A small modern C++ example converting a std::string to a c-style string (character array).

convert_stdstring_to_char_array.cpp

#include <iostream>
#include <string>

void print_to_screen(const char* char_array) { std::cout << char_array << '\n'; }

int main() {
  std::string std_str{"Hello, World!\n"};
  const char* char_array{std_str.c_str()};

  print_to_screen(char_array);
}