diff --git a/demo/keywordext_demo.cpp b/demo/keywordext_demo.cpp
index b2e86c8..f3d71f0 100644
--- a/demo/keywordext_demo.cpp
+++ b/demo/keywordext_demo.cpp
@@ -15,6 +15,11 @@ void testKeyWordExt(const char * dictPath, const char * filePath)
 		cerr<<__FILE__<<__LINE__<<endl;
 		return ;
 	}
+	if(!ext.loadStopWords("../dicts/stopwords.gbk.v1.0"))
+	{
+		cerr<<__FILE__<<__LINE__<<endl;
+		return ;
+	}
 	ifstream ifile(filePath);
 	vector<string> res;
 	string line;
diff --git a/src/cppcommon/Makefile b/src/cppcommon/Makefile
index 422f612..88720e4 100644
--- a/src/cppcommon/Makefile
+++ b/src/cppcommon/Makefile
@@ -29,6 +29,8 @@ io_functs.test: io_functs.cpp io_functs.h
 	g++ -o $@ $< -DTEST_IO_FUNCTS
 str_functs.ut: str_functs.cpp str_functs.h
 	g++ -o $@ $< -DTEST_STR_FUNCTS 
+argv_functs.ut: argv_functs.cpp str_functs.cpp argv_functs.h
+	g++ -o $@ argv_functs.cpp str_functs.cpp -DARGV_FUNCTS_UT
 encoding.ut: encoding.cpp str_functs.cpp str_functs.h encoding.h
 	g++ -o $@ encoding.cpp str_functs.cpp -DENCODING_UT 
 vec_functs.test: vec_functs.cpp vec_functs.h vec_functs.tcc
diff --git a/src/cppcommon/argv_functs.cpp b/src/cppcommon/argv_functs.cpp
new file mode 100644
index 0000000..504fa61
--- /dev/null
+++ b/src/cppcommon/argv_functs.cpp
@@ -0,0 +1,42 @@
+#include "argv_functs.h"
+
+namespace CPPCOMMON
+{
+	bool getArgvMap(int argc, char** argv, map<string,string>& mpss)
+	{
+		mpss.clear();
+		for(int i = 0; i < argc; i++)
+		{
+			if(strStartsWith(argv[i], "--"))
+			{
+				if(i + 1 < argc && !strStartsWith(argv[i+1], "--"))
+				{
+					mpss[argv[i]] = argv[i+1];
+					i++;
+				}
+				else
+				{
+					return false;
+				}
+			}
+		}
+		return true;
+	}
+
+	
+}
+
+
+#ifdef ARGV_FUNCTS_UT
+
+using namespace CPPCOMMON;
+
+int main(int argc, char** argv)
+{
+	map<string,string> argvMap;
+	getArgvMap(argc, argv, argvMap);
+	PRINT_MAPSS(argvMap);
+	return 0;
+}
+
+#endif
diff --git a/src/cppcommon/argv_functs.h b/src/cppcommon/argv_functs.h
new file mode 100644
index 0000000..a7e18c8
--- /dev/null
+++ b/src/cppcommon/argv_functs.h
@@ -0,0 +1,18 @@
+/************************************
+ * file enc : ascii
+ * author   : wuyanyi09@gmail.com
+************************************/
+
+#ifndef CPPCOMMON_ARGV_FUNCTS_H
+#define CPPCOMMON_ARGV_FUNCTS_H
+
+#include "str_functs.h"
+#include "map_functs.h"
+
+namespace CPPCOMMON
+{
+	using namespace std;
+	bool getArgvMap(int argc,  char** argv, map<string, string>& mpss);
+}
+
+#endif
diff --git a/src/cppcommon/headers.h b/src/cppcommon/headers.h
index a242a9d..3190b71 100644
--- a/src/cppcommon/headers.h
+++ b/src/cppcommon/headers.h
@@ -9,5 +9,7 @@
 #include "config.h"
 #include "typedefs.h"
 #include "str_functs.h"
+#include "map_functs.h"
+#include "arfv_functs.h"
 
