几个宏函数

#define Max(a,b)  (((a) > (b)) ? (a) : (b))

#define Min(a,b)  (((a) < (b)) ? (a) : (b)) 

#define SAFE_DELETE_ARRAY(p)  { if(p) { delete[] (p);   (p)=NULL; } }

#define SAFE_DELETE(p) { if(p) { delete (p);     (p)=NULL; } }