(C++) To upcast, to cast up, upcasting

include <iostream>


//---------------------------------------------------------------------------
struct Base
{
  Base(const int& value) : mValueBase(value) {}
  virtual void doCout() const { std::cout << "Base: " << mValueBase << std::endl; }
  const int mValueBase;
};
//---------------------------------------------------------------------------
struct Derived : public Base
{
  Derived(const int& value1, const int& value2) : Base(value1), mValueDerived(value2) {}
  virtual void doCout() const
  {
    std::cout << "Derived: " << mValueBase << " " << mValueDerived << std::endl;
  }
  const int mValueDerived;
};
//---------------------------------------------------------------------------
void funcBase(const Base * base)
{
  //Does nothing
  std::cout << "funcBase called for Base with value " << base->mValueBase <<  std::endl;
  base;
}
//---------------------------------------------------------------------------
int main()
{
  const Derived * derived = new Derived(1,2);
  funcBase(derived); //Implicit upcast to Base*
  funcBase(dynamic_cast<const Base*>(derived)); //Explicit upcast to const Base*
  delete derived;
}

Code links

• ::,scope operator
• <<,stream out operator
• #include
• assert
• char
• class
• cout
• delete
• endl
• for
• #include
• int
• iostream
• main
• new
• return
• scope operator,::
• std
• stream out operator, <<
• struct