使用 Class 和继承计算三角形的面积

Question

大家好，我正在尝试使用 Heron 公式计算三角形的面积，即 area= sqrt(s(s-l1)(s-l2)(s-l3)) 。为此，我需要检查给定的边是否与我拥有的三角形相加。

但是，我在这里无法弄清楚如何在继承的 class 中使用它。

什么，我想做的是从父 class 获取输入并从继承的 class 计算面积。任何帮助表示赞赏。

使用的术语 1) l1, l2, l3 : 三角形的边 2) Checktri 方法用于检查给定的边加起来是否为三角形 3）Areatri是Triangledim的继承class，其中需要求出面积

import math
class Triangledim:
    def __init__(self, l1, l2, l3):
        self.l1 = l1
        self.l2 = l2
        self.l3 = l3

#Check if the given measurements form a triangle
    def checktri(self):
        if (self.l1+self.l2>self.l3) & (self.l2+self.l3>self.l1) & (self.l1+self.l3>self.l2):
            s = (self.l1 +self.l2+self.l3)/2
            return ("Perimeter of the triangle is %f" %s)
        else : 
            return("not the right triangle proportions") 

class Areatri(Triangledim):
      def __init__(self):
            Triangledim.__init__(self)
            area = math.sqrt(self.s(self.s-self.l1)(self.s-self.l2)(self.s-self.l3))
            return area


p=Triangledim(7,5,10)

Answer 1

您可能需要以下代码：

import math

class Triangledim():

    def __init__(self, l1, l2, l3):
        self.l1 = l1
        self.l2 = l2
        self.l3 = l3
        self.s = (self.l1+self.l2+self.l3) / 2.0

    def checktri(self):
        if (self.l1+self.l2>self.l3) and (self.l2+self.l3>self.l1) and (self.l1+self.l3>self.l2): 
            print("Perimeter of the triangle is: {}".format(self.s))
        else: 
            print("not the right triangle proportions") 

    def findArea(self):
        area = math.sqrt(self.s*(self.s-self.l1)*(self.s-self.l2)*(self.s-self.l3))
        print("The area of the triangle is: {}".format(area))

if __name__ == "__main__":
    p = Triangledim(7,5,10)
    p.checktri()
    p.findArea()

输出：

Perimeter of the triangle is: 11.0
The area of the triangle is: 16.24807680927192

如果您想使用遗产，以下内容将为您完成工作：

import math

class Triangledim():

    def __init__(self, l1, l2, l3):
        self.l1 = l1
        self.l2 = l2
        self.l3 = l3
        self.s = (self.l1+self.l2+self.l3) / 2.0

    def checktri(self):
        if (self.l1+self.l2>self.l3) and (self.l2+self.l3>self.l1) and (self.l1+self.l3>self.l2): 
            print("Perimeter of the triangle is: {}".format(self.s))
        else: 
            print("not the right triangle proportions") 

class Areatri(Triangledim):
    def findArea(self):
        area = math.sqrt(self.s*(self.s-self.l1)*(self.s-self.l2)*(self.s-self.l3))
        print("The area of the triangle is: {}".format(area))

if __name__ == "__main__":
    p = Areatri(7,5,10)
    p.checktri()
    p.findArea()

输出：

Perimeter of the triangle is: 11.0
The area of the triangle is: 16.24807680927192

使用 Class 和继承计算三角形的面积

Calculate the area of the Triangle using Class and Inheritance

python

class

inheritance

area