[HH] c++ strings?

[Matthew Gillen]

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 <gaf at blu.org>
>>> Boston Linux and Unix
>>> PGP key id:3BC1EB90
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>>>
>>>
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>>
>
>
>
>
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