Answer / nikhil

//TRY THIS
# include<iostream.h>
# include<conio.h>

struct NODE
{
char Info;
NODE *Left_Child;
NODE *Right_Child;
};

class Create_BT
{
public:
public: NODE *Binary_Tree (char *, int, int);
void Output(NODE *, int );
};

// Function to insert an element into tree

NODE * Create_BT :: