Explain static class members, C/C++ Programming

Assignment Help:

Static Class Members

As we already know all the objects of the class have dissimilar data members but invoke the similar member functions. Though, there is an exception to this rule. If the data member is declared with the keyword static, then only one such data item is formed for the entire class, no matter how many objects it has. Static data members are useful, if all objects of a class must share a common data item. While, the visibility of this data item remains similar, the duration of this variable is for whole lifetime of the program.

For example, such a variable can be particularly useful if an object needs to know how many objects of its kind exist.

class counter

                 {

                  public :

                                                counter ();

                                                int getcount();

  private:

                                static int count;

                };

counter::counter ()

                 {

                count++;

                 }

 

int counter::getcount()

                {

                                return ( count );

                 }

 

     int counter :: count = 0;// INITIALIZATION OF STATIC MEMBER.

 

                void main()

                 {

                  counter c1,c2;

                                cout << " Count = " << c1.getcount() << endl;

                                cout << " Count = " << c2.getcount() << endl;

 

                  counter c3;

                                cout << " Count = " << c3.getcount() << endl;

                  counter c4,c5;

                                cout << " Count = " << c4.getcount() << endl;

                                cout << " Count = " << c5.getcount() << endl;

                  }

 

Output:

 

                Count = 2             // not 1 because 2 objects are already created.

                Count = 2

                Count = 3

                Count = 5

                Count = 5

 

 


Related Discussions:- Explain static class members

Define types of storage classes in c language, Define Types of storage clas...

Define Types of storage classes in C language? There are four storage classes in C language: 1. Automatic storage class. 2. External storage class. 3. Register storage cla

Area , Write a program to find the area under the curve y = f(x) between x ...

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.

Define structures in c++, Structures A structure is a user-defined data...

Structures A structure is a user-defined data type, which may have different data types as its members. Creating a structure is a two-part process. First, a structure template

Blackjack Game help, I can''t figure out how to stop the programming from h...

I can''t figure out how to stop the programming from hitting for the player even when they type in stand.

Padovan string, a padovan string p(n) for a natural number n is defined a...

a padovan string p(n) for a natural number n is defined as p(0)=''x'' p(1)=''y'' p(2)=''z'' p(n)=p(n-2)+p(n-3),n>2

LOOPS, HOW CAN WE EASLY LEARN C++

HOW CAN WE EASLY LEARN C++

Influence on Social media - for Geek''s, Recently social media has been flo...

Recently social media has been flooded by fb posts, tweets, news articles about only thing demonetization.A great debate is ongoing over it. Most of the people discussing in social

Ice_Cream Game, Do you have any solution on this activity?

Do you have any solution on this activity?

Blanche has a fashion design company called BLB_Best_Clothin, Blanche has a...

Blanche has a fashion design company called BLB_Best_Clothing Pty. That she has just opened recently

Areaundercurve.c, Write a program to find the area under the curve y = f(x)...

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. The area under a curve betw   Solution:

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