使用 Python 代码实现多线程求合数的个数。
时间: 2024-03-30 12:13:34 浏览: 100
你好,针对您的问题,以下是 Python 代码实现多线程求合数的个数的示例:
```python
import threading
# 判断一个数是否为合数
def is_composite(n):
if n < 2:
return False
for i in range(2, int(n ** 0.5) + 1):
if n % i == 0:
return True
return False
# 多线程求合数的个数
def count_composite_numbers(start, end, count):
for i in range(start, end):
if is_composite(i):
count += 1
return count
if __name__ == '__main__':
num_threads = 4
num_range = 1000000
count = 0
threads = []
# 创建多个线程
for i in range(num_threads):
start = int(i * num_range / num_threads)
end = int((i + 1) * num_range / num_threads)
thread = threading.Thread(target=count_composite_numbers, args=(start, end, count))
threads.append(thread)
# 启动所有线程
for thread in threads:
thread.start()
# 等待所有线程执行完毕
for thread in threads:
thread.join()
print("合数的个数为:", count)
```
希望对您有所帮助!如果您有更多问题,欢迎继续提问。
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