diff --git a/Course.h b/Course.h
new file mode 100644
index 0000000..dfe8583
--- /dev/null
+++ b/Course.h
@@ -0,0 +1,31 @@
+/*
+* 课程表DAO
+*/
+#ifndef COURSE_H
+#define COURSE_H
+
+#include<string>
+using std::string;
+class Course
+{
+public:
+	Course() { ; }
+	Course(string id, string name) {
+		this->id = id;
+		this->name = name;
+	}
+
+	string getId() { return id; }
+	void setId(string id) { this->id = id; }
+	string getName() { return name; }
+	void setName(string name) { this->name = name; }
+
+	string toString() {
+		return id + "\t" + name;
+	}
+private:
+	string id;//课程号
+	string name;//课程名
+};
+
+#endif // !COURSE_H
\ No newline at end of file
diff --git a/CourseDAO.h b/CourseDAO.h
index 4354dbe..c05de6a 100644
--- a/CourseDAO.h
+++ b/CourseDAO.h
@@ -8,7 +8,7 @@
 
 #include<iostream>
 #include<vector>
-#include"Course.cpp"
+#include"Course.h"
 
 /*
 * 向数据库添加课程
diff --git a/Grade.cpp b/Grade.h
similarity index 92%
rename from Grade.cpp
rename to Grade.h
index eab0573..c7b2a99 100644
--- a/Grade.cpp
+++ b/Grade.h
@@ -1,8 +1,8 @@
 /*
 * 成绩表DAO
 */
-#ifndef GRADE_CPP
-#define GRADE_CPP
+#ifndef GRADE_H
+#define GRADE_H
 
 #include<string>
 using std::string;
@@ -33,4 +33,4 @@ private:
 	string grade;//成绩
 };
 
-#endif // !GRADE_CPP
\ No newline at end of file
+#endif // !GRADE_H
\ No newline at end of file
diff --git a/GradeDAO.h b/GradeDAO.h
index d1c08af..d775756 100644
--- a/GradeDAO.h
+++ b/GradeDAO.h
@@ -8,7 +8,7 @@
 
 #include<iostream>
 #include<vector>
-#include"Grade.cpp"
+#include"Grade.h"
 
 /*
 * 向数据库添加成绩
diff --git a/SAS.vcxproj b/SAS.vcxproj
index a291431..542136c 100644
--- a/SAS.vcxproj
+++ b/SAS.vcxproj
@@ -127,25 +127,25 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ClCompile Include="Course.cpp" />
     <ClCompile Include="CourseDAOImpl.cpp" />
     <ClCompile Include="DBCUtils.cpp" />
-    <ClCompile Include="Grade.cpp" />
     <ClCompile Include="GradeDAOImpl.cpp" />
     <ClCompile Include="main.cpp" />
     <ClCompile Include="Menu.cpp" />
     <ClCompile Include="MenuUtils.cpp" />
     <ClCompile Include="StringUtils.cpp" />
-    <ClCompile Include="Student.cpp" />
     <ClCompile Include="StudentDAOImpl.cpp" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="Course.h" />
     <ClInclude Include="CourseDAO.h" />
     <ClInclude Include="DBCUtils.h" />
+    <ClInclude Include="Grade.h" />
     <ClInclude Include="GradeDAO.h" />
     <ClInclude Include="Menu.h" />
     <ClInclude Include="MenuUtils.h" />
     <ClInclude Include="StringUtils.h" />
+    <ClInclude Include="Student.h" />
     <ClInclude Include="StudentDAO.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/SAS.vcxproj.filters b/SAS.vcxproj.filters
index ae1039f..ad61ddc 100644
--- a/SAS.vcxproj.filters
+++ b/SAS.vcxproj.filters
@@ -18,15 +18,6 @@
     <ClCompile Include="main.cpp">
       <Filter>婧愭枃浠�</Filter>
     </ClCompile>
-    <ClCompile Include="Student.cpp">
-      <Filter>婧愭枃浠�</Filter>
-    </ClCompile>
-    <ClCompile Include="Course.cpp">
-      <Filter>婧愭枃浠�</Filter>
-    </ClCompile>
-    <ClCompile Include="Grade.cpp">
-      <Filter>婧愭枃浠�</Filter>
-    </ClCompile>
     <ClCompile Include="DBCUtils.cpp">
       <Filter>婧愭枃浠�</Filter>
     </ClCompile>
@@ -71,5 +62,14 @@
     <ClInclude Include="StringUtils.h">
       <Filter>澶存枃浠�</Filter>
     </ClInclude>
+    <ClInclude Include="Course.h">
+      <Filter>澶存枃浠�</Filter>
+    </ClInclude>
+    <ClInclude Include="Student.h">
+      <Filter>澶存枃浠�</Filter>
+    </ClInclude>
+    <ClInclude Include="Grade.h">
+      <Filter>澶存枃浠�</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/Student.cpp b/Student.h
similarity index 93%
rename from Student.cpp
rename to Student.h
index bc9d0de..862ed0b 100644
--- a/Student.cpp
+++ b/Student.h
@@ -1,8 +1,8 @@
 /*
 * 学生表DAO
 */
-#ifndef STUDENT_CPP
-#define STUDENT_CPP
+#ifndef STUDENT_H
+#define STUDENT_H
 
 #include<string>
 using std::string;
@@ -39,4 +39,4 @@ private:
 	string status;//状态（在读、休学、退学）
 };
 
-#endif // !STUDENT_CPP
\ No newline at end of file
+#endif // !STUDENT_H
\ No newline at end of file
diff --git a/StudentDAO.h b/StudentDAO.h
index 7a884a6..1fbee6b 100644
--- a/StudentDAO.h
+++ b/StudentDAO.h
@@ -8,7 +8,7 @@
 
 #include<iostream>
 #include<vector>
-#include"Student.cpp"
+#include"Student.h"
 
 /*
 * 向数据库添加学生