Static member

sumacangadi

int ObjectCounter::objectCount=0;

int main()

{

ObjectCounter obj1;

ObjectCounter obj2(42);

ObjectCounter obj3;

cout<<__func__<<":Begin"<<endl;

cout<<"number of object created in zero argument:"<<obj1.getObjectCount()<<endl;

cout<<"number of object created in one argument:"<<obj2.getObjectCount()<<endl;

cout<<"number of object created in zero argument:"<<obj3.getObjectCount()<<endl;

cout<<__func__<<":End"<<endl;

return 0;

}

//Below the code is classes.h

class ObjectCounter

{

private:

static int objectCount; //static variable to count the number of objects

int data;

public:

ObjectCounter(); //0 argument constructor

ObjectCounter(int);//One argument constructor

static int getObjectCount();

};

Hello,

When I run the above code I get the output like as below

number of object created in zero argument:3

number of object created in one argument:3

number of object created in zero argument:3

Can anyone please explain how it's working?

mohdmohsinkhanee

In the output, you observe that the count is 3 for all the three objects. This is because the static variable objectCount is shared among all instances of the class.

When an object is created, the constructor increments the value of the shared count. Since, obj1, obj2, and obj3 are created successively, thereby each time incrementing the value of the shared count. Consequently, the getObjectCount() function retrieves the current count, which reflects the cumulative number of objects created throughout the program's execution.

Static member

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