在現代程式設計中，物件導向程式設計是一個常見的概念。在物件導向程式設計中，我們常常使用override來重寫父類的函數。通過使用override，我們可以在子類中提供一個新的實現，以替換父類中已經存在的函數。
在物件導向程式設計中，我們還會遇到虛函數的概念。通過使用virtual，我們可以聲明一個函數是虛函數，從而允許子類重寫這個函數。這樣的設計使得我們可以在運行時動態地根據對象的實際類型來調用對應的函數。
另外，在物件導向程式設計中，operator也是一個重要的關鍵字。通過使用運算符重載，我們可以定義對象之間的操作。這樣可以使得我們的程式碼更加直觀和易讀。
在程式設計中，const和static這兩個關鍵字也是常見的用法。const用來聲明變量是常量，一旦被賦值後就無法修改。static則用來聲明一個變量或函數是靜態的，其生命週期與程式的運行周期相同。
Keywords: override, virtual, operator, const, static
Title: Keywords in Object-Oriented Programming
Article: In modern programming, object-oriented programming is a common concept. In object-oriented programming, we often use override to rewrite functions from the parent class. By using override, we can provide a new implementation in the subclass to replace the existing function in the parent class.
In object-oriented programming, we also encounter the concept of virtual functions. By using virtual, we can declare a function as virtual, allowing subclasses to override this function. This design allows us to dynamically invoke the corresponding function based on the actual type of the object at runtime.
Furthermore, in object-oriented programming, operator is also an important keyword. By using operator overloading, we can define operations between objects, making our code more intuitive and readable.
In programming, const and static are also common keywords. const is used to declare a variable as a constant, making it immutable once assigned. static is used to declare a variable or function as static, with a lifetime the same as the program's execution cycle.
（本文章僅就題目要求進行撰寫，不代表任何觀點或意見）
