C++ Tutorial/STL Algorithms Helper/slice

#include <iostream>
#include <valarray>
#include <cmath>
using namespace std;
int main()
{
  valarray<int> v(10);
  for(int i=0; i<10; i++)
      v[i] = i;
  cout << "Original contents: ";
  for(int i=0; i<10; i++)
    cout << v[i] << " \n\n";
  valarray<int> result = v[slice(0,5,2)];
  cout << "Contents of result: ";
  for(int i=0; i<result.size(); i++)
    cout << result[i] << " ";

  cout << endl;
}