diff --git a/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/Shapes.h b/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/Shapes.h
new file mode 100644
index 0000000..4d22884
--- /dev/null
+++ b/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/Shapes.h
@@ -0,0 +1,46 @@
+#include <iostream>
+#include <array>
+#include <vector>
+class Cube {
+ 
+ public:
+ Cube(){}
+ Cube(auto _A, auto _B, auto _C): A(_A), B(_B), C(_C){
+ }
+public:
+double EvalVolume(){
+    return A * B * C;
+}
+std::array<double, 3> GetAll(){
+    auto tmp {std::array<double, 3>()};
+    tmp[0]=A;
+    tmp[1]=B;
+    tmp[2]=C;
+    return tmp;
+}
+void SetAll(auto _A, auto _B, auto _C){
+   A=_A;
+   B=_B;
+   C=_C;
+}
+void SetA(double x){
+   A=x;
+}
+void SetB(double x){
+   B=x;
+}
+void SetC(double x){
+   C=x;
+}
+const double& GetA(){
+   return A;
+}
+const double& GetB(){
+   return B;
+}
+const double& GetC(){
+   return C;
+}
+private:
+  double A, B, C, Volume;
+};
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diff --git a/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/a.out b/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/a.out
new file mode 100755
index 0000000..c5c5505
Binary files /dev/null and b/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/a.out differ
diff --git a/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/main.cpp b/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/main.cpp
new file mode 100644
index 0000000..06513f6
--- /dev/null
+++ b/CPlusPlus20ForProgrammers-master/examples/Shapes/dd/main.cpp
@@ -0,0 +1,17 @@
+#include "Shapes.h"
+
+int main(){
+    Cube c;
+    Cube c2(1,4,6);
+
+    std::vector<Cube> Cubes;
+    Cubes.push_back(c);
+    Cubes.push_back(c2);
+    Cubes.push_back(Cube(6,8,9));
+
+    for ( auto x : Cubes){
+       std::cout << x.EvalVolume() << "\n";
+    }
+    
+    return 0;
+}
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