-
It's roughly the same size physically as those floppy disks and yet how many, how much, how many bytes fit on a typical hard drive today?
从物理大小上来说几乎相同,那么现在的硬盘的存储大小,一般有多少字节呢？
-
In fact to write a run those same experience-- those same experiments now with the even greater volume of data computers are now producing I'd probably have terabytes worth of data and at that point things just would have broken.
事实上-,目前使用大量数据的相同实验中,计算机会产生,兆兆字节的数据,那时，一切都有可能遭到破坏。
-
I have no idea what's here at the moment so I'm just going to draw a question mark because that memory might have been used previously for some other purpose, but we know it's currently available to us so we have four bytes of memory.
我不知道在此刻这里是什么,所以我画一个问号，因为那块内存可能在之前,为其它的目的而使用过，但是我们知道它可以为我们所使用,这样我们就有4个字节的内存。
-
Just the first one or more generally the address of the first one and then, man, I'll just figure it out from there where the rest of the letters are because by definition of a string, they're back to back to back.
只需要第一个字节的地址,然后，我可以指出之后的,剩下的字母,因为通过一个字符串的定义，它们是紧邻的。
-
And because there are a billion bytes accessible to us, that's-- essentially means well we can just call that byte number zero.
由于有十亿个字节的存储量供我们使用-,也就是说，我们有0号字节。
-
But the bits that actually compose those files and folders are in fact exactly where you left them.
但是组成这些文件和文件夹的字节,还在原来的地方存储着。
-
You've probably been surrounded for years now by bytes and kilobytes, and megabytes and terabytes, and the like.
也许你已经习惯使用,字节，千字节，兆字节，兆兆字节。
-
That is the address in memory in the heap of the first byte that the user typed in.
那是用户输入的字符串第一个字节,内存中堆的地址。
-
Well, this is just a way of saying not bits, but units of eight bits at a time.
好，这里可能不用说比特，而是说以八个比特为单位的字节。
-
This thing, if you now go ahead and very gently corrupt a few of the bytes, you can see that you can push down on that thing pretty easily.
如果我们很小心的,损坏了若干字节，你将会发现很容易把这个东西推下去。
-
Here I actually need to tell the computer, "Give me some bytes in ram in which to store a value, and that value's going to be a floating point value."
这里我的确需要告诉计算机，“给我一些字节内存,来存储一个值，那个值将是,浮点型的数值“
-
It's just a little block of memory in RAM, you know, that represents four bytes, 32-bits and the Number Two is currently in it.
它只是一小块内存块，它表示4个字节，32位,那个数字2就存储在里面。
-
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。
-
The things we've had in cameras for several years by putting gigabytes, soon hopefully terabytes of storage on a device that has no moving parts.
几年来我们可以在相机的存储设备,里存入千兆字节，甚至不久以后可以存入兆兆字节,设备里没有移动部件。
-
It's just some random chunk of four bytes that happens to be available at this point in time, but I can put something there.
只是一些随机的四字节的内存块,在这里是可以使用的，但是我可以在那里放置东西。
-
- Is it a character of eight bytes -- sorry -- eight bits, eight bits, eight bits, and I've done the same picture on the board.
它是一个8字节的字符--对不起-,8位，8位，8位，我在黑板上画了个一样的图。
-
So unfortunately, we had just ruined roughly 1.4 million bytes worth of data.
不幸的是，我们已经破坏了,140万个字节的数据。
-
That generally is just modifying a few bytes, a few kilobytes worth of information.
这个操作通常只是修改了几个，或者几千字节的有价值的信息。
-
You can number every single byte just like you can number every house on a street.
你可以给每个字节编号,就像你给街上每栋房子编号一样。
-
Well, RAM you might have a gigabyte RAM of RAM these days or two gigabytes.
你们应该都有一个十亿字节,或二十亿字节的。
-
Even though there's four bytes the length of the string is consistent with what a human being would interpret as the length 3 of the string which is 3.
即使那里有4个字节,字符串的长度,与我们所认为的长度是一致的,字符串的长度是。
-
We can call this byte number one, byte number two, byte number three.
号字节，2号，3号等等。
-
It just needs to know how many bytes of memory do you want?
它需要知道你想分配多少字节的内存？
-
And for that I need a byte of volunteers, alright?
为此，我需要一个字节的志愿者，谁来？
-
A string is a contiguous sequence of characters aka bytes.
字符串就是一串,字符，亦称字节。
-
>> Those bytes in the row are called-- >> A string.
>，这一行字节就是所谓的-,>>，字符串。
-
Alright! We now have a byte's worth of volunteers.
好，我们现在有一个字节的志愿者。
-
And so this is why in problem set 5 last year when I took photographs on campus with a compact flash card, just standard consumer media and I accidentally formatted that compact flash card, I only lost the first few kilobytes, the first few thousand bits on that compact flash card.
这也是去年的套题5中,我们在校园里面用配有，简易闪存卡的标准摄像机拍照片,我不小心格式化了这个简易闪存卡,其实我只是丢失的最开头的几千个字节的数据。
-
D-A-V-I-D Well, if I've got a five-letter word like D-A-V-I-D, well, that's like five bytes and yet we only have the ability thus far in this class to return one thing at a time I can't return five bytes to you, but wait a minute, those bytes by nature of a computer are just stored in RAM.
好的，如果有5个字母的单词，如，那是5个字节,我们只能返回一个东西,而不能返回5个字节，等一下，这些字节被计算机本能地,存储在内存中。
-
Even though we say gigabyte that really means billion bytes.
我们所说的十亿字节就是有十亿个字节。
应用推荐