Python入门习题5.蒙特卡罗方法计算圆周率

 

#CalPi.py
from random import random
from math import sqrt
from time import clock
DARTS = 10000000
hits = 0.0
clock()
for i in range(1, DARTS+1):
    x, y = random(), random()
    dist = sqrt(x ** 2 + y ** 2)
    if dist <= 1.0:
        hits = hits + 1
pi = 4.0 * (hits/DARTS)
print("pi值是{}".format(pi))
print("运行时间是：{:5.5}s".format(clock()))