diff --git a/TinySTL/Algorithm.h b/TinySTL/Algorithm.h
new file mode 100644
index 0000000..2bb7d18
--- /dev/null
+++ b/TinySTL/Algorithm.h
@@ -0,0 +1,44 @@
+#ifndef _ALGORITHM_H_
+#define _ALGORITHM_H_
+
+#include <cstring>
+
+namespace TinySTL{
+	//********* fill ********************
+	template<class ForwardIterator, class T>
+	void fill(ForwardIterator first, ForwardIterator last, const T& value)
+	{
+		for (; first != last; ++first)
+			*first = value;
+	}
+	inline void fill(char *first, char *last, const char& value)
+	{
+		memset(first, static_cast<unsigned char>(value), last - first);
+	}
+	inline void fill(wchar_t *first, wchar_t *last, const wchar_t& value)
+	{
+		memset(first, static_cast<unsigned char>(value), (last - first) * sizeof(wchar_t));
+	}
+	//********* fill_n ********************
+	template<class OutputIterator, class Size, class T>
+	OutputIterator fill_n(OutputIterator first, Size n, const T& value)
+	{
+		for (; n > 0; --n, ++first)
+			*first = value;
+		return first;
+	}
+	template<class Size>
+	void *fill_n(char *first, Size n, const char& value)
+	{
+		memset(first, static_cast<unsigned char>(value), n);
+		return first + n;
+	}
+	template<class Size>
+	void *fill_n(wchar_t *first, Size n, const wchar_t& value)
+	{
+		memset(first, static_cast<unsigned char>(value), n * sizeof(wchar_t));
+		return first + n;
+	}
+}
+
+#endif
\ No newline at end of file
diff --git a/TinySTL/TinySTL.vcxproj b/TinySTL/TinySTL.vcxproj
index 1932559..3000608 100644
--- a/TinySTL/TinySTL.vcxproj
+++ b/TinySTL/TinySTL.vcxproj
@@ -79,6 +79,7 @@
     <ClCompile Include="main.cpp" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="Algorithm.h" />
     <ClInclude Include="Alloc.h" />
     <ClInclude Include="Allocator.h" />
     <ClInclude Include="Construct.h" />
diff --git a/TinySTL/TinySTL.vcxproj.filters b/TinySTL/TinySTL.vcxproj.filters
index d4980ba..c6fe811 100644
--- a/TinySTL/TinySTL.vcxproj.filters
+++ b/TinySTL/TinySTL.vcxproj.filters
@@ -41,5 +41,8 @@
     <ClInclude Include="Vector.h">
       <Filter>头文件</Filter>
     </ClInclude>
+    <ClInclude Include="Algorithm.h">
+      <Filter>头文件</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/TinySTL/UninitializedFunctions.h b/TinySTL/UninitializedFunctions.h
index 1bb4d5c..4c8149c 100644
--- a/TinySTL/UninitializedFunctions.h
+++ b/TinySTL/UninitializedFunctions.h
@@ -1,6 +1,7 @@
 #ifndef _UNINITIALIZED_FUNCTIONS_H_
 #define _UNINITIALIZED_FUNCTIONS_H_
 
+#include "Algorithm.h"
 #include "Construct.h"
 #include "Iterator.h"
 #include "TypeTraits.h"
@@ -52,9 +53,7 @@ namespace TinySTL{
 	template<class ForwardIterator, class T>
 	void _uninitialized_fill_aux(ForwardIterator first, ForwardIterator last,
 		const T& value, _true_type){
-		//TODO
-		//»»³É×Ô¼ºµÄfillº¯Êý
-		std::fill(first, last, value);
+		fill(first, last, value);
 	}
 	template<class ForwardIterator, class T>
 	void _uninitialized_fill_aux(ForwardIterator first, ForwardIterator last,
@@ -82,9 +81,7 @@ namespace TinySTL{
 	template<class ForwardIterator, class Size, class T>
 	ForwardIterator _uninitialized_n_fill_aux(ForwardIterator first,
 		Size n, const T& x, _true_type){
-		//TODO
-		//»»³É×Ô¼ºµÄfill_nº¯Êý
-		return std::fill_n(first, n, x);
+		return fill_n(first, n, x);
 	}
 	template<class ForwardIterator, class Size, class T>
 	ForwardIterator _uninitialized_n_fill_aux(ForwardIterator first,
diff --git a/TinySTL/main.cpp b/TinySTL/main.cpp
index d3c30ef..e138036 100644
--- a/TinySTL/main.cpp
+++ b/TinySTL/main.cpp
@@ -15,23 +15,8 @@ int main(){
 	int array[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
 	//TinySTL::vector<int> svec(array, array + 5);
 	//svec.erase(svec.begin() + 1, svec.begin() + 4);//1,5
-	TinySTL::vector<int> svec;
-	cout << svec.capacity() << endl;
-	svec.push_back(1);
-	cout << svec.capacity() << endl;
-	svec.push_back(2);
-	cout << svec.capacity() << endl;
-	svec.push_back(3);
-	cout << svec.capacity() << endl;
-	svec.push_back(4);
-	cout << svec.capacity() << endl;
-	svec.push_back(5);
-	cout << svec.capacity() << endl;
-	svec.push_back(6);
-	cout << svec.capacity() << endl;
-	svec.push_back(7);
-	cout << svec.capacity() << endl;
-	//svec.insert(svec.begin() + 0, array, array + 10);
+	TinySTL::vector<int> svec(10, 0);
+	svec.insert(svec.begin() + 0, array, array + 10);
 	//svec.insert(svec.begin()+0, 10, 99);
 	for (auto s : svec){ cout << s << endl; }
 	system("pause");