GUI 模拟单个电梯运行，电梯按钮分上下两排，按钮可以自动随机亮，电梯会根据亮的情况自动运行-This program is using Java to simulate the elevator, which will running automatically based on the randomly generated button.

模拟一个非捎带电梯的运行过程，附带c语言程序和说明文档(Simulation of a non piggyback elevator operation process, with C language program and documentation)