transform

#include <algorithm>
#include <vector>
#include <iostream>

int
main(int argc, char* argv[])
{
  using namespace std;

	vector<double> v1 = {1.1,2.2,3.3};
	vector<int> v2(v1.size());

	transform(
		v1.begin(), v1.end(), v2.begin(),
		[](decltype(v1)::value_type a) -> decltype(v2)::value_type { return a; });

	for(auto i : v2)
	{
		cout << i << endl;
	}

	return 0;
}