在面向對象編程中，有一些關鍵概念是非常重要的。其中一個概念是重寫（override），這指的是子類可以重寫父類的方法。通過重寫，子類可以根據自己的需求來重新定義父類的方法。
另一個重要概念是虛函數（virtual），這允許在父類中定義一個虛函數，並在子類中重寫這個虛函數。這樣，當調用虛函數時，編譯器將根據對象的實際類型來確定要調用的方法。
運算符重載（operator overloading）也是面向對象編程中的一個重要概念。通過運算符重載，可以定義對象如何對應到運算符。通過重載運算符，我們可以自定義對象之間的運算行為。
在面向對象編程中，類（class）是一個非常常見的概念。一個類定義了一個對象的屬性和行為。在一個類中，成員可以被聲明為公共的（public），這意味著它們可以被外部代碼訪問。
這些概念在面向對象編程中扮演著重要角色，對於理解和設計複雜的代碼結構非常有幫助。
Keywords: override, virtual, operator, class, public
Title: Important Concepts in Object-Oriented Programming
Article:
In object-oriented programming, there are some key concepts that are very important. One of these concepts is override, which refers to the ability of a subclass to override a method from its superclass. Through overriding, a subclass can redefine the method from the superclass according to its own needs.
Another important concept is virtual functions, which allows for the definition of a virtual function in a superclass, and then this virtual function can be overridden in subclasses. This way, when calling a virtual function, the compiler determines which method to call based on the actual type of the object.
Operator overloading is also an important concept in object-oriented programming. By overloading operators, we can define how objects correspond to operators. Through overloading operators, we can customize the behavior of operations between objects.
In object-oriented programming, a class is a very common concept. A class defines the properties and behaviors of an object. Within a class, members can be declared as public, meaning they can be accessed by external code.
These concepts play important roles in object-oriented programming, and are helpful for understanding and designing complex code structures.
（本文章僅就題目要求進行撰寫，不代表任何觀點或意見）
