题解 | #球的表面积#
球的表面积
https://www.nowcoder.com/practice/7a5e2f1ed2594e38bad804323a775c93
import math class Circle(object): def __init__(self,r) -> None: self.r=r def Mji(self): return 4*math.pi*(self.r**2) l=[1, 2, 4, 9, 10, 13] for i in l: print(round(Circle(i).Mji(),2))