Answer by Markus Dutschke for What are the rules for calling the base class...
If you simply want to pass all constructor arguments to the base-class (=parent), here is a minimal example.This uses templates to forward every constructor call with 1, 2 or 3 arguments to the parent...
View ArticleAnswer by edW for What are the rules for calling the base class constructor?
If you have default parameters in your base constructor the base class will be called automatically. using namespace std;class Base{ public: Base(int a=1) : _a(a) {} protected: int _a;};class Derived :...
View ArticleAnswer by Krishna Oza for What are the rules for calling the base class...
Nobody mentioned the sequence of constructor calls when a class derives from multiple classes. The sequence is as mentioned while deriving the classes.
View ArticleAnswer by TT_ for What are the rules for calling the base class constructor?
Everybody mentioned a constructor call through an initialization list, but nobody said that a parent class's constructor can be called explicitly from the derived member's constructor's body. See the...
View ArticleAnswer by Dima for What are the rules for calling the base class constructor?
In C++ there is a concept of constructor's initialization list, which is where you can and should call the base class' constructor and where you should also initialize the data members. The...
View ArticleAnswer by Dynite for What are the rules for calling the base class constructor?
CDerived::CDerived(): CBase(...), iCount(0) //this is the initialisation list. You can initialise member variables here too. (e.g. iCount := 0) { //construct body }
View ArticleAnswer by puetzk for What are the rules for calling the base class constructor?
In C++, the no-argument constructors for all superclasses and member variables are called for you, before entering your constructor. If you want to pass them arguments, there is a separate syntax for...
View ArticleAnswer by CR. for What are the rules for calling the base class constructor?
The only way to pass values to a parent constructor is through an initialization list. The initilization list is implemented with a : and then a list of classes and the values to be passed to that...
View ArticleAnswer by Nils Pipenbrinck for What are the rules for calling the base class...
If you have a constructor without arguments it will be called before the derived class constructor gets executed.If you want to call a base-constructor with arguments you have to explicitly write that...
View ArticleAnswer by luke for What are the rules for calling the base class constructor?
Base class constructors are automatically called for you if they have no argument. If you want to call a superclass constructor with an argument, you must use the subclass's constructor initialization...
View ArticleWhat are the rules for calling the base class constructor?
What are the C++ rules for calling the base class constructor from a derived class?For example, I know in Java, you must do it as the first line of the subclass constructor (and if you don't, an...
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