#include <algorithm>
#include <iostream>
#include <vector>
#include <iterator>
#include <ctype.h>

char to_lower( char c) {
  return (char)::tolower( c);
}

class Sum {
  int _sum;

public:

  Sum( int sm=0) : _sum(sm) {}

  int operator()( int lhs) {
    _sum += lhs;
    return _sum;
  }
};

using namespace std;

int main() {
  string foo( "AbcdEfgHIJklmn");
  string bar( foo.size(), ' ');

  transform( foo.begin(), foo.end(), bar.begin(), to_lower);
  cout <<  foo << endl;
  cout <<  bar << endl;

  vector<int> v( 10, 1), integral_v( 10), double_integral_v( 10);

  transform( v.begin(), v.end(), integral_v.begin(), Sum( 0));
  transform( integral_v.begin(), integral_v.end(), double_integral_v.begin(), Sum( 0));

  copy( integral_v.begin(), integral_v.end(), ostream_iterator<int>( cout, " "));
  cout << endl << endl;
  copy( double_integral_v.begin(), double_integral_v.end(), ostream_iterator<int>( cout, " "));


  return 0;
}