说明：  采用C这样的高级语言，其实可以不用关心变量在存储器空间中是如何具体分配的。但如果了解如何分配，对编程还是有好处的，尤其是在调试时。 例如下面的程序定义了全局变量数组buffer和一个局部变量i，在RAM中如何分配的呢？
(High-level language such as C, can actually do not care about the variables in the memory space is allocated specific. But if you understand how to distribute programming or beneficial, especially in debugging. For example, the following program defines a global variable array buffer and a local variable i in RAM and how to allocate it?)