Explain nested classes, C/C++ Programming

Assignment Help:

Nested Classes

Many a times, it becomes essential to have a class contain properties of two other classes. One way is to explain a class within another - that is a class with member classes also known as nested classes. This has nothing to do with inheritance. Another way is multiple inheritance , which will be discussed later.

e.g.

                class Aclass

                 {

                  public :

                                                Aclass(int pv)

                                                 {

                                                                private_variable_A = pv;

                                                 }

  private :

                                                int private_variable_A;

                                  };

 

                class Bclass

                 {

                  public :

                                                Bclass(int bpv, int apv): Aobj(apv)

                                                 {

                                                                private_variable_B = bpv;

                                                 }

                  private :

                                                int private_variable_B;

                                                Aclass Aobj;        // Declaring an object here.

                  };

 

As can be seen , the class Bclass have an object Aobj in its private section as one of its members. Also, it have a constructor function with the similar name, to which the two variables passed are bpv and apv. The variable bpv is used to initialize the private variable of Bclass.

Though, the constructor contains something after the colon. The part after the colon in the definition of a constructor is known as initialization section and the actual body of the constructor is known as assignment section . Initialization section initializes the base class members, while assignment section contains statements to initialize the derived class members.

 


Related Discussions:- Explain nested classes

C#, 1. write a program named InputMethodDemo2 that eliminates the repetitiv...

1. write a program named InputMethodDemo2 that eliminates the repetitive code in the InputMethod() in the InputMethodDemo program. Rewrite the program so the InputMethod()contains

Example of pointers, #include "stdafx.h" #include iostream using name...

#include "stdafx.h" #include iostream using namespace std; int _tmain(int argc, _TCHAR* argv[]) {             int NumbHold[5];             int * ptrNumb;

#area under curve, #Write a program to find the area under the curve y = f(...

#Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b.   #include float start_poi

What does this mean that "friendship isn''t transitive, What does this mean...

What does this mean that "friendship isn't transitive, inherited or reciprocal"? A: As I grant you friendship access to me doesn't grant your kids automatically access to me, do

Overloading unary operators, Overloading Unary Operators class sign ...

Overloading Unary Operators class sign {int a,b,c; public: sign(){}; sign(int,int,int); void putdata(void); void operator-(); }; void sign::operator-() {a=

Define the int data type of c language, Define the Int Data Type of C Langu...

Define the Int Data Type of C Language? The int is used to define integer numbers. The Integers are whole numbers with a range of values supported by a particular machine and t

Graphic.h, what is the syntax to get a coloured output.

what is the syntax to get a coloured output.

Tell what the derived class inherits or doesn''t inherit?, Tell what the de...

Tell what the derived class inherits or doesn't inherit? A: Inherits: - All data member defined in the parent class (even though such members might not always be accessible

Conversion operator, What is conversion operator? Explain it with example.

What is conversion operator? Explain it with example.

Java code, Calculate the salary if the person work 8 hours/day and the sala...

Calculate the salary if the person work 8 hours/day and the salary/hour is RM5.20 - UML class diagaram -Class -Exception handling/assertion

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd