研究死锁时的经典案例，哲学家进餐，这里有五个不同的实现（因为在对这个问题的研究过程中前人提出了很多的思路），这里实现了最经典常见的五种-The Case Study of deadlock, the Dining Philosophers, here are five different implementations (as in the study of this issue in the previous made a lot of ideas), where realization of