/*
Exercise 4.3.1:
Fill two containers with the same number of integer values.
Create a new container, whose elements are the sum of the appropriate
elements in the original container.
Hint: The library provides an
algorithm and a function object to do the exercise.
*/
#include <vector>
#include <functional>
#include <deque>
#include <algorithm>
#include <iterator>

using namespace std;

 // Value generator simply doubles the current value
 // and returns it
 template <class T>
 class generate_val
 {
   private:
      T val_;
   public:
      generate_val(const T& val) : val_(val) {}
      T& operator()() { val_ += val_; return val_; }

 };

typedef  ostream_iterator<int> IntOsIt;

void main()
{
   generate_val<int> gen(1);
	vector<int> v1(10),v2(10),v3(10);

   generate(v1.begin(), v1.end(), gen);
   v2=v1;
   transform(v1.begin(), v1.end(),
   			v2.begin(),
            	v3.begin(),plus<int>() );

 	IntOsIt os(cout," ");
 	copy(v3.begin(), v3.end(), os);

   cout<<"\nPress any key to exit...";
   while(!cin.get())
   ;
};