lambda in C++11

lambdacpp11.cpp

#include <iostream>
#include <numeric>
#include <vector>

using namespace std;

int main()
{
  vector<int> array = {1, 2, 3, 4, 5};

  int r = accumulate(array.begin(), array.end(), 0, 
       [](const int& x, const int& y) -> int  { return x + y*2; });

  cout << r << endl;

  return 0;
}