To keep track of which variables can be used where, it is sometimes useful to draw a stack diagram.

要追踪一个变量能在哪些位置使用，咱们就可以画个图表来实现，这种图表叫做栈图。

youdao

To keep track of which variables can be used where, it is sometimes useful to draw a stack diagram.

要追踪一个变量能在哪些位置使用，咱们就可以画个图表来实现，这种图表叫做栈图。

youdao