更新README

README.md

@@ -1,26 +1,46 @@
-# BinaryStringRW
-####read out binary as string and write binary (string) in files to reduct.
-####本算法用来测试将二进制以字符串的形式读出与将字符串（二进制形式）写入原文件，保持数据不变
-------------------------------
-####this algorithm is used to read file's binary out as string then write those binary(string) into a new file to reduct the raw file
-by Kanch @2015-10-4     
-http://akakanch.com    
-kanch@akakanch.com   
-core algorithm included in BinaryStringRWAlgorithm files :)
-.
-------------------------------------------
-######NOTICE
-######You may need set up files below to make this main function works
-const char* testfilepath = "C:\\binalgtest\\rawfile.txt";      //the raw file path(file you used to read out binary)   
-const char* binarydatapath = "C:\\binalgtest\\binstring.txt";    //binary string path(file used to save binary-string)   
-const char* targetfilepath = "C:\\binalgtest\\reductionfile.txt";    //reduction file via a known binary string   
-.
------------------------------------------------
-you may need doc below to understand some points of this algorithm
-https://docs.google.com/drawings/d/1odXlKXx6MggQvDeObna4wYsEd_kVF23HoaM_Si7z32M/edit?usp=sharing
-.
----------------------------------------
-any way,hope this algorithm can help you.
-I mean,when you read a file's binary out,you know,you can analyize it,then,you know what can you do with it.
-but there are still some problems,like portable,or the effectiveness.
-so I hope you guys can help me to fix it,make it much better. :)
+# BinRW
+
+该算法用于读取文件二进制数据。或者从已有二进制数据恢复文件。
+
+by Kanch -> kanchisme at gmail . com 
+
+# 算法示例
+
+假设有一个文件，内容如下：
+```
+this is a test by Kanch.
+```
+
+在经过本程序处理后，得到其二进制代码如下：
+```
+001011100001011010010110110011100000010010010110110011100000010010000110000001000010111010100110110011100010111000000100010001101001111000000100110100101000011001110110110001100001011001110100
+```
+同理，可以由以上二进制代码恢复源文件。
+
+# 使用方法
+
+#### 调用命令：
+
+> brw [input-file] [output-file] [mode: -a(all),-r(range)] [l-range] [r-range]
+
+#### 参数解释：
+
+`input-file`: 需要处理的源文件路径
+
+`output-file`:输出的目标文件路径，如果该项为“-”则在命令行输出结果
+
+`mode`:处理模式，`-a` 全部读取，`-r` 按照区间读取，`-rdt` 从二进制恢复文件
+
+`l-range`:如果模式为 -r，则这里输入读取起始位置（单位bit）
+
+`r-range`:如果模式为 -r，则这里输入读取结束位置（单位bit，带范围检查）
+
+**注意：如果在-r模式先仅给出一个值（l-range或者r-range），程序将会从文件起始位置读取到给定值位置。
+
+# 其它
+
+您可以在GPL协议下自由修改本代码。
+
+![GPL](https://www.gnu.org/graphics/gplv3-127x51.png)
+
+