#include <iostream>#include <new>using namespace std;class CSaveCurHandler //用于管理new_handler,保存原始的new_handler,在new成功结束后还原.{private:	new_handler cur;public:	CSaveCurHandler(new_handler nh) :cur(nh){}	~CSaveCurHandler()	{		set_new_handler(cur);	}};template<class T>class CWidget{private:	static new_handler cur_handler;public:	static void set_handler(new_handler nh)	{		cur_handler = nh;	}	static void *operator new(size_t size) throw(std::bad_alloc)	{		CSaveCurHandler sch(set_new_handler(cur_handler)); //将原始的保存至CSaveCurHandler对象中		return ::operator new(size);                       //,调用系统原始的new,返回后自动还原new_handler	}};void outMen(){	cout << "内存不够";}template<class T>new_handler CWidget<T>::cur_handler = outMen;class MY : public CWidget<MY>{private:	char buf[1025 * 1024 * 1024];};int main(){	MY::set_handler(outMen);	while (1)		MY *p = new MY;	cin.get();	return 0;}