CPP 053 – Static Members

// main.cpp
#include <iostream>
using namespace std;

class Player { 
	string name; 
	int health; 
	int ID;
	static int globalID;

public:
	Player(string name, int health) : name{ name }, health{ health } {
		ID = globalID++;
	}
	int getID() { return ID; }

	static int getGlobalID() { return globalID; }
};
int Player::globalID = 0;

int main() {
	cout << "Player::globalID : " << Player::getGlobalID() << endl; 
	// Player::globalID : 0

	Player p1("ahmet", 100);
	Player p2("mehmet", 100);
	Player p3("selim", 100);

	cout << "p2 ID: " << p2.getID() << endl; // p2 ID : 1
	cout << "p3 ID: " << p3.getID() << endl; // p3 ID : 2
	cout << "p1 ID: " << p1.getID() << endl; // p1 ID : 0

	cout << "Player::globalID : " << Player::getGlobalID() << endl;
	// Player::globalID : 3

}