Let's see an example of where some private variables will be useful. Consider this subroutine.

如下示例展示私有变量在哪里会很有用。

youdao

Instead, I create the class and quickly type the private variables I'll be using in the class, like those in Listing 1.

相反，我创建类并快速在类中输入私有变量，如清单1所示。

youdao

Private function can access private variables.

这说明私有函数能访问私有变量。

youdao

Private function can access private variables.

这说明私有函数能访问私有变量。

youdao