分别用两个线程代表两个用户从同一个账户取钱,账户总额10000元,每个用户每次取1000元,余额不足时,就不能取款,也不能出现超取现象。每次取钱输出用户名称、和剩余金额
时间: 2023-06-24 07:04:26 浏览: 145
以下是基于Python的代码实现:
```python
import threading
# 定义账户总额和每次取款金额
total_money = 10000
withdraw_money = 1000
# 定义一个锁对象,用于保证线程安全
lock = threading.Lock()
# 定义两个用户类
class UserA(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self):
global total_money
while True:
# 获取锁对象
lock.acquire()
if total_money >= withdraw_money:
total_money -= withdraw_money
print("User A withdraws 1000 yuan, remaining balance:", total_money)
else:
print("User A fails to withdraw, remaining balance:", total_money)
# 释放锁对象
lock.release()
# 模拟网络延迟
self.sleep(1)
class UserB(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self):
global total_money
while True:
# 获取锁对象
lock.acquire()
if total_money >= withdraw_money:
total_money -= withdraw_money
print("User B withdraws 1000 yuan, remaining balance:", total_money)
else:
print("User B fails to withdraw, remaining balance:", total_money)
# 释放锁对象
lock.release()
# 模拟网络延迟
self.sleep(1)
if __name__ == '__main__':
# 创建两个用户对象并启动线程
user_a = UserA()
user_b = UserB()
user_a.start()
user_b.start()
```
在上述代码中,我们使用了Python的`threading`库来实现多线程,并定义了一个`lock`锁对象来保证线程安全。`UserA`和`UserB`分别代表两个用户,并且在`run`方法中实现了每次取款1000元的逻辑,如果账户余额不足则无法取款。最后在主函数中创建两个用户对象并启动线程。
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