diff --git a/CPlusPlus20ForProgrammers-master/examples/shapes/a.out b/CPlusPlus20ForProgrammers-master/examples/shapes/a.out
index 0d19890..30deedd 100755
Binary files a/CPlusPlus20ForProgrammers-master/examples/shapes/a.out 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
index 36b8e4e..fd94c2a 100644
--- a/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.cpp
+++ b/CPlusPlus20ForProgrammers-master/examples/shapes/shapes.cpp
@@ -1,4 +1,5 @@
-
+#include <iostream>
+#include <vector>
 /*class GBaseShape {
 	public:
     GBaseShape();
@@ -19,20 +20,38 @@ double GetVolume() const;
 
 class Cube {
   public:
-      explicit 	Cube(double _L = 0, double _W = 0, double _H = 0);
+      explicit 	Cube(double _L = 0, double _W = 0, double _H = 0, long int N = 0);
+    ~Cube(){
+     //  std::cout << "Destructor was run!\n";
+     delete Data;
+    }
  //     void SetAll();
       void SetL(double _L);
+
 //      void SetB(double _B);
 //      void SetC(double _C);
-
+      
       const double& GetL();
+      double& operator[] (int i){
+           if(i==1)
+            return L;
+           if (i==2)
+             return W;
+           if (i==3)
+             return H;
+        return tmp;
+      }
   private:
       double L,W,H;
+      double* Data;
+      double tmp;
 };
 
 
-Cube::Cube(double _L , double _W , double _H ){
+Cube::Cube(double _L , double _W , double _H, long int N  ){
    SetL(_L); 
+   Data = new double[N];
+   //std::cout << "Constructor was run!\n";
 }
 
 void Cube::SetL(double _L){
@@ -44,9 +63,18 @@ const double& Cube::GetL()  {
 }
 
 int main(){
+    
+	Cube cube(5,6,10);
+    
+	//cube.GetL()++;
+   // for (int i{0}; i<10000; i++)
+   // {
+   //     auto c = Cube(0,0,0,1000000);
+   // }
+    //for (int i{0}; i<10000000000; i++)
+    //     std::cout << "!!!\n";
 
-	Cube cube(5);
-	cube.GetL()++;
+      std::cout << cube[1] << "\n";
 	return 0;
 }