贴一下我写的程序...
import multiprocessing
import time
def calc(cpu_number, cpu_total, result, total):
sumlimit = 1000
for n in range(cpu_number, total, cpu_total):
s1 = 0
s2 = 0
sum = 0
for k in range(0, n):
s1 += (pow(16, n-k) % (k * 8 + 1)) / (k * 8 + 1)
for k in range(n+1, sumlimit):
s2 += (pow(16, n-k)) / (k * 8 + 1)
sum += (s1 + s2) * 4
s1 = 0
s2 = 0
for k in range(0, n):
s1 += (pow(16, n-k) % (k * 8 + 4)) / (k * 8 + 4)
for k in range(n+1, sumlimit):
s2 += (pow(16, n-k)) / (k * 8 + 4)
sum -= (s1 + s2) * 2
s1 = 0
s2 = 0
for k in range(0, n):
s1 += (pow(16, n-k) % (k * 8 + 5)) / (k * 8 + 5)
for k in range(n+1, sumlimit):
s2 += (pow(16, n-k)) / (k * 8 + 5)
sum -= (s1 + s2)
s1 = 0
s2 = 0
for k in range(0, n):
s1 += (pow(16, n-k) % (k * 8 + 6)) / (k * 8 + 6)
for k in range(n+1, sumlimit):
s2 += (pow(16, n-k)) / (k * 8 + 6)
sum -= (s1 + s2)
ret = (sum % 1) * 16
if ret < 0:
ret += 16
result[n] = int(ret)
def main():
print('Using CPU')
startt = time.time()
grid = 4
block = 1024
total = grid * block
cpu_n = multiprocessing.cpu_count()
cpu_result = multiprocessing.Array('d', total)
process = []
for i in range(0, cpu_n):
print('Starting CPU ' + str(i))
p = multiprocessing.Process(target=calc, args=(i, cpu_n, cpu_result, total))
process.append(p)
p.start()
for i in process:
i.join()
f = open('pi_bin_CPU.txt', 'w')
for i in range(0, total):
f.write((bin(int(cpu_result[i]))).replace('0b','').zfill(4) + ' ')
f.close()
final = 3.140625
for i in range(2, total):
try:
final = final + cpu_result[i] / pow(16, i+1)
except:
break
print(final)
print('Time elapsed:' + str(time.time() - startt))
if __name__ == "__main__":
main()自学了python一两天,程序写不好见谅