import tkinter as tk
from tkinter import messagebox
from tkinter import *

app = tk.Tk()
app.title('圆的半径 面积 周长 知一求二程序')
app.geometry('425x125')

label1 = tk.Label(app, text="半径")
label2 = tk.Label(app, text="面积")
label3 = tk.Label(app, text="周长")

label1.grid(row=0)
label2.grid(row=1)
label3.grid(row=2)


entryx=Entry(app,font=("宋体",20))
entryy=Entry(app,font=("宋体",20))
entryz=Entry(app,font=("宋体",20))

entryx.grid(row=0,column=1)
entryy.grid(row=1,column=1)
entryz.grid(row=2,column=1)

import math
class ACricle(object):
    def __init__(self,r):
        self.r = r

    def get_area(self):
        return math.pi * math.pow(self.r, 2)

    def get_perimeter(self):
        return 2 * math.pi * self.r


class BCricle(object):
    def __init__(self,s):
        self.s = s

    def get_radius(self):
        return math.pow((self.s/math.pi),0.5)

    def get_2perimeter(self):
        return math.pow((self.s/math.pi),0.5)*2*math.pi

class CCricle(object):
    def __init__(self,p):
        self.p = p

    def get_2radius(self):
        return self.p/(2*math.pi)

    def get_2area(self):
        return math.pow((self.p/(2*math.pi)),2)*math.pi

def is_number(s):
    try:
        float(s)
        return True
    except ValueError:
        pass

    try:
        import unicodedata
        unicodedata.numeric(s)
        return True
    except (TypeError, ValueError):
        pass

    return False



def ok1():
    if is_number(entryx.get()):
        r = float(entryx.get())
        if r<=0 :
            messagebox.showinfo(title='提示信息', message=u'您的输入无效！')
        else:
            a = ACricle(r)
            messagebox.showinfo(title='面积与周长', message=f'圆面积:{a.get_area()}圆周长:{a.get_perimeter()}')
    else:
         messagebox.showinfo("提示", "您输入有误！")
    return
    app.destroy()
def ok2():
    if is_number(entryx.get()):
        s = float(entryy.get())
        if s<=0 :
            messagebox.showinfo(title='提示信息', message=u'您的输入无效！')
        else:
            b = BCricle(s)
            messagebox.showinfo(title='半径与周长', message=f'圆半径:{b.get_radius()}圆周长:{b.get_2perimeter()}')
    else:
         messagebox.showinfo("提示", "您输入有误！")
    return
    app.destroy()
def ok3():
    if is_number(entryx.get()):
        p = float(entryz.get())
        if p<=0 :
            messagebox.showinfo(title='提示信息', message=u'您的输入无效！')
        else:
            c = CCricle(p)
            messagebox.showinfo(title='半径与面积', message=f'圆半径:{c.get_2radius()}圆面积:{c.get_2area()}')
    else:
         messagebox.showinfo("提示", "您输入有误！")
    return
    app.destroy()

b1 = tk.Button(app,text='确定',width=10,command=ok1)
b1.grid(row=0,column=2)
b2 = tk.Button(app,text='确定',width=10,command=ok2)
b2.grid(row=1,column=2)
b3 = tk.Button(app,text='确定',width=10,command=ok3)
b3.grid(row=2,column=2)

app.mainloop()