diff --git a/README.md b/README.md
index 3a7f548..5836871 100644
--- a/README.md
+++ b/README.md
@@ -16,16 +16,30 @@ TransCode.cpp/TransCode.h 负责转换编码类型，将utf8和gbk都转换成`u
 HMMSegment.cpp/HMMSegment.h
 是根据HMM模型来进行分词，主要算法思路是根据(B,E,M,S)四个状态来代表每个字的隐藏状态。
 HMM模型由dicts/下面的`hmm_model.utf8`提供。
+分词算法即viterbi算法。
 
 ##Demo
 
 ### Segment's demo
+运行方法示例:
 ```
 cd ./demo;
 make;
 ./segment_demo testlines.gbk
 ```
 
+Output:
+```
+我来到北京清华大学
+我/来到/北京/清华大学
+
+他来到了网易杭研大厦
+他/来到/了/网易/杭/研/大厦
+
+小明硕士毕业于中国科学院计算所，后在日本京都大学深造
+小/明/硕士/毕业/于/中国科学院/计算所/，/后/在/日本京都大学/深造
+```
+
 run `./segment_demo` to get help.
 
 ```
diff --git a/demo/segment_demo.cpp b/demo/segment_demo.cpp
index dfa88ca..dd3b99c 100644
--- a/demo/segment_demo.cpp
+++ b/demo/segment_demo.cpp
@@ -58,7 +58,7 @@ int main(int argc, char ** argv)
 	*/
 	if(argc < 2)
 	{
-		cout<<"usage: \n\t"<<argv[0]<<" <filename> [options]\n"
+		cout<<"usage: \n\t"<<argv[0]<<"[options] <filename>\n"
 		    <<"options:\n"
 		    <<"\t--dictpath\tIf is not specified, the default is ../dicts/jieba.dict.utf8\n"
 		    <<"\t--encoding\tSupported encoding methods are [gbk, utf-8] for now. \n\t\t\tIf is not specified, the default is utf8.\n"
diff --git a/test/dict.txt b/test/dict.txt
deleted file mode 100644
index f435f34..0000000
--- a/test/dict.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-AT&T 3 nz
-B超 3 n
-C# 3 nz
-C++ 3 nz
-一一 1670 m
-一一二 11 m