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#include <iostream>

class Base {

public:

virtual void A(float = 0.0);

virtual void B() const;

virtual void C();

virtual void D() final;

virtual void E() final = 0; // HMM ok, but is weird!!

};

class Derived : public Base {

public:

virtual void A(float) override; // OK

virtual void B() const override; // function profile must be exactly the same as base class!

//virtual void D() override; // error, no function to override

void test() {

int override = 10; // OK since override is NOT a keyword, but an identifier

}

// virtual void D(); // error, since Base::D() is final!

};

// final class, error since there are abstract functions in Base

//class Final final : public Base { };

//class D2 : public Final {}; // error since Final is final

class Foo {

public:

Foo(int n) {} // custom constructor so no default constructor is created

Foo() = default; // re-install default constructor

~Foo() = default; // ok

Foo(const Foo&) = default; // ok

//Foo(const char* a) = default; // error, can only default functions that have a default

// DELETE

Foo(long long) = delete; // dont allow (no implicit conversion to int version allowed)

Foo& operator=(const Foo&) = delete; // disallow assignment operator

};

int main(int argc, const char *argv[])

{

return 0;

}