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

Should i employ null or 0?, A: In C++, the definition of NULL is 0, thus th...

A: In C++, the definition of NULL is 0, thus there is only an aesthetic difference. I prefer to ignore macros, so I employ 0. Another difficulty with NULL is that people sometimes

Compiler design limiting instruction, Ravi is a newbie to the programming a...

Ravi is a newbie to the programming and while learning the programming language he came to know the following rules: · Each program must start with ''{'' and end with '

C program to print fibonacci series, C program to print fibonacci series: ...

C program to print fibonacci series: int fibo(long int); void main() {                 long int a=0,n;                 printf ("how many terms\n");

Theory, recursive sub programs

recursive sub programs

Padovan string, padovan string problem program 1 : package test.padovan...

padovan string problem program 1 : package test.padovanstring; public class PadovanString {     public int stringOccurrences(int n, String str){        if(n >= 40)

Create binomial tree, Create a function ValueDelta(char inName[], char outN...

Create a function ValueDelta(char inName[], char outName[]) that reads a text file with option specifications and writes the option values as well as Delta. The inName[] file conta

Create program to newtons method for cube roots, Newton's method for cube r...

Newton's method for cube roots is based on the fact that if y is an approximation to the cube root of x, then a better approximation is given by the value: (x/y 2 +2y)/3 (a)

Least cost method, c program to implement least cost method

c program to implement least cost method

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