function wordcount(path::AbstractString)
	info = wordinfo(path)
	println("文件数：", info[1])
	println("行数：", info[2])
	println("字符数：", info[3])
end

function wordinfo(path::AbstractString)
	if isfile(path)
		io=open(path, "r")
		str=read(io, String)
		close(io)
		return (1, count("\n", str), length(str))
	elseif isdir(path)
		vec=readdir(path; join=true, sort=false)
		file, line, char = (0, 0, 0)
		for child in vec
			n_file, n_line, n_char = wordinfo(child)
			file+=n_file; line+=n_line; char+=n_char
		end
		return (file, line, char)
	else
		error("invalid path < $path >")
	end
end