二叉树的基本算法

#include//二叉树的建立，遍历算法（非递归），递归在其他代码中，深度算法，叶子节点个数算法。
#include
#include
using namespace std;
typedef struct tree
{
    char data;
	struct tree *lchild,*rchild;
}tree,*bitree;
typedef struct post
{
	bitree bit;
	char tag;
}post,*postorder;
int createtree(bitree &T)
{
	char data;
	cin>>data;
	if(data==&＃39;,&＃39;) {T=NULL;}
	else
	{
		T=new tree;
		T->data=data;
		createtree(T->lchild);
		createtree(T->rchild);
	}
	return 0;
}
void preorder(bitree T)
{
	stackstack;
	bitree p=T;
	while(p||!stack.empty())
	{
        if(p!=NULL)
		{
			stack.push(p);
			cout<data;
			p=p->lchild;
		}
		else
		{
			p=stack.top();
			stack.pop();
			p=p->rchild;
		}
	}
}
void inorder(bitree T)
{
	stackstack;
	bitree p=T;
	while(p||!stack.empty())
	{
		if(p!=NULL)
		{
			stack.push(p);
			p=p->lchild;
		}
		else
		{
			p=stack.top();
			cout<data;
			stack.pop();
			p=p->rchild;
		}
	}
}
void postordertree(bitree T)
{
	stackstack;
	bitree p=T;
	postorder bt;
	while(p||!stack.empty())
	{
		while(p!=NULL)
		{
			bt=new post;
			bt->bit=p;
			bt->tag=&＃39;L&＃39;;
			stack.push(bt);
			p=p->lchild;
		}
		while(!stack.empty() && (stack.top())->tag==&＃39;R&＃39;)
		{
			bt=stack.top();
			stack.pop();
			cout<bit->data;
		}
		if(!stack.empty())
		{
			bt=stack.top();
			bt->tag=&＃39;R&＃39;;
			p=bt->bit;
			p=p->rchild; 
		}
	}
}
void levelorder(bitree T)
{
     queuequeue;
	 bitree p=T;
	 queue.push(p);
	 while(!queue.empty())
	 {
		 p=queue.front();
         cout<data;
		 queue.pop();
		 if(p->lchild!=NULL)
			 queue.push(p->lchild);
		 if(p->rchild!=NULL)
			 queue.push(p->rchild);
	 }
}		 
int high_count(bitree T)
{
	int left,right,high;
	if(!T) {return 0;}
    left=high_count(T->lchild);
	right=high_count(T->rchild);
	high=(left>right?left:right)+1;
	return high;
}
int yezi_count(bitree T,int &n)
{
	if(T)
	{
		if(T->lchild==NULL && T->rchild==NULL)
			n++;
		yezi_count(T->lchild,n);
		yezi_count(T->rchild,n);
	}
	return n;
}
int main()
{
	int s=0;
	bitree T;
	createtree(T);
	preorder(T);
	cout<<"\n";
	inorder(T);
	cout<<"\n";
	postordertree(T);
	cout<<"\n";
	levelorder(T);
	cout<<"\n";
	int h=high_count(T);
	cout<