版权声明:本文为博主原创文章,未经博主允许不得转载,如果有错误,欢迎指正,提前感谢。 https://blog.csdn.net/Quinlan_/article/details/88076267
***二叉搜索树***的结构,首先是一个二叉树,特点是小的元素放在左边,大的元素放在右边。代码如下
#include<stdio.h>
#include<stdlib.h>
typedef struct node {
struct node *left;
struct node *right;
int data;
} Node;
typedef struct tree {
Node *root;
} Tree;
void insert(Tree *tree, int value)
{
Node *node = (Node *)malloc(sizeof(Node));
node->data = value;
node->left = NULL;
node->right = NULL;
if( tree->root == NULL )
{
tree->root = node;
}
else
{
Node *temp = tree->root;
while( temp != NULL )
{
if( temp->data < value )
{
if( temp->right == NULL )
{
temp->right = node;
return;
}
else
{
temp = temp->right;
}
}
else
{
if( temp->left == NULL )
{
temp->left = node;
return;
}
else
{
temp = temp->left;
}
}
}
}
}
void inOrder(Node *node)
{
if( node != NULL )
{
inOrder(node->left);
printf("%d\n", node->data);
inOrder(node->right);
}
}
int getHeight(Node *node)
{
if( node == NULL )
{
return 0;
}
else
{
int left_h = getHeight(node->left);
int right_h = getHeight(node->right);
int max = left_h;
if( max < right_h )
{
max = right_h;
}
return max+1;
}
}
int getMax(Node *node)
{
if( node == NULL )
{
return -1;
}
else
{
int root_m = node->data;
int left_m = getMax(node->left);
int right_m = getMax(node->right);
int max = root_m;
if( left_m > max )
{
max = left_m;
}
if( right_m > max )
{
max = right_m;
}
return max;
}
}
int main()
{
int arr[7] = {5, 1, 3, 2, 9, 6, 4};
Tree tree;
tree.root = NULL;
for(int i=0; i<7; i++)
{
insert(&tree, arr[i]);
}
inOrder(tree.root);
int height = getHeight(tree.root);
printf("height: %d\n", height);
int max = getMax(tree.root);
printf("max: %d\n", max);
return 0;
}
二叉树中,递归是个很重要的思想,用的很多。