That's called the initializer list. I suggest you get a book that explains these things. C++ Primer or The C++ Programming Language would be good. Here is a link that explains this particular topic: http://www.blueturnip.com/projects/edu/cs/cpp/initializer-lists.html -Uday On 3/20/06, Shriramana Sharma <samjnaa@xxxxxxxxx> wrote: > A header file contains the following class declaration: > > class CAA2DCoordinate > { > public: > //Constructors / Destructors > CAA2DCoordinate(): X(0), Y(0) {}; > > //member variables > double X; > double Y; > }; > > Now what I do not understand is the line: > > CAA2DCoordinate(): X(0), Y(0) {}; > > I would have thought it would be: > > CAA2DCoordinate() { X = 0; Y = 0; } > > just like the QDate constructor: > > QDate() { jd = 0; } > > What is the meaning of the colon ":" here, and what are the (0) things, and > why are X and Y *outside* the braces? > > Thanks for your patience. > > -- > > Tux #395953 resides at http://samvit.org > playing with KDE 3.51 on SUSE Linux 10.0 > $ date [] CCE +2006-03-20 W12-1 UTC+0530 > - > : send the line "unsubscribe linux-c-programming" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > - : send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
