Virtual Function Example, C++ (clang)

Virtual Function Example

// Example with a Abstract Base Class
// Note the different behavior when the
// base class function is declared virtual
// and when it is not...

#include <iostream>
using namespace std;

class Cat
{
public:
    void whatAmI() const {cout<<"\n I am a Cat\n";};
    //virtual void whatAmI() const = 0;
};

class OrangeCat : public Cat
{
public:
    virtual void whatAmI() const {cout<<"\n I am an Orange Cat\n";};
};

class CuteOrangeCat : public OrangeCat
{
public:
    void whatAmI() const {cout<<"\n I am a Cute Orange Cat\n";};
};

class FuzzyCuteOrangeCat : public CuteOrangeCat
{
public:
   void whatAmI() const {cout<<"\n I am a Fuzzy Cute Orange Cat\n";};
};

void printWhatAmI(const Cat & cat)
{
    cat.whatAmI(); 
}

void printWhatAmI2(const OrangeCat & cat)
{
    cat.whatAmI(); 
}

int main() {
    
    cout << endl << " *** Example Program for Virtual Functions *** " << endl;
        
    OrangeCat myOrangeCat;
    CuteOrangeCat myCuteOrangeCat;
    FuzzyCuteOrangeCat myFuzzyCuteOrangeCat;
    
    cout << endl << "Calling printWhatAmI with OrangeCat instance... " << endl;
    printWhatAmI(myOrangeCat);

cout << endl << "Calling printWhatAmI with CuteOrangeCat instance... " << endl;
    printWhatAmI(myCuteOrangeCat);
    
    cout << endl << "Calling printWhatAmI with FuzzyCuteOrangeCat instance... " << endl;
    printWhatAmI(myFuzzyCuteOrangeCat);
    
    cout << endl << "Calling printWhatAmI2 with OrangeCat instance... " << endl;
    printWhatAmI2(myOrangeCat);
    
    cout << endl << "Calling printWhatAmI2 with CuteOrangeCat instance... " << endl;
    printWhatAmI2(myCuteOrangeCat);
    
    cout << endl << "Calling printWhatAmI2 with FuzzyCuteOrangeCat instance... " << endl;
    printWhatAmI2(myFuzzyCuteOrangeCat);
    
    return 0;
}


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