How to deal with several pure virtual functions ?

[zesan]

When I was implementing single pure virtual function it was working but now I have two which are not working, can anybody please help me out ?

#include <iostream>
#include <string>
using namespace std;

class Base
{
public :

Base(){};

virtual ~Base (){};

virtual void shuffle(unsigned int steps) = 0;       

virtual  unsigned int getBlock( unsigned int x,  unsigned int y  )=0;
};


class Derived1:virtual public Base
{
 void shuffle(unsigned int steps) 

{
    
    }

};


class Derived2:public Base
{
    public :
    
unsigned int getBlock( unsigned int x,  unsigned int y  ) 
{
 
}
        };

int main()
{
Base *b;

Derived1 q;
 b = &q;
 b->shuffle(1);
 
 Derived2 d;
 b = &d;
 b->getBlock(0,15);
 
 return 0;
 
 
}

[dhayden]

Line 47. If that was b->getBlock(0,15) then what would get called?

Since you haven't defined Derived1::getBlock(), it too is an abstract class.

[gunnerfunner]

Couple of useful specifiers vis-a-vis virtual functions:
http://en.cppreference.com/w/cpp/language/final
http://en.cppreference.com/w/cpp/language/override