diff --git a/CPlusPlus20ForProgrammers-master/examples/shapes/a.out b/CPlusPlus20ForProgrammers-master/examples/shapes/a.out
new file mode 100755
index 0000000..0d19890
Binary files /dev/null and b/CPlusPlus20ForProgrammers-master/examples/shapes/a.out differ
diff --git a/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.cpp b/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.cpp
new file mode 100644
index 0000000..36b8e4e
--- /dev/null
+++ b/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.cpp
@@ -0,0 +1,52 @@
+
+/*class GBaseShape {
+	public:
+    GBaseShape();
+virtual void  EvalVolume();
+virtual void  EvalSurface();
+double GetVolume() const;
+double GetVolume() const;
+
+	private:
+    double Volume, Surface;
+    bool IfVolumeCalculated;
+    bool IfSurfaceCalculated;
+};
+*/
+
+
+
+
+class Cube {
+  public:
+      explicit 	Cube(double _L = 0, double _W = 0, double _H = 0);
+ //     void SetAll();
+      void SetL(double _L);
+//      void SetB(double _B);
+//      void SetC(double _C);
+
+      const double& GetL();
+  private:
+      double L,W,H;
+};
+
+
+Cube::Cube(double _L , double _W , double _H ){
+   SetL(_L); 
+}
+
+void Cube::SetL(double _L){
+     L = _L;
+}
+
+const double& Cube::GetL()  {
+	return L;
+}
+
+int main(){
+
+	Cube cube(5);
+	cube.GetL()++;
+	return 0;
+}
+
diff --git a/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.h b/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.h
new file mode 100644
index 0000000..fb3a443
--- /dev/null
+++ b/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.h
@@ -0,0 +1,37 @@
+
+/*class GBaseShape {
+	public:
+    GBaseShape();
+virtual void  EvalVolume();
+virtual void  EvalSurface();
+double GetVolume() const;
+double GetVolume() const;
+
+	private:
+    double Volume, Surface;
+    bool IfVolumeCalculated;
+    bool IfSurfaceCalculated;
+};
+*/
+
+
+
+
+class Cube {
+  public:
+      explicit 	Cube(double _L = 0, double _W = 0, double _H = 0);
+ //     void SetAll();
+      void SetL(double _L);
+//      void SetB(double _B);
+//      void SetC(double _C);
+
+      double GetA() const;
+  private:
+      double L,W,H;
+}
+
+
+Cube::Cube(double _L = 0, double _W = 0, double _H = 0){
+   SetL(_L); 
+}
+