link.cpp

设计一个类库

#include"link.h"

Link* Link::freelist = NULL;

void* Link::operator new(size_t){
	if( freelist == NULL )	return ::new Link;
	Link* temp = freelist;
	freelist = freelist->next;
	return temp;
}

void Link::operator delete(void* ptr){
	((Link*)ptr)->next = freelist;
	freelist = (Link*)ptr;
}