Static variables....

STATIC VARIABLES

Static variables are very crucial in cpp language and also for building logics for a company. Today, we will see a code first and then we will discuss the static variables.

#include<iostream>

#include<string>

using namespace std;

class people

{

       string address;//privately called//

       string name;//privately called//

public:

       static int id;// prototype of declaring a static variable//

       people(string name, string address)//Parameterized constructor which sets the //value for name and address//

       {

             ++id;// increment of that static variable as a new person comes to join..//

             this->name = name;//set the value for name//

             this->address = address;// set the value for address//

       }

       void show()//this will show the full identity(name, address, id) of that person//

       {

             cout << "ID : " << id << endl;

             cout << "Name : " << name << endl;

             cout << "Address : " << address << endl;

       }

};

int people::id = 0;(initialize the static member)

int main()

{

       people p("Fahim", "Bangladesh");(first person)

       p.show();//(shows identity of first person) //

       people p1("Preety", "Bangladesh");//(second person)

       p1.show();//(shows identity of second person)//

       people p2("Umar Faruque Imran", "Bangladesh");//(third person)//    

p2.show()//(shows identity of third person)//
people p3("Chisty", "Bangladesh");//(forth person)//
p3.show();//(shows identity of forth person)//

       return 0;

}

Actually, the code is counting the number of people joining a company. The company store the people by his or her name, country and id. Id is such kind of variable which increases one when a new one enters that company. Like: when one new person comes to join then his id will be 1. Then if other person come to join. Then his or her id will be 2. Then 3….4..5.

Mechanism:-  When we declare a static member, it means that member has the accessibility of the whole program. It can be increased from any class and from anywhere. But one thing we have to consider. That is, we have to declare the static variable publicly.  When an object is created of that class, then the constructor is called. As the constructor is called, the static variable has a pre-increment. Then when we call void show(). This print the  full identity of that person…

Happy Coding……😊😊