Constructors and Virtual
Author
Can you call another constructor in one constructor?
And
How do you call a function of a parent class in the child class
(equivalent to the MyBase keyword in vb.net)
You can't call a differnt constructor of the same class in a constructor, but you can call the constructor of a base class. To call a base class's version of a function, you prefix a call with the base class's name + :: ex:
class MyBase { public: MyBase(int i) { /* stuff */ } void my_function(void) { std::cout << "Base" << std::endl; }};class MyClass : public MyBase { public: MyClass() : MyBase(42) { /* stuff */ } void my_function(void) { MyBase::my_function(); }};
And it works the same for virtual functions as well. You need to tell the compiler which veresion of the function you want by qualifying it (or not):
#include <iostream>class base {public: virtual void vfunction() { std::cout << "base::vfunction()" << std::endl; }};class derived : public base {public: void vfunction() { std::cout << "derived::vfunction()" << std::endl; } };int main() { base * pb = new derived; // initialize a base pointer to derived pb->vfunction(); // calls derived::vfunction() pb->base::vfunction(); // calls base::vfunction() delete pb; return 0;}This topic is closed to new replies.
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