Variably modified array at file scope

遇到这个问题好几次了，记录下：

const int N = 100005;int stack1[N]；

错误信息：

error: variably modified 'stack1' at file scope

错误原因：

The reason for this warning is that const in c doesn't mean constant. It means "read only". So the value is stored at a memory address and could potentially be changed by machine code.

解决办法：

#define N  100005int stack1[N]；