Whats wrong with this C++ code...???

Question

Code is correct but it gives compile time error...

There is inheritance so base class method must be inherited in derived class which are public and protected but in this case that not happened.

https://code.sololearn.com/cAQidii984bD/?ref=app

Answer 1

There is inheritance so base class method must be inherited in derived class which are public and protected but in this case that not happened.

method of class A
void f(int x)
{
cout<<x;
}
must be inherited in class B.

//

if I removed method of class B i.e.
void f()
{
cout<<"b\n";
}

Then object of class B able to call method of class A
I.e.

B ob;
ob.f(7); // No error

it works correctly.

Answer 2

Class B’s method doesn’t take arguments, so the compiler doesn’t know what to do with the 7

Answer 3

add this

void f(int x)
{
cout<<x;
}

after line 26
this function will be executed if you pass arguments with f

Answer 4

This is standart behavior. If derived class declares method with the same name as a method defined by base class, derived class' method hides base class' one.
Solution:
Add after public in class B:
using A::f;
or when call method
ob.A::f(7);