Pointers to stack variables are often used
in C to allow functions to modify variables in other stack frames, essentially passing by reference. By
dereferencing the pointer, the function can change the memory that represents the variable even though
that variable isn’t in the current stack frame. This is less common in C++ because C++ has a better mechanism,
called references, which is covered below.

[此贴子已经被作者于2006-11-3 9:36:00编辑过]

不好意思!
好象我帮不上忙!

指向堆栈变量的指针经常被用到，在C里面允许以函数以堆栈的结构（框架）的形式更改变量，也就是参数传递。通过解除指针的参照，函数可以改变象征变量的内存即使这个变量不存在于当前的堆栈（框架）中。。。。。


大概是这个意思吧，不知道错了没？