What is the function of the operator in C++?

In C++, operators are used to perform specific operations within an expression. They allow us to perform various arithmetic, logical, comparison, and bitwise operations on data. C++ provides a range of predefined operators, such as addition operator (+), subtraction operator (-), multiplication operator (*), division operator (/), as well as some special operators, such as logical AND (&&), logical OR (||), equality operator (==), and so on.

通过重新定义操作符，我们可以自定义类的操作行为，以便在自定义类型的对象上使用操作符。这样可以让自定义类型的对象进行操作，就像基本类型对象一样。操作符的重新定义可以大大提升代码的可读性和灵活性。

In conclusion, the operator in C++ is used to define and perform various operation, providing a convenient and flexible way to handle different types of data.