《python语言程序设计》2018版第7章第05题几何：正n边形，一个正n边形的边都有同样的长度。角度同样 设计RegularPolygon类

结果和代码 这里只涉及一个办法

方法部分

def main():rX, rY = eval(input("Enter regular polygon x and y axis:"))regular_num = eval(input("Enter regular number: "))side_long = eval(input("Enter side number: "))a = exCode07.RegularPolygon(regular_num, side_long,rX, rY)print(f"x: {rX} y: {rY} regular polygon  area is {a.getArea()} and perimeter{a.getPerimeter()}")main()

类部分

class RegularPolygon:def __init__(self, n, side, x, y):此处没写默认值def __init__(self, n=3, side=1, x=0, y=0): 此处有默认值，别两个一起弄。哈哈哈self.n = nself.side = sideself.x = xself.y = ydef get_x(self):return self.xdef set_x(self, x):self.x = xdef get_y(self):return self.ydef set_y(self, y):self.y = ydef get_n(self):return self.ndef set_n(self, n):self.n = ndef get_side(self):return self.sidedef set_side(self, y):self.y = ydef getArea(self):area_num1 = self.n * pow(self.side, 2)**注意这里别用// area_num2 = 4 * math.tan(math.pi / self.n)area_total = area_num1 / area_num2return area_totaldef getPerimeter(self):

按书上要求的写三个对象

def main_2():a = exCode07.RegularPolygon()b = exCode07.RegularPolygon(6, 4)c = exCode07.RegularPolygon(10, 4, 5.6, 7.8)print(f"x: {a.x} y: {a.y} regular polygon  area is {a.getArea()} and perimeter{a.getPerimeter()}")print(f"x: {b.x} y: {b.y} regular polygon  area is {b.getArea()} and perimeter{b.getPerimeter()}")print(f"x: {c.x} y: {c.y} regular polygon  area is {c.getArea()} and perimeter{c.getPerimeter()}")