一个模拟沃尔玛柜台结账的排队论仿真，相当于一个M/M/C系统，用event driven思路写成。-Wal-Mart checkout counter in a simulated the queuing theory simulation, which is equivalent to an M/M/C system, written by event driven ideas.

实现了排队论中M/M/1模型的模拟及仿真。-Achieved in the M/M/1 queuing theory model for simulation and emulation.