计算pi的位数

from random import random
from math import sqrt
from time import clock
DARTS=1000000
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*(hits/DARTS)
print("pi值是{}.".format(pi))
print("运行的时间是:{:.5f}s".format (clock()))

#include<stdio.h>
void main()
{
double pi=0.0,i=1.0,j=1.0;
for(;i<1000000;i+=2,j=-j)
pi+=1/(i*j);
pi=pi*4;
printf("pi=%lf",pi);
}