text: // File: main.cpp
  #include "apple_tree.hpp"
  #include <cstdlib>
  #include <iostream>
  
  int main(int argc, char* argv[]) {
    AppleTree tree("in the backyard");
    tree.shake();
    std::cout << "The tree is " << tree.location() << "." << std::endl;
    tree.shake_strongly();
  
    return EXIT_SUCCESS;
  }
  