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Newsgroups: comp.lang.c++
Subject: Re: Conversion of a number from string to vector<int>
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From: Lasse Reichstein Nielsen <lrn.unread@gmail.com>
Date: Mon, 20 Jun 2011 22:47:04 +0200
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.c++:6978

"Paul" <pchristor@yahoo.co.uk> writes:

> I see some people are using the subtraction of char '0' technique, but
> this seems a bit weird to me as chars are not supposed to behave like
> that..

Like what?
The char type is an integral type. You can subtract them just fine.

> IIRC there is something in the standard about the chars '0' - '9'
> having special pirvaleges with arithmetic operators.

I doubt that.

> Does the following char arithmetic work?
>
> '4'  *  '2'

No, unless you want the result to be 2600.

> Will give us an integer value of 8? Sorry too lazy to check, I m
> having my morning tea :)

Not 8, no.

/L
-- 
Lasse Reichstein Holst Nielsen
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