我们在写程序的过程中,有些时候需要知道一些电脑的硬件信息,比如我们写一些需要注册的程序的时候,就需要得到某个电脑特定的信息,一般来说,网卡的物理地址是不会重复的,-We are in the process of writing procedures, sometimes need to know some computer hardware information, such as we need to write the registration procedures for some ti