// using objects inside classes
// Mikhail Nesterenko
// 3/17/2016

#include <iostream>
#include <string>

using std::cout; using std::endl; using std::string;

// example class
class Example{
public:
   Example(int a, string b): a_(a), b_(b) {} // constructor with initializer list
   void print() const;
private:
   int a_;
   string b_;
};

void Example::print() const{
   cout << a_ << ' ' << b_ << endl;
}

// second example class whose member is an object
class CompExample{
public:
   CompExample(int x, int a, string b): x_(x), y_(a, b){} // calling Example constructor
   CompExample(): x_(0), y_(0, ""){} // void construtor
   void print() const;
private:
  int x_;
  Example y_;
};

void CompExample::print() const{
   cout << x_ << endl;
   y_.print(); // invoking member function on y_
}

int main(){
   CompExample ob1(1, 2, "three");
   CompExample ob2;

   ob2 = ob1; // copying object sate

   ob2.print(); // printing object state
}