python//新手上路003//20191227

1 def area(r):#圆面积 PI=3.1415926 return PI*(r*r) r=((int)(input("输入圆的半径："))) print("%0.6f" % area(r)) 2 import random//随机数 print(random.randint(0,100)) 3 #猜数游戏 import random i = 1 a = random.ra

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