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From: brucec@demiurge.WV.TEK.COM (Bruce Cohen;685-2439;61-028)
Newsgroups: comp.lang.c++,gnu.g++
Subject: Re: Where does this construct come from?
Message-ID: <4079@orca.WV.TEK.COM>
Date: 1 Aug 89 01:39:26 GMT
References: <2701@hsinchu.sw.mcc.com>
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Reply-To: brucec@demiurge.WV.TEK.COM (Bruce Cohen)
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Organization: Tektronix, Inc., Wilsonville, OR
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In article <2701@hsinchu.sw.mcc.com> knutson@hsinchu.sw.mcc.com (Jim Knutson) writes:
>What does this construct mean and where does it come from?
>
>class multi_v {
>public:
>	vect a, b, c;
>	multi_v(int i):a(i), b(i), c(i) { }
>	//            ^^^^^^^^^^^^^^^^^
>};

That's the way to pass arguments to the constructors of the member objects
a, b, and c, so they are constructed before the containing object.  This is
described in Stroustrup, pp. 159-161.

Bruce Cohen
brucec@orca.wv.tek.com
Interactive Technologies Division, Tektronix, Inc.
M/S 61-028, P.O. Box 1000, Wilsonville, OR  97070