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
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