_help.h

Unix shell是unix的命令解释程序

#include<stdio.h>
int _help()
{
	printf("All the commands are:\n");
	printf("dir <directory>		   :list all the files in this directory.\n");
	printf("cd <directory>		   :change the working directory.\n");
	printf("pwd        	           :display the name of the directory.\n");
	printf("md <directory  		   :make a directory.>\n");
	printf("copy <source><targt>	   :copy files and directories.\n");
	printf("find           		   :find a file in a directory.\n");
	printf("more <file>  		   :display the file page by page.\n");
	printf("date  		           :display the date.\n");
	printf("time         	           :display the time.\n");
	printf("ren <old name><new name>   :rename a file of a directory.\n");
	printf("del <file or directory>    :delete a file of a directory.\n");
	printf("exit                       :quit this program.\n");
	printf("Thanks for your support!\n");
}