empty string c++ value

// string::empty
#include <iostream>
#include <string>

int main ()
{
  std::string content;
  std::string line;
  std::cout << "Please introduce a text. Enter an empty line to finish:\n";
  do {
    getline(std::cin,line);
    content += line + '\n';
  } while (!line.empty());
  std::cout << "The text you introduced was:\n" << content;
  return 0;