源码:
import math
class banjing():
def ban(self):
r=float(input("输入半径:"))
area=math.pi*r*r
per=2*math.pi*r
print("面积=%.2f"%area)
print("周长=%.2f"%per)
class mianji():
def mian(self):
a = float(input("输入面积:"))
r = math.sqrt(a/math.pi)
per = 2*math.pi*r
print("半径=%.2f"%r)
print("周长=%.2f"%per)
class zhouchang():
def zhou(self):
p = float(input("输入周长:"))
r = p/(2*math.pi)
a = math.pi*r*r
print("半径=%.2f"%r)
print("面积=%.2f"%a)
class jisuan(banjing,mianji,zhouchang):
pass
A = jisuan()
A.ban()
A.mian()
A.zhou()
很简单的类的使用,答案拿去,留下你的赞~