int AddItem(const Item * pi, Tree * ptree)
{
Node * new_node;
if(TreeIsFull(ptree))
{
fprintf(stderr,"Tree is full.\n");
return FALSE;
}
if(SeekItem(pi,ptree).child != NULL)
{
fprintf(stderr,"Attempt to add duplicate item.\n");
return FALSE;
}
new_node = MakeNode(pi);
if(new_node == NULL)
{
fprintf(stderr,"couldn't create node.\n");
return FALSE;
}
ptree->size++;
if(ptree->root == NULL)
ptree->root = new_node;
else
AddNode(new_node,ptree->root);
return TRUE;
}
int InTree(const Item * pi, const Tree * ptree)
{
if (SeekItem(pi,ptree).child == NULL)
return FALSE;
else
return TRUE;
}
//删除元素
BOOL DeleteItem(Item * pi,Tree * ptree)
{
Pair look;
look = SeekItem(pi,ptree);//在树中查找目标项目，成功则返回包含目标项目的父节点和当前节点的指针的结构体
if(look.child == NULL)
{
return FALSE;
}
if(!DeQueue(pi,look.child->queue) || look.child->queue->end == NULL)//目标节点的队列为空，或删除首元素后目标节点的队列为空
{
if(look.parent == NULL)
{
DeleteNode(&ptree->root);
}
else if(look.parent->left == look.child)
{
DeleteNode(&look.parent->left);
}
else if(look.parent->right == look.child)
{
DeleteNode(&look.parent->right);
}
ptree->size--;
}
else//当前目标节点的队列不为空，删除成功
{
puts("Delete pet's inforamtion succesfully!");
}
return TRUE;
}
//添加元素，即节点
BOOL AddItem(const Item * pi,Tree * ptree)
{
Node * new_node;//新节点
if(TreeIsFull(ptree))//判断树是否已满
{
fprintf(stderr,"Tree is full.\n");
return FALSE;
}
if(SeekItem(pi,ptree).child != NULL)//在树中查找目标项目
{
fprintf(stderr,"Attempted to add duplicate item\n");
return FALSE;
}
new_node = MakeNode(pi);//创建新节点，成功返回新节点，否则返回NULL
if(new_node == NULL)//创建失败，返回false
{
fprintf(stderr,"Couldn't create node!\n");
return FALSE;
}
//节点创建成功,向树中添加节点
ptree->size++;//树的大小加1
if(ptree->root == NULL)//如果树为空
{
ptree->root = new_node;
}
else
{
AddNode(new_node,ptree->root);//找到新节点应该添加到的位置
}
return TRUE;
}
/**
*操作：从树中删除一个项目
*操作前：pi指向一个待删除的项目，ptree指向一个已初始化过的树
*操作后：删除成功返回TRUE，否则返回FALSE
**/
int DeleteItem(const Item * pi,Tree * ptree)
{
Pair look;
look = SeekItem(pi,ptree);
if((look = SeekItem(pi,ptree)).child == NULL)
{
fprintf(stderr,"couldn't find the item in the tree.\n");
return FALSE;
}
else if(look.parent == NULL)
DeleteNode(&ptree->root);
else if(look.parent->left == look.child)
DeleteNode(&look.parent->left);
else
DeleteNode(&look.parent->right);
ptree->size--;
return TRUE;
}
bool DelItem(const Item *pi, Tree *ptree){
Pair look;
look = SeekItem(pi,ptree);
if(look.child==NULL)
return false;
if(look.parent==NULL){ //删除根项目
DeleteNode(&ptree->root);
}else if(look.parent->left==look.child){
DeleteNode(&look.parent->left);
}else
DeleteNode(&look.parent->right);
ptree->items--;
return true;
}
//添加元素，即节点
BOOL AddItem(const Item * pi,Tree * ptree)
{
Node * new_node;//新节点
Pair look;
//初始化查找到的与输入相同的节点look
/*look.parent = NULL;
look.child = NULL;*/
if(TreeIsFull(ptree))//判断树是否已满
{
fprintf(stderr,"Tree is full.\n");
return FALSE;
}
if((look = SeekItem(pi,ptree)).child != NULL)//在树中查找目标项目
{
fprintf(stderr,"Attempted to add duplicate item\n");
//如果树中已经存在相应节点，则将新同名元素添加到已有节点列表的末尾
if(QueueIsFull(look.child->queue))//判断当前节点列表是否已满
{
fprintf(stderr,"Current node's queue is full.\n");
return FALSE;
}
EnQueue(*pi,look.child->queue);
}
else
{
new_node = MakeNode(pi);//创建新节点，成功返回新节点，否则返回NULL
if(new_node == NULL)//创建失败，返回false
{
fprintf(stderr,"Couldn't create node!\n");
return FALSE;
}
//节点创建成功,向树中添加节点
ptree->size++;//树的大小加1
if(ptree->root == NULL)//如果树为空
{
ptree->root = new_node;
}
else
{
AddNode(new_node,ptree->root);//找到新节点应该添加到的位置
}
}
return TRUE;
}
bool AddItem(const Item *pi,Tree *ptree){
Node * new_node;
if(TreeIsFull(ptree)){
fprintf(stderr,"Tree is Full\n");
return false; //提前返回
}
if(SeekItem(pi,ptree).child){
fprintf(stderr,"Attempted to add duplicate item\n");
return false; //提前返回
}
new_node = MakeNode(pi); //指向新节点
if(!new_node){
fprintf(stderr,"Couldn't create node\n");
return false;
}
//成功创建一个节点
ptree->items++;
if(!ptree->root){//情况1:树为空
ptree->root = new_node; //新节点即为根节点
}else{ //情况2:树非空
AddNode(new_node,ptree->root); //把新节点添加到树中
}
return true;
}
//删除元素
BOOL DeleteItem(const Item * pi,Tree * ptree)
{
Pair look;
look = SeekItem(pi,ptree);//在树中查找目标项目，成功则返回包含目标项目的父节点和当前节点的指针的结构体
if(look.child == NULL)
{
return FALSE;
}
if(look.parent == NULL)
{
DeleteNode(&ptree->root);
}
else if(look.parent->left == look.child)
{
DeleteNode(&look.parent->left);
}
else if(look.parent->right == look.child)
{
DeleteNode(&look.parent->right);
}
ptree->size--;
return TRUE;
}
//判断目标元素是否存在于树中
BOOL InTree(const Item * pi,const Tree * ptree,void (* pfun)(Item item))
{
Pair look;
return ((look = SeekItem(pi,ptree)).child == NULL)?FALSE:TraverseQueue(look.child->queue,pfun);
}
bool InTree(const Item *pi,const Tree *ptree){
return (SeekItem(pi,ptree).child==NULL)?false:true;
}
//判断目标元素是否存在于树中
BOOL InTree(const Item * pi,const Tree * ptree)
{
return (SeekItem(pi,ptree).child == NULL)?FALSE:TRUE;
}