diff --git a/TinySTL/Test/TestUtil.h b/TinySTL/Test/TestUtil.h
index 30d8867..da01bd7 100644
--- a/TinySTL/Test/TestUtil.h
+++ b/TinySTL/Test/TestUtil.h
@@ -3,6 +3,7 @@
 
 #include <iterator>
 #include <iostream>
+#include <string>
 
 #include "..\Algorithm.h"
 
@@ -10,8 +11,8 @@ namespace TinySTL{
 	namespace Test{
 
 		template<class Container>
-		void print_container(Container& container){//不是每一个容器都有const_iterator
-			std::cout << "Container : ";
+		void print_container(Container& container, const std::string& name = ""){//不是每一个容器都有const_iterator
+			std::cout << "Container " << name << " :";
 			for (auto val : container){
 				std::cout << val << " ";
 			}