//************************************************
//flessibilita' overloading operatori con funzione
//friend
//************************************************

#include <iostream>
using namespace std;

class custom{
	int number;
public:
	custom(){number=0;}
	custom(int num){number=num;}
	void show(){
		cout<<"Il numero di utenti e'..."<<number<<endl;
	}
	friend custom operator+(custom ob1, int val){
		ob1.number=ob1.number+val;
		return ob1;
	}
	friend custom operator+(int val, custom ob1){
		ob1.number=val+ob1.number;
		return ob1;
	}
};

//==========================================================
int main(){
	custom ob1,ob2(3);
	int val=4;
	ob1.show();
	ob2.show();
	ob1=ob1+val;
	ob2=val+ob2;
	ob1.show();
	ob2.show();
	return 0;
}