static class in c 2b 2b

1#include <iostream>
2
3class Entity {
4public:
5	static int  x,y;
6	static void Print() {
7		std::cout << x << ", " << y << std::endl;
8	}// sta1tic methods can't access class non-static members
9};
10int Entity:: x;
11int Entity:: y;// variable x and y are just in a name space and we declared them here
12int main() {
13	Entity e;
14	Entity e1;
15	e.x = 5;
16	e.y = 6;
17	e1.x = 10;
18	e1.y = 10;
19	e.Print();//output => 10 because variable x and y being static point to same block of memory
20	e1.Print();//output => 10 because variable x and y being static point to same block of memory
21	Entity::x;	//you can also acess static variables and functions like this without creating an instance
22    Entity::Print();	//you can also acess static variables and functions like this without creating an instance
23	std::cin.get();
24}

1#include <iostream>
2 
3using namespace std;
4
5class Box {
6   public:
7      static int objectCount;
8      
9      // Constructor definition
10      Box(double l = 2.0, double b = 2.0, double h = 2.0) {
11         cout <<"Constructor called." << endl;
12         length = l;
13         breadth = b;
14         height = h;
15
16         // Increase every time object is created
17         objectCount++;
18      }
19      double Volume() {
20         return length * breadth * height;
21      }
22      static int getCount() {
23         return objectCount;
24      }
25      
26   private:
27      double length;     // Length of a box
28      double breadth;    // Breadth of a box
29      double height;     // Height of a box
30};
31
32// Initialize static member of class Box
33int Box::objectCount = 0;
34
35int main(void) {
36   // Print total number of objects before creating object.
37   cout << "Inital Stage Count: " << Box::getCount() << endl;
38
39   Box Box1(3.3, 1.2, 1.5);    // Declare box1
40   Box Box2(8.5, 6.0, 2.0);    // Declare box2
41
42   // Print total number of objects after creating object.
43   cout << "Final Stage Count: " << Box::getCount() << endl;
44
45   return 0;
46}

1#include <iostream>
2 
3using namespace std;
4
5class Box {
6   public:
7      static int objectCount;
8      
9      // Constructor definition
10      Box(double l = 2.0, double b = 2.0, double h = 2.0) {
11         cout <<"Constructor called." << endl;
12         length = l;
13         breadth = b;
14         height = h;
15         
16         // Increase every time object is created
17         objectCount++;
18      }
19      double Volume() {
20         return length * breadth * height;
21      }
22      
23   private:
24      double length;     // Length of a box
25      double breadth;    // Breadth of a box
26      double height;     // Height of a box
27};
28
29// Initialize static member of class Box
30int Box::objectCount = 0;
31
32int main(void) {
33   Box Box1(3.3, 1.2, 1.5);    // Declare box1
34   Box Box2(8.5, 6.0, 2.0);    // Declare box2
35
36   // Print total number of objects.
37   cout << "Total objects: " << Box::objectCount << endl;
38
39   return 0;
40}