#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <complex>

int main()
{   
  typedef std::complex<double> cmplx ;
  std::vector<cmplx> v={cmplx(11,12),cmplx(22,21),cmplx(33,32)};
  for(auto x:v) std::cout<<x<<" ";
  std::cout<<" original data"<<"\n";
  // take complex conjugate of elements
  std::for_each(v.begin(),v.end(), [](cmplx& c) {c = conj(c);});
  for(auto x:v) std::cout<<x<<" ";
  std::cout<<" complex conjugate"<<"\n";
}