《PYTHON语言程序设计》(2018版)1.20修改这道题，利用类的方式(二) 接近成功....(上)

在类的外面建立4个顶点

turtle.speed(20)

ran1_x1 = random.randint(-69, -60)
ran1_y1 = random.randint(-5, 10)
ran1_x2 = random.randint(-69, -60)
ran1_y2 = random.randint(75, 80)
ran1_x3 = random.randint(79, 90)
ran1_y3 = random.randint(70, 85)
ran1_x4 = random.randint(70, 95)
ran1_y4 = random.randint(0, 20)

类的内部

class draw_rec:
    def __init__(self, r1x1, r1y1, r1x2, r1y2, r1x3, r1y3, r1x4, r1y4, add):
        self.__r1x1 = r1x1
        self.__r1y1 = r1y1
        self.__r1x2 = r1x2
        self.__r1y2 = r1y2
        self.__r1x3 = r1x3
        self.__r1y3 = r1y3
        self.__r1x4 = r1x4
        self.__r1y4 = r1y4

        self.__add = add

    def get_r1x1(self):