keeps me from getting lazy, and not only testing my program and the thing that found the bug, but in all the things that used to work.
运行函数而不用再输入了，这其中的,美妙之处在于，它让我变的勤快了点,并不是仅仅的去测试程序发现bug方面，同样适用于那些正常工作的模块。
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I'm going to use my own special program that will color code things for me in class, but the idea is the same; it's a text editor.
我将用我自己专门的程序,那个会分类为我标出代码的颜色，但是那个思想是一样的，这是一个文本编辑器。
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Only the operating system has controlling of byte zero NULL in the computer's RAM and so if a function ever returns null, aka zero, well, something must have gone wrong because that can't possibly belong to me that memory because by human convention zero is owned by the operating system; not by a program I wrote.
只用操作系统在内存中能够控制,字节0，并且如果一个函数返回，或者说0，好的，可能出错了,因为那可能是不属于我的内存,因为惯例上，0是由操作系统拥有的,而不是由我的程序拥有的。
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long l So let me try this, long l, and then let me do a little Copy Paste here and say a long is actually the size of l. So let me quit that program; recompile.
让我们来试一下，然后我在这里复制粘贴一下,这里long的大小实际上是l的大小，所以让我退出,那个程序，重新编译。
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- This one was among our favorite-- "I was you at the CS50 Fair; I went to your station ; to see your program, you were my best friend; but when our hands touched as you handed me a Smiley face sticker, my heart skipped a beat.
这是我们最喜欢的-,“我和你一样在CS50大会上，我到你的网站看你的程序,你是我最好的朋友;,但是当我们牵手的时候,你传给我一张笑脸贴纸，我的心跳加速“
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So this program, if you run it based on intuition or little cheat sheets in front of you, what is this program ultimately going to do for me?
所以这个程序，如果你按照你的直觉,或你们面前的备忘单来执行它，这个程序最终会为我做什么？
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But I would choose to sit down for these particular projects right around midnight so that when I woke up my program was giving me the results I wanted.
我可能会,为了这些特殊的项目一直等到半夜,这样我醒来时,程序就能给我想要的结果。
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I've had graduate students come to me and say I found a bug in my program.
你该感到自豪么？经常有毕业生,来找到我并告诉我。
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- So in fact, if you want a super long number -- -- let me go ahead and reopen this program -- long you could declare long.
所以事实上，如果你需要一个超级长的数字-,让我们继续重新讨论这个问题-,你可以声明。
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I can certainly try to write the number 13 there, but bam, my program very likely will crash if this chunk of memory was not given to me previously by the operating system and maybe it is owned by the operating system.
我当然可以在那里写下数字13，但是“嘣“,如果这块内存不是系统预先给我的,我的程序很可能会崩溃,可能这块内存,是系统本身使用的。
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So let me go ahead and quit from this program.
退出这个程序，我们继续。
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So now let me recreate this program from memory.
现在我们在脑子里再过一遍这个程序。
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I included the length, let me go ahead and compile this program called Holloway.c. No errors which means that's good.
我包含了那个长度，我们继续,编译这个Holloway，c程序,零错误，非常好。
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So if I type "man sleep," this is going to give me the user's manual for a program called sleep, but there's a gotcha and the problem set it makes clear, sleep notice that it says at top left sleep one.
所以如果我键入“man，sleep“，它将,给我一个叫做sleep程序的用户手册，但是这里有个参考信息，它使问题更清晰，请注意它指明在左上角。
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I'm going to use the CS50 Library instead for user input I'm saying say something then I'd get a string from the user and I call time s1 and then I say, say something, s2 and then I get another string from the user and call it s2 and apparently this program's purpose in life is to tell me yes or no the user said the same thing both times.
然而我使用的是CS50库来获得用户输入,我说点什么，然后从用户那里获得一个字符串,并把它叫做s1，然后我说点什么，然后从用户那里获得一个字符串，并把它叫做2,这个程序的最终目的是,告诉我两次用户输入的是不是同样的东西。
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