数据结构（Python语言描述）Kenneth A. Lambert 第一版 习题答案参考1.1

#计算球体的直径、圆周长、表面积和体积
import math

r = float(input("Enter the sphere's radius:"))

d = 2 * r
l = 2 * math.pi * r
s = 4 * math.pi * r * r
v = 4/3.0 * math.pi * r * r * r

print("Diameter     :", d)
print("Circumference:", l)
print("Surface area :", s)
print("Volume       :", v)