What is the output of the following C++ code?

Dharmendra Sir • 3.53K Points
Extraordinary

Q. What is the output of the following C++ code?

Code:

#include<iostream>

using namespace std;

class A {
public:
   void show()
   { cout <<" show() method of class A"; }
};

class B : public A {
public:
   void show()
   { cout <<" show() method of class B"; }
};

class C: public B {
}; 
  
int main(void)
{ 
  C c; 
  c.show(); 
  return 0; 
}

(A) “show() method of class A”
(B) “show() method of class B”
(C) Both A and B are true
(D) None of these

Correct Answer - Option(B)
Views: 179
Filed under category C++

Explanation by: Dharmendra Sir

The show() method is not defined in the C class. It is therefore searched in the inheritance hierarchy. show() is present in both classes A and B, which one should be called? The idea is the following: if there is a multi-level inheritance, the function is then searched linearly in the inheritance hierarchy until a matching function is found.

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