So we've got the root here of the--and then the trunk and then up above, this florid canopy would musically be the what?
我们来看看这里的根,然后是树干再往上,样华丽的树冠在音乐上被称为什么呢?
And then the third law comes in, and that's the depressing part here.
然后第三定律跳出来,这里就是杯具的所在。
And we will then get over to here, where he's sitting on the tonic chord, and we want to see how long he's going to hold this tonic chord. Okay?
接着再到这里来,他停在了主音和弦上,然后我们想看看他会在主音和弦上保持多久,好吧?
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。
But notice what this does. The first thing it does is, it says, let's check and make sure x is greater than or equal to 0. If it isn't, notice what's going to happen. None of that block is going to get executed, and it's going to come down here and print out a useful piece of information, which says, hey, you gave me a negative number. I don't know how to do this.
做的是和以前一样的事情,但是注释它做了什么,第一件做的事情就是,程序说,要去检查并且确信x是大于等于0的,如果不是的话,请注意会发生什么,下面的代码都不会被执行,程序会到这里来然后显示一些有用的信息,信息会说,嘿,你给了我一个负数,我不知道该怎么弄这个了。
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