Example of working with tuples to return multiple values; Example of using tuples in place of structs

tuples.cpp

  #include <tuple>
  #include <iostream>

  using std::tuple;
  using std::tie;
  using std::make_tuple;
  using std::cout;

  class rectangle
  {
    int width, height;
    public:
    rectangle(int _width, int _height) : width(_width), height(_height) {}
    
    //tuple acts as a return type for this function, just as any single-unit return type would.
    //make_tuple() provides a means of returning the expected tuple.
    tuple<int, int> get_dimensions() {return make_tuple(width, height);}
  };

  int main()
  {
      rectangle r(3,4);
      int w,h;
      
      //binds the tuple's values to w and h simultaneously with tie()
      tie(w,h) = r.get_dimensions();
      cout << w << ' ' << h << '\n';
      return 0;
  }

Example lifted from http://blog.paphus.com/blog/2012/07/25/tuple-and-tie/