排队论 M/M/K 模拟。 VC6.0 环境下调试通过。 运行时输入到达率， 离开率和服务器个数， 输出为平均队伍长度。-Queuing theory M/M/K analog. VC6.0 environment to debug through. Run-time input arrival rate, departure rate and the number of servers, the output length of average ranks.