School Commit Init

Anul 1/Semestrul 1/Fundamentals of Programming/FP/src/lecture/examples/ex38_inheritance.py

@@ -0,0 +1,128 @@
+"""
+Created on Nov 23, 2016
+
+@author: Arthur
+"""
+
+
+class Shape:
+    def __init__(self, color):
+        # print("building a shape")
+        self._color = color
+
+    @property
+    def color(self):
+        return self._color
+
+    @color.setter
+    def color(self, new_color):
+        self._color = new_color
+
+    @property
+    def area(self):
+        return 0
+
+    def __str__(self):
+        return "a " + self.color + " shape"
+
+
+class Rectangle(Shape):
+    def __init__(self, width, height, color):
+        Shape.__init__(self, color)
+        # print("building a rectangle")
+        self._width = width
+        self._height = height
+
+    @property
+    def width(self):
+        return self._width
+
+    @property
+    def height(self):
+        return self._height
+
+    @property
+    def area(self):
+        return self._width * self._height
+
+    def __str__(self):
+        return "a " + self.color + " rectangle"
+
+
+class Square(Rectangle):
+    def __init__(self, side, color):
+        # print("building a square")
+        Rectangle.__init__(self, side, side, color)
+
+    @property
+    def side(self):
+        return self._width
+
+    def __str__(self):
+        return "a " + self.color + " square"
+
+
+class Ellipse(Shape):
+    def __init__(self, major, minor, color):
+        Shape.__init__(self, color)
+        # print("building an ellipse")
+        self._major = major
+        self._minor = minor
+
+    @property
+    def major(self):
+        return self._major
+
+    @property
+    def minor(self):
+        return self._minor
+
+    @property
+    def area(self):
+        return 3.14 * self._minor * self._major
+
+    def __str__(self):
+        return "a " + self.color + " ellipse"
+
+
+class Circle(Ellipse):
+    def __init__(self, radius, color):
+        Ellipse.__init__(self, radius, radius, color)
+        # print("building a circle")
+
+    @property
+    def radius(self):
+        return self.major
+
+    @property
+    def area(self):
+        return 3.14 * self.radius ** 2
+
+    def __str__(self):
+        return "a " + self.color + " circle"
+
+
+if __name__ == "__main__":
+    shape = Shape("red")
+    print(str(shape) + ", area is = " + str(shape.area))
+
+    """
+        The rectangle 'is a' shape
+    """
+    rectangle = Rectangle(5, 2, "blue")
+    print(str(rectangle) + ", area is = " + str(rectangle.area))
+
+    """
+        The square 'is a' particular rectangle
+    """
+    square = Square(3, "green")
+    print(str(square) + ", area is =" + str(square.area))
+
+    ellipse = Ellipse(10, 6, "pink")
+    print(str(ellipse) + ", area is =" + str(ellipse.area))
+
+    """
+        The circle 'is a' particular ellipse
+    """
+    circle = Circle(8, "magenta")
+    print(str(circle) + ", area is =" + str(circle.area))