I am looking again at inheritance and virtualisation, and by mistake I used parenthesis to create my derived grandchild object in main, 'ryan.'
It ran fine the second time when I took away the () argument brackets, but when I used () it skipped the constructor for grandchild, and also all of the other constructors and destructors.
Can somebody explain what is happening here under the hood, I figured that would still work the same.
#include <iostream>
class Base {
public:
int age=5;
Base() {std::cout << "Base Created" << std::endl;}
virtual ~Base() { std::cout << "Base Deleted" << std::endl; }
};
class son : public virtual Base {
public:
// int age = 1;
son(std::string name) { std::cout <<"son created" << std::endl; }
son() { std::cout << "son created - default constructor" << std::endl; }
~son() { std::cout << "son deleted" << std::endl; }
};
class sonwife : public virtual Base {
public:
// int age = 2;
sonwife() { std::cout << "son wife created - default constructor" << std::endl; }
sonwife(std::string name) { std::cout << "son wife created" << std::endl; }
~sonwife() { std::cout << "sons wife deleted" << std::endl; }
};
class grandchild : public sonwife, public son
{
public:
grandchild() { std::cout << "Grand child created" << std::endl;
std::cout << age;
}
~grandchild() { std::cout << "grand child gone!" << std::endl; }
};
int main()
{
Base *b = new son("Ryan");
delete b;
grandchild ryan; // vs. grandchild ryan();
return 0;
}
