Question

What happens when a class inherits from multiple abstract classes when 2 or more of them have a function with the same name, return type, and arguments?

Assuming all functions here are virtual

Thanks

class C inherits from A and B at the same time and both A & B have virtual void func(int h);

Answer 1

If this is what you mean,

#include <iostream.h>
 class A
 {
 public:
     virtual void a_show()=0;
     virtual void show()
     {
         cout<<"A";
     }
 };
 class B
 {
 public:
     virtual void b_show()=0;
     virtual void show()
     {
         cout<<"B";
     }
 };
 class C : public A, public B
 {   
     virtual void a_show()
     {}
     virtual void b_show()
     {}
 };
 void main()
 {
     C s;
     s.show();
 }

The code gives an error with VC++ like

error C2385: 'C::show' is ambiguous

You need to declare show like this :

#include <iostream.h>
 class A
 {
 public:
     virtual void a_show()=0;
     virtual void show()
     {
         cout<<"A";
     }
 };
 class B
 {
 public:
     virtual void b_show()=0;
     virtual void show()
     {
         cout<<"B";
     }
 };
 class C : public A, public B
 {   
 public:
     virtual void a_show()
     {}
     virtual void b_show()
     {}
     void show()
     {
         cout<<"C";
     }
 };
 void main()
 {
     C s;
     s.show();
 }

This sure will give C