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

When does a name clash occur in c++, A name clash happens when a name is de...

A name clash happens when a name is described in more than one place. For example, two dissimilar class libraries could give two different classes the similar name. If you try to u

What is a newline escape sequence, What is a newline escape sequence? -...

What is a newline escape sequence? - A newline escape sequence is signified by the \n character. - It is used to insert a new line whereas displaying the output data. - T

Inline functions, Inline functions, C++ provides inline functions to help r...

Inline functions, C++ provides inline functions to help reduce function_call overhead especially for small functions. The qualifier inline before function's return type in the f

Area, find area uder the curve y=f(x) between x=a and x=b   #incl...

find area uder the curve y=f(x) between x=a and x=b   #include float start_point, /* GLOBAL VARIABLES */ end_point, total_area; in

Sdsds, Given an integer n and a permutation of numbers 1, 2 ... , n-1, n wr...

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

Explain the terms- substitutability and extensibility, Explain the terms- S...

Explain the terms- Substitutability and Extensibility Substitutability - The objects of a properly derived class can be safely and easily substituted for an object of its

Using the substitution model illustrate the process, Each of the following ...

Each of the following two procedures defines a method for adding two positive integers in terms of the procedures inc, which increments its argument by 1, and dec, which decrements

Write the recursive bisection root finding function, Rewrite the recursive...

Rewrite the recursive bisection root finding function from lecture to be iterative (using a while loop). The function declaration should be root = bisectIter(f,a,b,tol). The input

Pseudo code, pseudo code that will determine if the number is prime or comp...

pseudo code that will determine if the number is prime or composite

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