第三次作业-有进度条圆周率计算

import time
from random import random
scale = 10 
print("执行开始".center(scale//2, "-")) 
start=time.perf_counter()
DARTS=1000*1000
hits=0.0
for i in range(1,DARTS):
    x,y=random(),random()
    dist=pow(x**2+y**2,0.5)
    if dist<=1.0:
        hits=hits+1
pi=4*(hits/DARTS)
for i in range(scale+1):     
    a = '*' * i     
    b = '.' * (scale - i)     
    c = (i/scale)*100     
    dur = time.perf_counter() - start     
    print("{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,dur))     
    time.sleep(0.1)
print("圆周率值是:{}".format(pi))
print("\n"+"执行结束".center(scale//2,'-'))