Ruby文件的读写

Ruby文件的读写： 

class WenJian
    def  fln(a)
	    @fln = a
	end
	def  lines                                         # 输出行数
	   @lines = File.readlines(@fln)
       @lines = @lines.size	 
       puts "文件行数：#{@lines}"	 
	end
	def  the_front_of_the_file                         
	     puts "文章如下:——————————"
	end
	def  the_end_of_the_file
	     puts "文章结束!——————————"
	end
    def  linesread                                     # 按行读文件
	   the_front_of_the_file
	   @arr = IO.readlines(@fln)
	   @lines = File.readlines(@fln)
       n = @lines.size - 1 
	    for i in (0..n)
	     puts @arr[i]
		end
	   the_end_of_the_file
	end
	def blockread                                      # 按块读文件
	   the_front_of_the_file
	   IO.foreach(@fln){|block| puts block}
	   the_end_of_the_file
	end
	def rwr                                            # 重新读写文件(行)
	    aFile = File.new(@fln, "r+")  
		if aFile
		  a = gets
		  aFile.syswrite(a)
		else
		  puts "打开文件失败!"
		end
	end
	def awr
  	    aFile = File.new(@fln, "a")  
		if aFile
		  a = gets
		  aFile.syswrite(a)
		else
		  puts "打开文件失败!"
		end
	end
end

如有错漏，请在评论留言。