void inOrderTraverse(TreeNode* root){
if(root->left)
inOrderTraverse(root->left);
arr.push_back(root->val);
if(root->right)
inOrderTraverse(root->right);
}
void inOrderTraverse(const Node& n, int *currentMode, int *modeCount, int* potentialMode, int *potentialCount)
{
if (n.left != nullptr)
inOrderTraverse(*(n.left), currentMode, modeCount, potentialMode, potentialCount);
if (*potentialCount > *modeCount)
{
*currentMode = *potentialMode;
*modeCount = *potentialCount;
}
else if (*potentialMode != n.value)
{
*potentialMode = n.value;
*potentialCount = 1;
}
else
{
(*potentialCount)++;
}
if (n.right != nullptr)
inOrderTraverse(*(n.right), currentMode, modeCount, potentialMode, potentialCount);
}
void inOrderTraverse(struct BSTNode* root){
if(root == NULL)
return;
inOrderTraverse(root->left);
printf("Node value : %d\n",root->value);
inOrderTraverse(root->right);
return;
}
/**
* 前序遍历
*/
void inOrderTraverse(BiTree T)
{
if(T==NULL)
return;
inOrderTraverse(T->lchild);
printf("%c ", T->data);
inOrderTraverse(T->rchild);
}
//中序递归遍历T，对每个结点调用函数visit一次且仅一次
void inOrderTraverse(BiTreeLink T,int(*visit)(TElemType)){
//T不空
if(T){
inOrderTraverse(T->lchild,visit);//再中序遍历左子树
//再访问根结点
(*visit)(T->data);//visit指向函数的入口地址
inOrderTraverse(T->rchild,visit);//最后中序遍历右子树
}
}
/* Left Subtree -> Root -> Right Sub-tree */
void inOrderTraverse(struct node *root)
{
if (root == NULL)
return;
inOrderTraverse(root->left);
printf(" [%d] ", root->val);
inOrderTraverse(root->right);
}
void inOrderTraverse(Node* root)
{
if (root == NULL)
return;
inOrderTraverse(root->left);
printf("%d\n", root->value);
inOrderTraverse(root->right);
}
void inOrderTraversalLCRSTree(Tree *tree, void *key, ProcessItem processItem, compareTo compare){
List *list = NULL;
inOrderTraverse(tree->root, processItem, list, compare);
}
int main()
{
BiTree T;
//printf("input former sequence traversal, like:\nab#d##c##\n");
createBiTree(&T);
inOrderTraverse(T);
printf("\n");
return 0;
}
bool isValidBST(TreeNode* root){
if (root == NULL)
return true;
arr.clear();
inOrderTraverse(root);
if (arr.size() == 1) return true;
for(int i = 0; i < arr.size() - 1; i++){
if(arr[i] >= arr[i+1]) return false;
}
return true;
}
int findModeBST(const Node& root)
{
//assuming root is always a valid Node pointer
int currentMode = root.value;
int modeCount = 1;
int potentialMode;
int potentialCount;
inOrderTraverse(root, ¤tMode, &modeCount, &potentialMode, &potentialCount);
return currentMode;
}
int main()
{
printf("Please input the values of nodes seperated by space with -1 denotes termination\n");
BTree root=(BTree)malloc(sizeof(BiTNode));
root->left=NULL;
createSortedTree(&(root->left));
printf("create done! print\n");
printf("in order sequence:\n");
inOrderTraverse(root->left);
printf("\npost order sequence(1):\n");
postOrderTraverse(root->left);
printf("\npost order sequence(2):\n");
postOrderTraverse2(root->left);
printf("\n The level sequenece is:\n");
levelTraverse(root->left);
printf("\nlink view:\n");
linkTraverse(tree2link(root->left));
}
int main()
{
int nodes;
printf("Your first BST...\n");
printf("Enter number of nodes..");
scanf("%d", &nodes);
int num = 0;
int val;
/* Initialize tree root node */
struct node *root = NULL;
/* TCreation of BST */
for (; num <nodes; num++) {
int val;
scanf("%d", &val);
root = EnterNode(root, val);
}
/* Traversal */
printf("\nNow print PreOrder Traversal..");
preOrderTraverse(root);
printf("\nNow print PostOrder Traversal..");
postOrderTraverse(root);
printf("\nNow print InOrder Traversal..");
inOrderTraverse(root);
/* Deletion of a node */
printf("\n Now we want to delete a node in BST..\n");
printf("Enter value of node to be deleted...\n");
scanf("%d", &val);
// DeleteNodeInBST(root, val);
/* Finding a node */
printf("\n Now we want to Find a node in BST..\n");
printf("Enter value of nodes to be found...\n");
scanf("%d", &val);
FindNodeInBST(root, val);
}
int main()
{
Node* root = NULL;
constructBST(root, 3);
constructBST(root, 2);
constructBST(root, 1);
