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make explanation richer

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JongChan Choi 2013-09-21 05:01:47 +09:00
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@ -67,8 +67,10 @@ This program takes two numbers for input, and multiplies them.
The gist is it first reads in two inputs. Then it starts the outer loop,
conditioned on cell #1. Then it moves to cell #2, and starts the inner
loop conditioned on cell #2, incrementing cell #3. However, there comes a
problem: at the end of the inner loop, cell #2 is zero. To solve this problem,
problem: At the end of the inner loop, cell #2 is zero. In that case,
inner loop won't work anymore since next time. To solve this problem,
we also increment cell #4, and then recopy cell #4 into cell #2.
Then cell #3 is the result.
```
And that's brainfuck. Not that hard, eh? For fun, you can write your own