#include <iostream>

using namespace std;

class clsMesinKira{
	private:
		int a,b;
	public:
		void setData(int p, int q){
			a=p;
			b=q;
		}

		void doCampur(void){
			cout<<a+b<<endl;
		}

		void doTolak(void){
			cout<<a-b<<endl; //andaikan nilai pertama tolak nilai kedua
		}
};



int main() {
	clsMesinKira objMesinKira;
	objMesinKira.setData(1,2);	
	objMesinKira.doCampur();
	objMesinKira.doTolak();
	return 0;
}