diff --git a/src/structs.h b/src/structs.h
index e977021..2c01cef 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -26,6 +26,12 @@ namespace CppJieba
         TrieNodeInfo(const Unicode& _word):word(_word),freq(0),logFreq(MIN_DOUBLE)
         {
         }
+		string toString()const
+		{
+            string tmp;
+            TransCode::encode(word, tmp);
+            return string_format("{word:%s,freq:%d, logFreq:%lf}", tmp.c_str(), freq, logFreq);
+		}
     };
 
     typedef unordered_map<uint, const TrieNodeInfo*> DagType;