Implement 2 destructors.

Signed-off-by: Abdulkadir Furkan Şanlı <me@abdulocra.cy>

bank.h

@@ -42,6 +42,7 @@ public:
   bool fire (Employee &x);
   bool openAccount (Client &x);
   bool closeAccount (Client &x);
+  void closeAccountNoBail (Client &x);
   // TODO: implement loans, for now there is placeholder loan() and unloan(),
   // in order to simulate loaning and test bailout mechanism.
 
@@ -85,6 +86,7 @@ class Employee
 public:
   std::string name;
   Employee (std::string x) : name (x){};
+  ~Employee ();
 
 private:
   Bank *employer = nullptr;
@@ -97,6 +99,7 @@ class Client
 public:
   std::string id;
   Client (std::string x) : id (x), underMattress (0){};
+  ~Client ();
   double earn (const double amount); // Earn money.
   double getMattress ();