No, you are right I stand corrected. I've been wrting too much bash and tcl lately :-)
On 11/20/2012 04:26 PM, Matthew Gillen wrote: > Are you sure about that Jerry? I've never seen the ampersand after > the variable name... > > Look at the examples here: > http://www.parashift.com/c++-faq/overview-refs.html > > > On 11/20/2012 04:17 PM, Jerry Feldman wrote: >> No, after msg. That means call by reference in C++ >> >> On 11/20/2012 03:33 PM, Greg London wrote: >>> Should I put the "&" in front of msg? i.e. >>> >>> void _say(const string &msg){ >>> >>> >>>> Almost perfect. I would make a few minor changes. >>>> >>>> void _say(const string msg&){ >>>> cout<<msg; >>>> } >>>> >>>> >>>> void Note(const string msg&){ >>>> _say("Note: "+msg); >>>> } >>>> >>>> Minor efficiencies. In your code in when note() is called the >>>> string is >>>> copied so msg is a copy of the input. In _say("Note: "+msg); >>>> you are creating a new string, but that string is also copied. >>>> Setting up >>>> a call by reference saves 2 copies in this case. The compiler can >>>> optimize the _say function to where the call by reference does not >>>> matter, but not the note() function which is external. >>>> >>>> >>>> -- >>>> Jerry Feldman <[email protected]> >>>> Boston Linux and Unix >>>> PGP key id:3BC1EB90 >>>> PGP Key fingerprint: 49E2 C52A FC5A A31F 8D66 C0AF 7CEA 30FC 3BC1 >>>> EB90 >>>> >>>> >>>> _______________________________________________ >>>> Hardwarehacking mailing list >>>> [email protected] >>>> http://lists.blu.org/mailman/listinfo/hardwarehacking >>>> >>> >> >> >> >> >> _______________________________________________ >> Hardwarehacking mailing list >> [email protected] >> http://lists.blu.org/mailman/listinfo/hardwarehacking >> > > _______________________________________________ > Hardwarehacking mailing list > [email protected] > http://lists.blu.org/mailman/listinfo/hardwarehacking > > -- Jerry Feldman <[email protected]> Boston Linux and Unix PGP key id:3BC1EB90 PGP Key fingerprint: 49E2 C52A FC5A A31F 8D66 C0AF 7CEA 30FC 3BC1 EB90
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