/*
 * function-objects-03.cc    Standard Library, Funtion objects and Lambda expression, exercise 3.
 */
#include <algorithm>
#include <functional>
#include <iostream>
#include <iterator>
#include <string>
#include <vector>
using namespace std;
using namespace std::placeholders;

template<typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
   copy(begin(v), end(v), ostream_iterator<T>(os, " "));
   return os;
}

int main()
{
   vector<int> v{ 5, 4, 12, 8, 2, 1, 3, 10, 9, 7, 6, 11 };
   cout << "\nValues in the vector:\n" << v << "\n\n";

   ostream_iterator<int> out(cout, " ");

   // a)
   cout << "Values in the vector greater than 5:\n";
   copy_if(begin(v), end(v), out, [](int x){ return x > 5; });
   cout << "\n\n";
   // b)
   cout << "Values in the vector not equal to 10:\n";
   copy_if(begin(v), end(v), out, [](int x){ return x != 10; });
   cout << "\n\n";
   // c)
   cout << "Multiply each value in the vector by 2:\n";
   transform(begin(v), end(v), begin(v), [](int x){ return x*2;});
   cout << v << "\n\n";

   return 0;
}