c++

Question

what is the answer in the inheritance?
Fill in the blanks to declare a ''B'' class with its own constructor and a ''D'' class with its own constructor, where ''D'' inherits ''B''.
B {
public:
() {
cout << "B's constructor"; }
};
class D : B {
() {
cout << "D's constructor"; }
};
B this D class public protected

please tell me answer now

Answer 1

std :: cout-----For what is commonly used this "std" and this" :: "
pls help i struggle with that

Answer 2

B {
public:
() {
cout << "B's constructor"; }
};
class D : B {
() {
cout << "D's constructor"; }
};
Answer plzz

Answer 3

Fill in the blanks to declare the class my_class with its constructor.

Answer 4

class B {
public:
B() {
cout << "B's constructor"; }
};
class D : public B {
this() {
cout << "D's constructor"; }
};