利用C语言编写一个微型命令解释程序，接受并解释以下命令：dir：列当前目录；cop 文件1，文件2：拷贝文件；era 文件名：删除文件；dis 文件名：显示字符串；end:结束并退出；命令前后有空格为合法命令。-Using C language to write a mini-command interpreter, to accept and explain the following command: dir: out the current directory　cop file 1, file 2: Copy the file　era Filename: delete the file　dis File Name: Displays the string　end: end and exit　command before and after the space of a lawful order.