当我在高中上计算机课的时候，我们在一个普通的教室里上课——没有电脑。我们所有的测试都是在纸上完成的，一张纸上有一节课。我们的老师是第一次用c++授课，偶尔会在黑板上切换到Pascal模式。这很尴尬，因为我们中很少有人对学习帕斯卡感兴趣。

对于比课堂作业更大的作业，我们会在家里做，并提交代码和输出打印结果来评分。在提交了一些代码+输出输出后，我们共同意识到老师实际上并没有阅读代码-只是打印输出。为了测试我们的理论，我在代码的第三页放了一条注释——就在一些类声明之间:

// If you are reading this, please place a checkmark here [  ]

当然，我把它拿回来的时候，前面有一个大大的蓝色“a”，没有任何标记。

Re eating one's own dogfood: We have the same term in our workplace (granted, only because I introduced it). My code is peppered with comments that say "TODO" and indicate something that ought to be done eventually, but a comment saying "DOGFOOD" (both keywords are always at the beginning of the comment, in all caps) means something that must be done before this program can be used even internally. It's a handy thing to search for, as the word "dogfood" is never going to appear in a quoted string - if it does, I can always just say "dog-food" or something - so even a case-insensitive search will come up with the right results.

Regarding zeroing the accumulator: I've done exactly the same thing when programming an Intel 80x86 (I started on the 8086 and moved up from there into the modern Pentiums). XORing a register with itself is the quickest and tightest way to clear it. Using "MOV AX,0" requires three bytes (opcode and two bytes of literal 16-bit zero), whereas "XOR AX,AX" is only two; it's even more noticeable with the 386-and-higher extended registers, where "MOV EAX,0" requires five bytes (four bytes of 32-bit zero). My C/C++ compiler always zeroes registers this way, so I'd assume it's still the best way (although I haven't studied opcode timing tables in ages, and probably both XOR reg,reg and MOV reg,imm take one clock).

//你不需要理解这个

经典。

我想我有过这样的经历:

if (case1) { // trivial
...
}
else { // we are screwed
 /* fill in later */
}

好吧，我可能用了一个比搞砸更强烈的词

这是我自己代码中的一个，但它仍然非常有趣，我认为最好还是把它放在网上，因为它是在公共SVN中。

// These were orginally up and down. When it was clear the names were
// inapplicable, they were renamed to retain the joke.
// Sorry if you were hoping for useful variable names.
quantum strange, charm;

在拉丁语中，从但丁的《神曲》中进入这里的人，请放弃希望。