Question

Question 2

Answer the questions (i) to (iv) based on the following:

class PRODUCT

{

int Code:

char Item[20];

protected:

float Qty;

public:

PRODUCT ( );

void GetIn( ); void Show( ):

};

class WHOLESALER

{

int WCode;

protected:

char Manager[20];

public:

WHOLESALER();

void Enter();

void Display ();

};

class SHOWROOM : public PRODUCT,

private WHOLESALER

{

char Name[20],City[20];

public:

SHOWROOM();

void Input ();

void View ( );

};

(i) Which type of Inheritance out of the following is illustrated in the above example?

(ii) Write the names of all the data members, which are directly accessible from the member functions of class SHOWROOM.

(ii) Write the names of all the member functions, which are directly accessible by an object of class SHOWROOM.

(iii) What will be the order of execution of the constructors, when an object of class SHOWROOM is declared?

Answer 1

Here is the answer of all 4 parts one by one.

i) MULTIPLE INHERITANCE

Reason: Since class "SHOWROOM" is inheriting more than one class i.e "PRODUCT" and "WHOLESALER"

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ii) The data members that are directly accesible in member function of SHOWROOM class are :

a) float Qty ------- from PRODUCT class

b) char Manager[20] ---------- from WHOLESALER class

Explanation: all other data members such as [  int Code, char Item[20] ] in PRODUCT class is private and also data member [ int WCode ] is private in WHOLESALER class. and you can not access a private member of a class to any other class.

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iii)

GetIn();
Show();

These two member function arefrom PRODUCT class and we can access them in SHOWROOM class.

Enter();
Display();

These two member function arefrom WHOLESALER class and we can access them in SHOWROOM class.

So all member function from both class are accessible in SHOWROOM class

Reason: Since all the member function are public, so all of them are accessible in SHOWROOM class

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iv) Order of execution of constructor:

PRODUCT()

WHOLESALER()

SHOWROOM()

Reason: Order of execution is defined by order of inheritance and when you make an object the super class constructor will be excuted first.