constructBST(root, 4);
constructBST(root, 0);
printf("in order traverse the BST:\n");
inOrderTraverse(root);
printf("------------------\n");
int maxDep = maxDepth(root);
printf("maxDep : %d\n", maxDep);
printf("------------------\n");
getLongest(root);
printf("longest : %d\n", longest);
return 0;
}
void main(){
int i;
BiTreeLink T,p,c;
TElemType e1,e2;
initBiTree(&T);
//判断数是否为空，求树的深度
printf("\nInit a Binary Tree!\nThe tree is empty or not?%d(1:yes 0:no);The tree depth=%d\n",biTreeEmpty(T),biTreeDepth(T));
//寻找根结点
e1 = root(T);
if(e1!=Nil)
printf("\nThe root of the Binary Tree is:'%c'\n",e1);
else
printf("\nThe Binary Tres has no root\n");
//请先序输入二叉树(如:ab三个空格表示a为根结点,b为左子树的二叉树)
printf("\nBuild a Binary Tree!like abc@@de@g@@f@@hi@j@@k@@,@stand for space\n");
createBiTree(&T);
//判断数是否为空，求树的深度
printf("\nThe tree is empty or not?%d(1:yes 0:no);The tree depth=%d\n",biTreeEmpty(T),biTreeDepth(T));
//寻找根结点
e1 = root(T);
if(e1!=Nil)
printf("\nThe root of the Binary Tree is:'%c'\n",e1);
else
printf("\nThe Binary Tres has no root\n");
//层序递归遍历(Of sequence to traverse the binary tree)
printf("\nlevel order Traverse the Binary Tree:\n");
levelOrderTraverse(T,visitT);
//先序遍历
printf("\npreOrder Traverse the Binary Tree:\n");
preOrderTraverse(T,visitT);
//中序递归遍历
printf("\n\ninOrder recursion Traverse the Binary Tree:\n");
inOrderTraverse(T,visitT);
//中序非递归遍历1
printf("\ninOrder non-recursion Traverse the Binary Tree 1:\n");
inOrderTraverse1(T,visitT);
//中序非递归遍历2
printf("inOrder non-recursion Traverse the Binary Tree 2:\n");
inOrderTraverse2(T,visitT);
//后序递归遍历
printf("\npostOrder recursion Traverse the Binary Tree:\n");
postOrderTraverse(T,visitT);
//修改结点
e1 = 'd';//原值
//scanf("%c",&e1);
p = point(T,e1);//获得e1对应的指针
//获得对应结点的值
printf("\n\nKnow the previous vaule is:'%c'\nEnter the new vlaue:\n",value(p));
e2 = 'r';//新结点的值
//scanf("%c",&e2);
assign(p,e2);//赋新值
//先序遍历
printf("preOrder Traverse the Binary Tree:\n");
preOrderTraverse(T,visitT);
//寻找双亲
e1 = parent(T,e2);
if(e1!=Nil) printf("\n\nthe parent of '%c' is : '%c'\n",e2,e1);
else printf("'%c' has no parent\n",e2);
//寻找左孩子
e1 = leftChild(T,e2);
if(e1!=Nil) printf("\nthe left child of '%c' is : '%c'\n",e2,e1);
else printf("'%c' has no left child\n",e2);
//寻找右孩子
e1 = rightChild(T,e2);
if(e1!=Nil) printf("\nthe right child of '%c' is : '%c'\n",e2,e1);
else printf("'%c' has no right child\n",e2);
//寻找左兄弟
e1 = leftSibling(T,e2);
if(e1!=Nil) printf("\nthe left sibling of '%c' is : '%c'\n",e2,e1);
else printf("'%c' has no left sibling\n",e2);
//寻找右兄弟
e1 = rightSibling(T,e2);
if(e1!=Nil) printf("\nthe right sibiling of '%c' is : '%c'\n",e2,e1);
else printf("'%c' has no right sibiling\n",e2);
//初始化需要插入的树
initBiTree(&c);//s=jk //这里有三个空格
printf("\nBuild the Binary Tree c which has no right child:\n");
c = (BiTreeLink)malloc(sizeof(BiTNode));
p = (BiTreeLink)malloc(sizeof(BiTNode));
c->lchild = p;
c->rchild = NULL;
c->data = 'm';
p->lchild = p->rchild = NULL;
p->data = 'n';
//createBiTree(&c);
//先序递归遍历
printf("\npreOrder Traverse the Binary Tree:\n");
preOrderTraverse(c,visitT);
//树s插到树T中，请输入树T中树s的双亲结点 s为左(0)或右(1)子树:
printf("\n\nInsert the Tree s to the Tree T,enter the parent of the Tree c in the Tree T,left Tree(0) and right Tree(1):\n");
e1= 'b';i = 0;//将子树c作为结点'b'的左子树
//scanf("%c%d",&e1,&i);
p = point(T,e1);//p是T中树c的双亲结点指针
insertChild(p,i,c);
//先序递归遍历
printf("\npreOrder Traverse the Binary Tree:\n");
preOrderTraverse(T,visitT);
// 删除子树,请输入待删除子树根结点 左(0)或右(1)子树
printf("\n\nDelete the Tree s,enter the root of the deleting Child Tree, left Tree(0) and right Tree(1):\n");
e1= 'b';i = 1;//删除父结点为'b'的右子树
p = point(T,e1);//p是T中树c的双亲结点指针
deleteChild(p,i);
//先序递归遍历
printf("\npreOrder Traverse the Binary Tree:\n");
preOrderTraverse(T,visitT);
//清空子树
clearBiTree(&T);
printf("\n\nEmpty the Binary Tree?%d(1:yes 0:no)\nThe tree depth=%d\n",biTreeEmpty(T),biTreeDepth(T));
//寻找根结点
e1 = root(T);
if(e1!=Nil)
printf("\nThe root of the Binary Tree is:'%c'\n",e1);
else
printf("\nThe Binary Tres has no root\n");
}