广义表建立二叉树

//#ifndef __BITREE_H
//#define __BITREE_H

#include
#include
#include
#include
#include

using namespace std;

class BiTree;

class TreeNode
{
 public:
  TreeNode():left(NULL),right(NULL){}
  TreeNode(char str):s(str),left(NULL),right(NULL){}
 public:
    friend class BiTree;
 private:
  char s;
  TreeNode *left,*right;
};

class BiTree
{
 public:
  BiTree():root(NULL){}
  BiTree(const string &str);    //建立二叉树
  ~BiTree(){
        Destroy(root);
     }
  BiTree(const BiTree& Node);
   BiTree& operator=(const BiTree& Node);
  
   bool IsEmpty(){return root==NULL?true:false;}
   void CreateTree(string &s,TreeNode* Node);
   void InsertNode(TreeNode *Node);
  
   void Destroy(TreeNode *node){
             if(node!=NULL)
       {
        Destroy(node->left);
        Destroy(node->right);
        delete node;
       }
     }
  // void OutPut(ostream& out)const;
   void dfs()const;
   void _dfs(TreeNode*node)const;
 private:
  TreeNode *root;
};

//ostream& operator<<(ostream& out,const TreeNode *Node)
//{
// Node.OutPut(out);
 
// return out;
//}

 

BiTree::BiTree(const string &str)
{
 string t(str);
 string::const_iterator iter=t.begin();
 stacks;
 int k;
 TreeNode *node;
 char c;
 
 root=NULL;
 while(iter!=t.end())
 {
  //cout<<*iter<  switch(*iter)
  {
   case '(': s.push(node);
            //cout<<"push--"<s<            k=1;
            break;
      case ')': s.pop();
               break;
      case ',': k=2;
               break;
      default:
             
              node=new TreeNode(*iter);
              //cout<s<              if(!node)
               {
                cout<<"Error "<                exit(0);
               }
              if(root==NULL)
               {
                 root=node;
                 //cout<<"root--"<s<               }
              else
              {
               if(k==1)
               {
                TreeNode *p=s.top();
                //cout<<"left:"<s<                p->left=node;
               }
               else
               {
                TreeNode *p=s.top();
                //cout<<"right:"<s<                p->right=node;
               }
              }
              break;
   }
   ++iter;
 }
}
             
/*BiTree::OutPut(ostream& out)
{
 assert(root!=NULL);
 
 out<str<<"-----";
}
*/
 
void BiTree::_dfs(TreeNode *node)const
{
 // DO WHAT U WANNA eg printf data->name or sth
 // i ve been using boost::function (callback handling) but it sux (long for compile, and slower) 
 // so i am put result to vector
 
 //result[rs]=v->data;
 //rs++;

 if(node->left!=NULL)
  _dfs(node->left);
  
  cout<s<<"----";
  
 if(node->right!=NULL)
  _dfs(node->right); 
 
}
//-------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------
void BiTree::dfs()const
{
 //rs=0;
 _dfs(root);
 
}
//-------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------

int main(int argc,char *argv)
{
 string TreeStr("A(B(E(K,L),F),C(G))");
 
 BiTree DatTree(TreeStr);
 
 DatTree.dfs();
}

//#endif

 

 

[root@localhost ]# ./bitree
K----E----L----B----F----A----G----C----[