cppTemplateInheritanceBasics

#include <iostream>

template <typename T>
class BaseA
{
public:
    T valA;
public:
    BaseA() : valA { 1 } { std::cout << "BaseA DEFAULT ctor\n"; }
    BaseA(T valAP) : valA{valAP} { std::cout << "BaseA ctor valA\n"; }
    ~BaseA() { std::cout << "BaseA dtor\n"; }
};

template <typename T2>
class Child : public BaseA<T2>
{
protected:
    T2 childVal;
public:
    Child() : BaseA{111}, childVal{ 3 } { std::cout << "Child DEFAULT ctor\n"; }
    Child(T2 childValP) : childVal{ childValP } { std::cout << "ChildA ctor childValP\n"; }
    ~Child() { std::cout << "Child dtor\n"; }
};

int main()
{
    Child<int> mChild{ 111 };

}