Memory copy of pointers in c++

memcpy_simple.cpp

#include <iostream>
#include <cstring> //memcpy implemented here

// Copy pointer y from x
void copy_pointer(double *y, const double *x, size_t n){
  // The size in memcpy is byte length!
  std::memcpy(y, x, n * sizeof(double));
}

int main() {
  double y[5];
  double x[5] = {1.0, 2.0, 3.0, 4.0, 5.0};
  copy_pointer(y, x, 5);
  for (size_t i=0; i<5; ++i)
    std::cout << x[i] << " "
              << y[i] << " " << std::endl;
    // std::cout << std::endl;
              return 0;
  
}