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# 圆周率计算 蒙特卡洛
import random
import time
darts = 1000*1000  # 影响运行时间
hits = 0.0
start = time.perf_counter()  # 程序的花费时间大都在循环语句上
for i in range(1, darts+1):
    x, y = random.random(), random.random()
    dist = pow(x ** 2 + y ** 2, 0.5)
    if dist <= 1.0:
        hits = hits + 1
pi = 4 * (hits/darts)
print("圆周率的值：{}".format(pi))
print("运行时间是：{:.5f}s".format(time.perf_counter()-start))