电梯仿真程序． 某国际贸易中心共40层，设有载客电梯10部（用E0~E9标识）。利用多线程技术实现个电梯载客的仿真情况。-elevator simulation program. An international trade center with a total of 40 layers, with 10 passenger elevators (E0-use E9 logo). The use of multithreading technology-passenger lift of