Page 192 - DCAP404 _Object Oriented Programming

Unit 9: Inheritance

public: Notes
void display (void);};
void result : : display (void)
{
total = part1 + part2 + score;
put_n ( );
put_m ( );

put_s ( );
cout << “Total score: “<<total<< “\n”;
}
main ( )
{
clrscr ( );
result S1;

S1.get_n (347);
S1.get_m (30, 35);
S1.get_s (7);
S1.dciplay ( );
}

Did u know? What are the advantages of inheritance?
Inheritance offers the following advantages:
Development model closer to real life object model with hierarchical relationships

Reusability — facility to use public methods of base class without rewriting the same
Extensibility — extending the base class logic as per business logic of the derived class
Data hiding — base class can decide to keep some data private so that it cannot be altered
by the derived class.
Self Assessment

Fill in the blanks:
5. In “single inheritance,” a common form of inheritance, classes have only one ……………….
class.

6. When a derived class privately inherits a base class, all the public members of the base
class become …………………….. for the derived class.
7. The base class from which each class is derived is declared before the declaration of the
…………………… class.
8. An indirect base class is a base class that does not appear directly in the …………………….
of the derived class but is available to the derived class through one of its base classes.

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