// Ex7_01.CPP
  // Exercising structures in the yard
  include <iostream>
  using std::cout;
  using std::endl;
  
  // Definition of a struct to represent rectangles
  struct RECTANGLE
  {
    int Left;                            // Top left point
    int Top;                             // coordinate pair
  
    int Right;                           // Bottom right point
    int Bottom;                          // coordinate pair
  };
  
  // Prototype of function to calculate the area of a rectangle
  long Area(RECTANGLE& aRect);
  
  // Prototype of a function to move a rectangle
  void MoveRect(RECTANGLE& aRect, int x, int y);
  
  int main(void)
  {
    RECTANGLE Yard = { 0, 0, 100, 120 };
    RECTANGLE Pool = { 30, 40, 70, 80 };
    RECTANGLE Hut1, Hut2;
  
    Hut1.Left = 70;
    Hut1.Top = 10;
    Hut1.Right = Hut1.Left + 25;
    Hut1.Bottom = 30;
  
    Hut2 = Hut1;                         // Define Hut2 the same as Hut1
    MoveRect(Hut2, 10, 90);              // Now move it to the right position
  
    cout << endl
         << "Coordinates of Hut2 are "
         << Hut2.Left << "," << Hut2.Top << " and "
         << Hut2.Right << "," << Hut2.Bottom;
  
    cout << endl
         << "The area of the yard is "
         << Area(Yard);
  
    cout << endl
         << "The area of the pool is "
         << Area(Pool)
         << endl;
  
    return 0;
  }
  
  // Function to calculate the area of a rectangle
  long Area(RECTANGLE& aRect)
  {
    return (aRect.Right - aRect.Left)*(aRect.Bottom - aRect.Top);
  }
  
  // Function to Move a Rectangle
  void MoveRect(RECTANGLE& aRect, int x, int y)
  {
    int length = aRect.Right - aRect.Left;    // Get length of rectangle
    int width = aRect.Bottom - aRect.Top;     // Get width of rectangle
  
    aRect.Left = x;                           // Set top left point
    aRect.Top = y;                            // to new position
    aRect.Right = x + length;                 // Get bottom right point as
    aRect.Bottom = y + width;                 // increment from new position
  
    return;
  }