学步园

#include <iostream>
using namespace std;

typedef struct Node
{
	int data;
	struct Node* lchild;
	struct Node* rchild;
}Node, *pNode;

bool used[100];

void minHeightTree(pNode head, int* src, int start, int end)
{
	if (start == end)
	{
		return;
	}
	int mid = (start + end) / 2;
	pNode p = new Node;
	if (used[mid] && mid < end && used[mid+1] < end)
	{
		mid++;
	}
	if (used[mid])
	{
		return;
	}
	p->data = src[mid];
	p->lchild = p->rchild = NULL;
	used[mid] = true;
	if (!head->lchild && p->data < head->data)
	{
		head->lchild = p;
	}	
	else if(!head->rchild && p->data > head->data)
	{
		head->rchild = p;
	}
	minHeightTree(p, src, start, mid);
	minHeightTree(p, src, mid, end);
}	

void printTree(pNode head)
{
	if (!head)
	{
		return;
	}
	cout<<head->data<<endl;
	if (head->lchild)
	{
		cout<<head->data<<"lchild:";
		printTree(head->lchild);
	}
	if (head->rchild)
	{
		cout<<head->data<<"rchild:";
		printTree(head->rchild);
	}
}

int main(void)
{
	int src[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
	int len = sizeof(src) / sizeof(int);
	pNode head = new Node;
	head->lchild = head->rchild = NULL;
	memset(used, false, sizeof(used));
	minHeightTree(head, src, 0, len - 1);
	printTree(head);

	return 0;
}