为什么demo里 CMap 用new申请的内存在结束时 不需要用delete释放呢:Node也是
CMap *pMap = new CMap(8);
Node *pNodeA = new Node('A');
Node *pNodeB = new Node('B');
Node *pNodeC = new Node('C');
Node *pNodeD = new Node('D');
Node *pNodeE = new Node('E');
Node *pNodeF = new Node('F');
Node *pNodeG = new Node('G');
Node *pNodeH = new Node('H');