#include <string>
#include <iostream>
#include <memory>

struct Foo {
  char foo[3] = {'f','o','o'};
  char e = 42;
  char n = 42;
  char d = 0;
};

int main() {
  auto f = std::make_unique<Foo>();


  std::string s{f->foo, 3};

  std::cout << s << std::endl;
  std::cout << f->foo << std::endl;

}