#include <iostream>
using namespace std;

class all{
	int x,y;
public:
	all(int a,int b):x(a),y(b){};
	~all(){};
	int add(){return (x+y);};
	int sub(){return (x-y);};
	int mul(){return (x*y);};
	int div(){return (x/y);};

};

int main()
{
	all a(4,2);
	cout<<"add="<<a.add()<<endl;
	cout<<"sub="<<a.sub()<<endl;
	cout<<"mul="<<a.mul()<<endl;
	cout<<"div="<<a.div()<<endl;
}