#include <iostream>

class Test1 {
public:
    Test1(char Zeichen, int Zahl) : _zeichen(Zeichen), _zahl(Zahl)
    {
    }

    void print_me()
    {
        for (int i = 0; i < _zahl; ++i)
            std::cout << _zeichen;
        std::cout << "\n";
    }
private:
    char _zeichen;
    int _zahl;
};


class Test2
{
public:
    Test2(Test1& t1, Test1& t2) : _t1(t1), _t2(t2)
    {
    }

    void do_it()
    {
        std::cout << "t1: ";
        _t1.print_me();
        std::cout << "t2: ";
        _t2.print_me();
    }
    
private:
    Test1& _t1;
    Test1& _t2;
};
  
  
int main(void)  
{
    Test1 z1('a', 2);
    Test1 z2('b', 4);
    Test2 foo(z1, z2);
    foo.do_it();
}