If you want to maintain a single instance of a variable for all instances of a class, you will use static-class member variables to do it.

如果您想为一个类的所有实例维持一个变量的实例，将会用到静态类成员变量。

youdao

If you want to maintain a single instance of a variable for all instances of a class, you will use static-class member variables to do it.

如果您想为一个类的所有实例维持一个变量的实例，将会用到静态类成员变量。

youdao