根据ModelSim提供的命令或者Tcl/Tk语言的语法，将仿真Cmd流程的仿真命令依次编写到扩展名为“do”的宏文件中，然后直接执行这个DO文件，就可以完成整个仿真流程

1.创建目录，学习DO文件

2.启动ModelSim，执行DO文件

3.执行仿真，观测波形-ModelSim command according to the syntax provided or Tcl/Tk language emulation process simulation Cmd command sequentially written to the macro file extension　do , and then　 the DO file directly, you can complete the entire simulation process

1. Create a directory to learn DO file

2. Start ModelSim,　 DO file

3. Perform simulation waveform observation