树的建立

#include <iostream.h>
struct node
{
   int data;
   struct node *lchild,*rchild;
};

void CreateBiTree()

{        struct node *root;

     for(int i=0;i<8;i++)
     {
    switch(i)
     {
     case 0:
         root=new node ;
         root->data=1;
         root->lchild=NULL;
         root->rchild=NULL;
         break;
     case 1:
        root->lchild=new node ;
        root->lchild->data=2;
        root->lchild->lchild=NULL;
        root->lchild->rchild=NULL;
        break;
     case 2:
         root->rchild=new node;
         root->rchild->data=3;
         root->rchild->lchild=NULL;
         root->rchild->rchild=NULL;
         break;

     case 3:
         root->lchild->lchild=new node;
         root->lchild->lchild->data=4;
         root->lchild->lchild->lchild=NULL;
         root->lchild->lchild->rchild=NULL;
        break;
     case 4:
         root->lchild->rchild=new node;
         root->lchild->rchild->data=5;
         root->lchild->rchild->lchild=NULL;
         root->lchild->rchild->rchild=NULL;
         break;
     case 5:
         root->rchild->lchild=new node;
         root->rchild->lchild->data=6;
         root->rchild->lchild->lchild=NULL;
         root->rchild->lchild->rchild=NULL;
         break;
     case 6:
         root->lchild->rchild->lchild=new node;
         root->lchild->rchild->lchild->data=7;
         root->lchild->rchild->lchild->lchild=NULL;
         root->lchild->rchild->lchild->rchild=NULL;
         break;
     case 7:
         root->lchild->rchild->rchild=new node;
         root->lchild->rchild->rchild->data=8;
         root->lchild->rchild->rchild->lchild=NULL;
         root->lchild->rchild->rchild->rchild=NULL;
         break;
     }
}
}

void main()
{  


     CreateBiTree();
   
}

谢谢了，我改好了程序了。我是新手，望以后多多帮助