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Question
What are the points to be noted while deriving a new class?
Solution
The following points should be observed for defining the derived class:
- The keyword class has to be used.
- The name of the derived class is to be given after the keyword class.
- A single colon.
- The type of derivation (the visibility mode), namely private, public, or protected. If no visibility mode is specified, then by default the visibility mode is considered as private.
- The names of all base classes (parent classes) separated by a comma.
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Name the base class(/es) and derived class (/es).
Consider the following c++ code and answer the question?
class Personal
{ int Class,Rno;
char Section;
protected:
char Name[20];
public:
personal();
void pentry();
void Pdisplay(); };
class Marks:private Personal
{ float M{5};
protected:
char Grade[5];
public: Marks();
void Mentry();
void Mdisplay(); };
class Result:public Marks
{
float Total,Agg;
public:
char FinalGrade, Commence[20];
Result();
void Rcalculate();
void Rdisplay();
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Write the names of data members accessible from the object of class Result.
Consider the following c++ code and answer the question?
class Personal
{ int Class,Rno;
char Section;
protected:
char Name[20];
public:
personal();
void pentry();
void Pdisplay(); };
class Marks:private Personal
{ float M{5};
protected:
char Grade[5];
public: Marks();
void Mentry();
void Mdisplay(); };
class Result:public Marks
{
float Total,Agg;
public:
char FinalGrade, Commence[20];
Result();
void Rcalculate();
void Rdisplay();
};
Write the names of all member functions accessible from the object of class Result.
Consider the following c++ code and answer the question?
class Personal
{ int Class,Rno;
char Section;
protected:
char Name[20];
public:
personal();
void pentry();
void Pdisplay(); };
class Marks:private Personal
{ float M{5};
protected:
char Grade[5];
public: Marks();
void Mentry();
void Mdisplay(); };
class Result:public Marks
{
float Total,Agg;
public:
char FinalGrade, Commence[20];
Result();
void Rcalculate();
void Rdisplay();
};
Write the names of all members accessible from member functions of class Result.
