How to make inheritance C++?

Question

https://code.sololearn.com/cnfGEnsULrcA/?ref=app

Answer 1

class <class-name>: <visibility-mode> <name of the class from which will be inheritated>

visibility-mode: Three types: public, private or protected, which specifies that the inherited data will be public or private or protected in the derived class.

Ex.
class A
{
};
class B:public A
{
//code
};

Answer 2

ex.

class Myclass {
public:
void Sayhello () {
cout << "hello";
}
};

class myclassa: public Myclass {
sayhello ();
}

int main () {
myclassa a;
a.sayhello ();