a Question of : and ,

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Hello.
what is the role of ":" and "," on this function?

VB

GameTime(const log & c, const log & s) : M_cycle(c), M_stopped(s)

Thanks.

Posted 22-Nov-11 3:24am

smss IR

Updated 23-Nov-11 9:02am

v3

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2 solutions

Solution 2

Multiple inheritance
In C++ it is perfectly possible that a class inherits members from more than one class. This is done by simply separating the different base classes with commas in the derived class declaration. For example, if we had a specific class to print on screen (COutput) and we wanted our classes CRectangle and CTriangle to also inherit its members in addition to those of CPolygon we could write:

VB

class CRectangle: public CPolygon, public COutput;
class CTriangle: public CPolygon, public COutput;

"quoted from outside source"

So ,

":" means that GameTime inherits M_cycle and (",") M_stopped ...

P.S. What does US flag in Your profile means ??? Just out of curiosity ...

Edit : Solution 1 is probably what You are after, as I was thinkin of classes and You stated clearly it was the function ..

Posted 22-Nov-11 3:36am

RKnGl

Updated 22-Nov-11 3:40am

v2

Comments

Albert Holguin 22-Nov-11 10:47am

What does the US flag mean? ...means he's indicated that he's located in the US... have you looked at your profile? You have a flag as well...

CPallini 22-Nov-11 13:35pm

Well, there is no multiple inheritance in the code posted.

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CPallini · Accepted Answer · 2011-11-22T03:33:00

Solution 1

They are simply syntax tokens of the C++ constructor initializer list, see, for instance: "Initializing base classes and members"[^].

Posted 22-Nov-11 3:33am

CPallini

Comments

Albert Holguin 22-Nov-11 10:47am

that's it... +5

CPallini 22-Nov-11 13:33pm

Thank you.

Sergey Alexandrovich Kryukov 22-Nov-11 17:20pm

Correct, and yes, not related to multiple inheritance. My 5.
--SA

CPallini 23-Nov-11 3:59am

Thanks.

elgaabeb 23-Nov-11 10:03am

all about it ... 5'd.