Weird typo leads to interesting result... what does it mean?

Hi,
While writing some C++ code, I made a typo, which produced a bizarre but in interesting result in program. However, I completely do not understand what it is doing. Can anyone make sense of this?

Code:

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int a; // This can be any number from 0..255
int b; // This can be any number from 0..255
if(abs(a-b<2))
    return true;
return false;

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I wrote it as a typo, but it is having an effect I can't otherwise duplicate. Can anyone understand this?
Thanks

Quote:

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Originally Posted by pollypocket4eva

I wrote it as a typo

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You wrote what as a typo?

1) that code
2) some part of that code
3) some other part of that code
4) your post

The typo was:
if(abs(a-b<2))
instead of:
if(abs(a-b)<2)

Within the context of a much larger program, it's having a funny effect. But I was just wondering if anyone could help me understand what this line does.

Quote:

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Originally Posted by pollypocket4eva

it's having a funny effect.

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This "funny effect" is:

1) ha-ha, ROFL funny
2) kind of strange funny
3) just plain funny!
4) indescribably funny

I'm being serious, BTW. You will get a quicker answer to your questions if you make some attempt to include relevant information.

However, as a clue, this:

Code:

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(a-b<2)

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will yield either 0 or 1, regardless of the value of a & b.

Code:

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abs(a-b<2)

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1 if (a-b)<2, 0 otherwise.

Code:

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abs(a-b)<2

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1 if abs(a-b)<2, 0 otherwise.

abs(1) is 1, and abs(0) is 0.