Inheritance (extending Class)
1. Answer the questions (i) to (iv) based on the following code :
class CUSTOMER
{
int Cust_no;
char Cust_Name[20];
protected:
void Register();
public:
CUSTOMER();
void Status();
};
class SALESMAN
{
int Salesman_no;
char Salesman_Name[20];
protected:
float Salary;
public:
SALESMAN();
void Enter();
void Show();
};
class SHOP : private CUSTOMER , public SALESMAN
{
char Voucher_No[10];
char Sales_Date[8];
public:
SHOP();
void Sales_Entry();
void Sales_Detail();
};
(i) Write the names of data members which are accessible from objects belonging to class CUSTOMER.
(ii) Write the names of all the member functions which are accessible from objects belonging to class SALESMAN.
(iii) Write the names of all the members which are accessible from member functions of class SHOP.
(iv) How many bytes will be required by an object belonging to SHOP.
2. Answer the questions (i) to (iv) based on the following:
class PUBLISHER
{
char Pub[12];
double Turnover;
protected:
void Register();
public:
PUBLISHER();
void Enter();
void Display();
};
class BRANCH
{
char CITY[20];
protected:
float Employees
public:
BRANCH();
void Haveit();
void Giveit();
};
class AUTHOR : private BRANCH , public PUBLISHER
{
int Acode;
char Aname[20];
float Amount;
public:
AUTHOR();
void Start();
void Show();
};
(i) Write the names of data members, which are accessible from objects belonging to class AUTHOR.
(ii) Write the names of all the member functions which are accessible from objects belonging to class BRANCH.
(iii) Write the names of all the members which are accessible from member functions of class AUTHOR.
(iv) How many bytes will be required by an object belonging to class AUTHOR?
3. Answer the questions (i) to (iv) based on the following code:
class Dolls
{
char DCode[5];
protected:
float Price ;
void CalcPrice(float);
public:
Dolls( );
void DInput( );
void DShow( );
};
class SoftDolls: public Dolls
{
char SDName[20];
float Weight;
public:
SoftDolls( );
void SDInput( );
void SDShow( );
};
class ElectronicDolls: public Dolls
{
char EDName[20];
char BatteryType[10];
int Battieries;
public:
ElectronicDolls ( );
void EDInput( );
void EDShow( );
};
(i) Which type of Inheritance is shown in the above example?
(ii) How many bytes will be required by an object of the class ElectronicDolls?
(iii) Write name of all the data members accessible from member functions of the class SoftDolls.
(iv) Write name of all the member functions accessible by an object.
4. Consider the following class declaration and answer the question below :
class university {
int noc;
protected;
char uname[25];
public:
university();
char state[25];
void enterdata();
void displaydata();
};
class college:public university{
int nod;
char cname[25];
protected:
void affiliation();
public:
college();
void enrol(int ,int);
void show();
};
class department:public college{
char dname[25];
int nof;
public:
department();
void display();
void input();
};
(i) Which class’s constructor will be called first at the time of declaration of an object of class department?
(ii) How many bytes does an object belonging to class department require?
(iii)Name the member function(s), which are accessed from the object of class department.
(iv) Name the data member, which are accessible from the object of class college.
5. What do you understand by the term Inheritance? Explain with suitable example.
6. How many types of Inheritance is possible? Explain each of them with suitable examples.
Please click on below link to download CBSE Class 12 Computer Science Inheritance Worksheet Set A
