Extends abstract class : abstract class « Class « Visual C++ .NET

1. Visual C++ .NET
2. Class
3. abstract class

Extends abstract class

 
#include "stdafx.h"
using namespace System;

ref class AbstractBaseClass abstract{
protected:
    int AbstractVar;
    AbstractBaseClass(int val): AbstractVar(val) {}
public:
    virtual void Method1() = 0;  // unimplemented method
    virtual void Method2() = 0;  
    void Method3()
    {
        Console::WriteLine(AbstractVar.ToString());
    }
};

ref class MidAbstractBaseClass abstract : public AbstractBaseClass
{
public:
    virtual void Method1() override sealed
    {
        Console::WriteLine((AbstractVar * 3).ToString());
    }
protected:
    MidAbstractBaseClass(int val) : AbstractBaseClass(val) {}
};

ref class DerivedExClass : public MidAbstractBaseClass
{
public:
    DerivedExClass(int val) : MidAbstractBaseClass(val) {}
    virtual void Method2() override
    {
        Console::WriteLine((AbstractVar * 2).ToString());
    }
};

void testMethod(AbstractBaseClass ^aec)
{
    aec->Method1();
    aec->Method2();
    aec->Method3();
}

void main()
{
    AbstractBaseClass ^Ab1 = gcnew DerivedExClass(5);
    Ab1->Method1();
    Ab1->Method2();
    Ab1->Method3();

    AbstractBaseClass ^Ab2 = gcnew DerivedExClass(6);
    testMethod(Ab2);

    DerivedExClass ^dc = gcnew DerivedExClass(7);
    testMethod(dc);
} 

   
  

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