二叉樹(確立とアクセス)(先序、中序、後序)


二叉樹の建立(先序確立)
二叉樹のアクセス(再帰順と非再帰順)(再帰と非再帰的中間順)(再帰と非再帰順)
#include
#include
using namespace std;

struct Tree_Node ///     
{
    char data; ///       
    Tree_Node * left; ///   
    Tree_Node * right; ///   
};
///         ,        ,     ,
///               ,       ,  “#”
void createTree(Tree_Node *&t)
{
    char str;
    cin>>str;
    if(str=='#')
    {
        t=NULL;
    }
    else
    {
        t=new Tree_Node; /// t    
        t->data = str;
        createTree(t->left);
        createTree(t->right);
    }
}
void PreorderTraverse(Tree_Node * T)///    ,    
{
    if(T)
    {
        if(T->data!='#') cout<data<left);  ///     
        PreorderTraverse(T->right);  ///     
    }
}
///     ,  :
///          :           。
///            ,  ,     ,        ,           ,
///  ,      ,     
void PreorderTraverse_no_recursive(Tree_Node * T)
{
    stack s;
    Tree_Node *p = T; ///      T    ,    
    while(p || !s.empty())
    {
        if(p!=NULL)
        {
            s.push(p); ///     
            if(p->data!='#')///     
            cout<data<left; ///      
        }
        else
        {
            p = s.top(); ///     
            s.pop();
            p = p->right;///     
        }
    }
}
void InorderTraverse(Tree_Node * T)///        
{
    if(T)
    {
        InorderTraverse(T->left); ///       
        if(T->data!='#') cout<data<right); ///       
    }
}
///         ,  :
///  :T         ,              ,   ,      。
///  T  ,     ;         ,      T,  ,  T->data,
///     T    。
void InorderTraverse_recursive(Tree_Node * T)
{
    stack s;
    Tree_Node * p=T;   ///      T    ,    
    while(p || !s.empty())
    {
        if(p!=NULL)
        {
            s.push(p); ///     
            p = p->left; ///      
        }
        else
        {
            p=s.top(); ///     
            s.pop();
            if(p->data!='#') cout<data<right;///     
        }
    }
}
void PostorderTraverse(Tree_Node * T)///        
{
    if(T)
    {
        PostorderTraverse(T->left); ///     
        PostorderTraverse(T->right); ///     
        if(T->data!='#') cout<data< s;
    Tree_Node *cur;  ///       ,
    s.push(T); ///       
    while(!s.empty())
    {
        cur=s.top(); ///cur         
        if((cur->left==NULL && cur->right==NULL) || (pre!=NULL && (pre==cur->left || pre==cur->right)))
        {
            cout<data<right!=NULL) s.push(cur->right); ///          ,               
            if(cur->left!=NULL)s.push(cur->left); ///     

        }
    }
}
int main()
{
    Tree_Node * T;
    createTree(T);
    cout<