high = 100

n = 10

high_all = 0 #第n次落地時走過的長度

high_each = 0 #每次落地的高度

def ball_lands(n):

global high_all, high_each, high

#小球第一次落地時

if n == 0:

high_each = high

high_all += high_each

#print("1", high_each, high_all)

return high_each

#從小球第n次落地往前推

high_each = high * (1 / 2) ** n

print(u"第%d次小球彈起的高度為：%.2f" %(n, high_each))

high_all += high_each * 2

#print("2", high_each, high_all)

ball_lands(n - 1)

ball_lands(n)

print(u"小球落地%d次，共經過%.2f米。" % (n,high_all))