Programming exercise txt file

Exercise.txt

@@ -0,0 +1,54 @@
+OldCoffeeMachine.cpp
+#include <iostream>
+class OldCoffeeMachine {
+    public:
+        void selectA(){
+            std::cout<<"Coffee flavor A from old machine"<<"\n";
+        }
+        void selectB(){
+            std::cout<<"Coffee flavor B from old machine"<<"\n";
+        }
+};
+
+CoffeeMachineInterface.cpp
+#include <iostream>
+class CoffeeMachineInterface {
+    public:
+        void chooseFirstSelection(){
+            std::cout<<"Coffee flavor A from new machine"<<"\n";
+        }
+        void chooseSecondSelection(){
+            std::cout<<"Coffee flavor B from new machine"<<"\n";
+        }
+};
+
+CoffeeTouchscreenAdapter.cpp
+class CoffeeTouchscreenAdapter : public CoffeeMachineInterface {
+    private:
+        OldCoffeeMachine* oldVendingMachine;
+    public:
+        CoffeeTouchscreenAdapter(OldCoffeeMachine* oldMachine){
+            oldVendingMachine = oldMachine;
+        }
+        void chooseFirstSelection(){
+            oldVendingMachine->selectA();
+        }
+        void chooseSecondSelection(){
+            oldVendingMachine->selectB();
+        }
+};
+
+main.cpp
+#include <iostream>
+int main(){
+    OldCoffeeMachine* oldVendingMachine = new OldCoffeeMachine;
+    CoffeeMachineInterface* newMachine = new CoffeeMachineInterface;
+    CoffeeTouchscreenAdapter* oldMachine = new CoffeeTouchscreenAdapter(oldVendingMachine);
+
+    newMachine->chooseFirstSelection();
+    newMachine->chooseSecondSelection();
+    oldMachine->chooseFirstSelection();
+    oldMachine->chooseSecondSelection();
+
+    return 0;
+}