diff --git a/Segment.cpp b/Segment.cpp
index be56218..9703601 100644
--- a/Segment.cpp
+++ b/Segment.cpp
@@ -22,7 +22,43 @@ namespace CppJieba
 
 	bool Segment::cutDAG(const string& chStr, vector<string>& res)
 	{
+		res.clear();
+		char utfBuf[bufSize];
+		ChUnicode uniStr[bufSize];
+		memset(uniStr, 0, sizeof(uniStr));
+		size_t len = _utf8ToUni(chStr, uniStr, bufSize);
+		if(0 == len)
+		{
+			LogError("_utf8ToUni failed.");
+			return false;
+		}
+
+		//calc DAG
+		vector<vector<uint> > dag;
+		for(uint i = 0; i < len; i++)
+		{
+			vector<uint> vec;
+			vec.push_back(i);
+			for(uint j = i + 2; j <= len; j++)
+			{
+				if(NULL != _trie.find(uniStr + i, j - i))
+				{
+					vec.push_back(j - 1);
+				}
+			}
+			dag.push_back(vec);
+		}
+		PRINT_MATRIX(dag);
+		getchar();
+
 		
+
+		//calc dp
+		
+
+
+		
+		return true;
 	}
 
 
@@ -129,6 +165,12 @@ namespace CppJieba
 		return len;
 		
 	}
+
+	bool Segment::_calcDP(const ChUnicode* uniStr, size_t len, vector<pair<uint, double> >& res)
+	{
+		return true;
+	}
+
 }
 
 
@@ -141,8 +183,8 @@ int main()
 	segment.init("jieba.dict.utf8");
 	
 	vector<string> res;
-	string title = "我来到北京清华大学3D电视";
-	bool flag = segment.cutMM(title, res);
+	string title = "我来到北京清华大学";
+	bool flag = segment.cutDAG(title, res);
 	if(flag)
 	{
 		for(int i = 0; i < res.size(); i++)
diff --git a/Segment.h b/Segment.h
index fc9834a..d3fb150 100644
--- a/Segment.h
+++ b/Segment.h
@@ -22,6 +22,7 @@ namespace CppJieba
 
 		private:
 			size_t _utf8ToUni(const string& chStr, ChUnicode* uniStr, size_t size);
+			bool _calcDP(const ChUnicode* uniStr, size_t len, vector<pair<uint, double> >& res);
 
 		private:
 			enum {bufSize = 1024};
diff --git a/Trie.h b/Trie.h
index bcec12a..07cad6a 100644
--- a/Trie.h
+++ b/Trie.h
@@ -44,52 +44,6 @@ namespace CppJieba
         }
     };
 
-	/*
-    struct TrieNodeIterator
-    {
-        TrieNode* ptNode;
-        
-        TrieNodeIterator():ptNode(NULL)
-        {
-        }
-
-        TrieNodeIterator(TrieNode* ptr):ptNode(NULL)
-        {
-            ptNode = ptr;
-        }
-
-        const int operator++(int)
-        {
-            return 1;
-        }
-
-        TrieNodeIterator& operator++()
-        {
-            return *this;
-        }
-
-        TrieNode& operator*() const
-        {
-            return *ptNode;
-        }
-
-        TrieNode* operator->() const
-        {
-            return ptNode;
-        }
-        
-        bool operator==(const TrieNodeIterator& x) const
-        {
-            return ptNode == x.ptNode;
-        }
-        
-        bool operator!=(const TrieNodeIterator& x) const
-        {
-            return ptNode != x.ptNode;
-        }
-    };
-	*/
-
     class Trie
     {
         private:
@@ -115,16 +69,10 @@ namespace CppJieba
 
 		public:
 			const TrieNodeInfo* find(const ChUnicode* const chUniStr, size_t len);
-            //bool find(const ChUnicode* chUniStr, size_t len);
-			//bool find(const vector<ChUnicode>& uniVec);
 			int findMaxMatch(const ChUnicode* chUniStr, size_t len);
 
 		public:
 			double getWeight(const ChUnicode* uniStr, size_t len);
-            //bool cut(const ChUnicode* chUniStr, size_t len, vector< vector<size_t> >& res);
-			//bool cutUni(const vector<ChUnicode>& uniVec, )
-			//bool cutUtf8(const string& str, vector< vector<size_t> >& res);
-			//bool cutMa
 
         private:
 			bool _buildTree(const char* const filePath);
diff --git a/globals.h b/globals.h
index c495050..7db0f1e 100644
--- a/globals.h
+++ b/globals.h
@@ -8,6 +8,7 @@ const char * const DICT_FILE_PATH = "dict.txt";
 
 //typedefs
 typedef uint16_t ChUnicode;
+typedef unsigned int uint;
 
 
 #endif