计算pi的其他方法

方法一：

HPI = 1
for i in range(1,10000):
	HPI *= (4*i*i)/(2*i-1)/(2*i+1)
	PI = 2*HPI
	print(PI,end = '\r',flush=True)

方法二：

import math
SPIS = 0
for i in range(1,10000000):
	SPIS += 1/(i*i)
	PI = math.sqrt(SPIS*6)
	print(PI,end = '\r',flush=True)