Solved: 20 - Classes and Objects

modules/06_oop_basics/include/classes_and_objects.hpp

@@ -11,8 +11,8 @@ public:
     [[nodiscard]] auto owner() const -> const std::string&;
     [[nodiscard]] auto balance() const -> double;
 
-    void deposit(double amount);
-    auto withdraw(double amount) -> bool;
+    void deposit(double amount) pre(amount > 0);
+    auto withdraw(double amount) -> bool pre(amount > 0);
 
 private:
     std::string owner_;