D-A-V-I-D I'm not hardcoding in D-A-V-I-D anymore but I can still use a variable.
我不再把名字写死为,而是用一个变量来代替。
I'd like a wake-up call at 6:00 a.m., please.
我想要一个早晨6点的叫醒服务,谢谢。
to do sqrt, or square root-- no, I'm going to square root use sqrt, that's the name I'm using here-- square root a hundred different places in some piece of code. Without function, I'd have to copy that piece of code everywhere.
让我做一下准备,想象一下我要调用sqrt或者-,不,我会调用sqrt函数,这是我在这里用的名字,我得把这段代码到处复制。
Let me go ahead and call print F. I'm going to say A equals A and then I need a percent D, backslash, comma A; so this is a little bit of -- more syntax than would be nice, %d but I'm just saying, literally, A equals percent D, and I'm plugging in the value of A for percent D.
我们继续调用printf,我说明A等于,然后我需要%d,反斜杠n,逗号;,所以这个有点--偏向逻辑的,而不偏向美观的,但是我刚说了,字面上,A等于,我用%d插入了A的值。
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