 #endif
diff --git a/src/cppcommon/map_functs.h b/src/cppcommon/map_functs.h
new file mode 100644
index 0000000..833da38
--- /dev/null
+++ b/src/cppcommon/map_functs.h
@@ -0,0 +1,18 @@
+/************************************
+ * file enc : ascii
+ * author   : wuyanyi09@gmail.com
+************************************/
+
+
+#ifndef CPPCOMMON_MAP_FUNCTS_H
+#define CPPCOMMON_MAP_FUNCTS_H
+
+#define PRINT_MAPSS(mpss) \
+{\
+	for(map<string, string>::const_iterator it = mpss.begin(); it != mpss.end(); it++)\
+	{\
+		cout<<it->first<<' '<<it->second<<endl;\
+	}\
+}
+
+#endif
diff --git a/src/cppcommon/str_functs.cpp b/src/cppcommon/str_functs.cpp
index 8a5a6a9..50e3954 100644
--- a/src/cppcommon/str_functs.cpp
+++ b/src/cppcommon/str_functs.cpp
@@ -7,7 +7,7 @@
 namespace CPPCOMMON
 {
 	//http://stackoverflow.com/questions/2342162/stdstring-formatting-like-sprintf
-	std::string string_format(const std::string fmt, ...) 
+	string string_format(const string fmt, ...) 
 	{
 		int size = 100;
 		std::string str;
@@ -407,6 +407,11 @@ namespace CPPCOMMON
 		return res;
 	}
 
+	bool strStartsWith(const string& str, const string& prefix)
+	{
+		return str.substr(0, prefix.size()) == prefix;
+	}
+
 }
 
 #ifdef TEST_STR_FUNCTS
@@ -452,16 +457,16 @@ int main()
     //    cout<<utf8str<<endl;
     //}
 	//cout<<string_format("hehe%s11asd%dasf","[here]",2);
-	ifstream ifile("testdata/dict.gbk");
-	string line;
-	Unicode unicode;
-	while(getline(ifile, line))
-	{
-		cout<<line<<endl;
-		utf8ToUnicode(line, unicode);
-		printUnicode(unicode);
-		cout<<unicodeToUtf8(unicode)<<endl;;
-	}
+	//ifstream ifile("testdata/dict.gbk");
+	//string line;
+	//Unicode unicode;
+	//while(getline(ifile, line))
+	//{
+	//	cout<<line<<endl;
+	//	utf8ToUnicode(line, unicode);
+	//	printUnicode(unicode);
+	//	cout<<unicodeToUtf8(unicode)<<endl;;
+	//}
 	//vector<string> tmp;
 	//tmp.push_back("1");
 	////tmp.push_back("2");
@@ -476,6 +481,12 @@ int main()
 	//	s = utf8ToGbk(s);
 	//	cout<<s<<endl;
 	//}
+	cout<<strStartsWith("--help","--")<<endl;
+	cout<<strStartsWith("--help","-")<<endl;
+	cout<<strStartsWith("--help","he")<<endl;
+	cout<<strStartsWith("help","help")<<endl;
+	cout<<strStartsWith("","help")<<endl;
+	cout<<strStartsWith("hel","")<<endl;
 	return 0;
 }
 #endif
diff --git a/src/cppcommon/str_functs.h b/src/cppcommon/str_functs.h
index c101680..293e74f 100644
--- a/src/cppcommon/str_functs.h
+++ b/src/cppcommon/str_functs.h
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ascii
  * author   : wuyanyi09@gmail.com
 ************************************/
 #ifndef CPPCOMMON_STR_FUNCTS_H
@@ -20,7 +20,7 @@
 namespace CPPCOMMON
 {
 	using namespace std;
-	std::string string_format(const std::string fmt, ...) ;
+	string string_format(const string fmt, ...) ;
 	string joinStr(const vector<string>& source, const string& connector);
 	vector<string> splitStr(const string& source, const string& pattern = " \t\n");
 	void splitStr(const string& source, vector<string>& out_vec, const string& pattern = " \t\n");
@@ -67,6 +67,7 @@ namespace CPPCOMMON
 		cout<<uniVecToStr(unicode)<<endl;
 	}
 
+	bool strStartsWith(const string& str, const string& prefix);
 	
 }
 #endif
diff --git a/src/cppcommon/vec_functs.h b/src/cppcommon/vec_functs.h
index 2fd9d5a..0144f2f 100644
--- a/src/cppcommon/vec_functs.h
+++ b/src/cppcommon/vec_functs.h
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ascii
  * author   : wuyanyi09@gmail.com
 ************************************/
 #ifndef CPPCOMMON_VEC_FUNCTS_H