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C++ Fundamentals for Professionals

- Example

Explore how constructor inheritance functions in C++ by examining Base and Derived class examples. Understand how constructors are called for different data types and how public inheritance affects constructor behavior, preparing you for practical exercises in this essential C++ topic.

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Example: Constructor inheriting #

C++
#include <iostream>
#include <string>
class Base{
 public:
    Base() = default;
    Base(int i){
      std::cout << "Base::Base("<< i << ")" << std::endl;
    }
    Base(std::string s){
      std::cout << "Base::Base("<< s << ")" << std::endl;
    }
};
class Derived: public Base{
  public:
    using Base::Base;
    Derived(double d){
      std::cout << "Derived::Derived("<< d << ")" << std::endl;
    }
};
int main(){
  // inheriting Base
  Derived(2011);         // Base::Base(2011)
  // inheriting Base     // Base::Base(C++0x)
  Derived("C++0x");
  // using Derived
  Derived(0.33);         // Derived::Derived(0.33)
}
...