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

M - algorithm corrections, Of course it is C[i] = A[i] + B[i].It was a typi...

Of course it is C[i] = A[i] + B[i].It was a typing mistake,never mind. You just understand the concept. 27-1 b. for grain-size=1 n=A.length grain-size=1 r=n for

Keywords in cpp, Define Keywords in C++ K e y w o r d s: ...

Define Keywords in C++ K e y w o r d s: K e y w o rd s a r e t h e w o rd s a l r e a d y u s e d b y C + + i n i t s c

Command-line arguments, Command-line arguments are passed into programs usi...

Command-line arguments are passed into programs using the arguments of main(). Here's a quick example, for a program called by typing "progname file.txt 1 2.7": #include #incl

Change to palindrome, A palindrome is a string that reads the same from bot...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Required audio expert in c# - create audio engine, Project Description: ...

Project Description: We want an EXPERT CODER to help us create an 'audio engine' in C#. We want to be able to specify an input of a wave/MP3 file, and have the engine manipul

#title, Given an integer n and a permutation of numbers 1, 2 ... , n-1, n w...

Given an integer n and a permutation of numbers 1, 2 ... , n-1, n write a program to print the permutation that lexicographically precedes the given input permutation. If the given

String, what is a string?

what is a string?

C++, #include long BixFunction(int x, int y = 5, float z = 5) { return...

#include long BixFunction(int x, int y = 5, float z = 5) { return(++x * ++y + (int)++z); } int main() { cout return 0; }

Verifone pos offline mod vx670, Verifone pos offline mod vx670 Project D...

Verifone pos offline mod vx670 Project Description: I want a programmer who will build custom application for Offline VX670 to collect and save info+pin 1) Press the am

Explain reference oddities, Reference Oddities A reference variable can...

Reference Oddities A reference variable can demote to any integer variable, be it in an array or a member variable from structure or class. Reference variables can demote to co

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