#include<iostream>
#include<conio.h>

using namespace std;

class cos
{
    int a, b;
    public:
        cos(int l1=0, int l2=0):a(l1),b(l2){}
        //cos(cos & kopia){a=kopia.a; b=kopia.b;    }
        friend ostream & operator << (ostream &, cos &);
        cos & operator ++() {a++; b++; return *this;    }
        friend cos operator +(const cos &, const cos &);
};

cos l1(3,4);
cos l2(4,5);
cos l3;

int main()
{
    //l2.wypisz();
    cout<<l2;
    ++l2;
    cout<<l2;
    l3=l1+l2;
    cout<<l3;
    getch();
    return 0;
}

cos operator +(const cos & l1, const cos & l2)
{
    return cos(l1.a + l2.a, l1.b+l2.b);
}

ostream & operator <<(ostream & ekran, cos & l)
{
    ekran<<l.a<<" "<<l.b<<endl;
    return ekran;
}