char value;};struct nodelist {/* 链表结构用于非递归前序遍历该二叉树 */ struct treenode *node;struct nodelist *next;};char *LRD1 = "DEBFCA"; /* 测试数据,后序 */ char *LDR1 = "DBEAFC"; /* 测试数据,中序 */ void dlrtree(struct treenode *root) /* 非递归前序遍历...