diff --git a/ccv/sheet1/CMakeLists.txt b/ccv/sheet1/CMakeLists.txt
index e69de29..fa2d69a 100644
--- a/ccv/sheet1/CMakeLists.txt
+++ b/ccv/sheet1/CMakeLists.txt
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 2.8)
+add_library(Rectangle Rectangle.cpp)
+project(sheet1)
+add_executable(main main.cpp)
+target_link_libraries(main Rectangle)
+add_executable(hello hello.cpp)
+add_executable(AskInteger AskInteger.cpp)
diff --git a/ccv/sheet1/Rectangle.cpp b/ccv/sheet1/Rectangle.cpp
index 7d30a0c..0349cc6 100644
--- a/ccv/sheet1/Rectangle.cpp
+++ b/ccv/sheet1/Rectangle.cpp
@@ -2,29 +2,16 @@
 // Created by jim on 4/4/17.
 //
 #include <iostream>
+#include "Rectangle.h"
 using namespace std;
 
-class Rectangle
+Rectangle::Rectangle(unsigned int width, unsigned int height)
 {
-private:
-    unsigned int width;
-    unsigned int height;
-
-public:
-    Rectangle(unsigned int width, unsigned int height)
-    {
-      this->width = width;
-      this->height = height;
-    }
-
-    unsigned int area()
-    {
-      return this->height * this->width;
-    }
-};
-
-int main()
-{
-  Rectangle* rec = new Rectangle(10, 20);
-  cout << rec->area() << endl;
+  this->width = width;
+  this->height = height;
+}
+
+unsigned int Rectangle::area()
+{
+  cout << this->width * this->height << endl;
 }
diff --git a/ccv/sheet1/Rectangle.h b/ccv/sheet1/Rectangle.h
new file mode 100644
index 0000000..c2eb999
--- /dev/null
+++ b/ccv/sheet1/Rectangle.h
@@ -0,0 +1,19 @@
+//
+// Created by jim on 4/4/17.
+//
+
+#ifndef SHEET1_RECTANGLE_H
+#define SHEET1_RECTANGLE_H
+
+class Rectangle
+{
+private:
+    unsigned int width;
+    unsigned int height;
+
+public:
+    Rectangle(unsigned int, unsigned int);
+    unsigned int area();
+};
+
+#endif //SHEET1_RECTANGLE_H
diff --git a/ccv/sheet1/main.cpp b/ccv/sheet1/main.cpp
new file mode 100644
index 0000000..d7219c2
--- /dev/null
+++ b/ccv/sheet1/main.cpp
@@ -0,0 +1,11 @@
+//
+// Created by jim on 4/4/17.
+//
+#include "Rectangle.h"
+
+int main()
+{
+  Rectangle* rec = new Rectangle(20, 10);
+  rec->area();
+  return 0;
+}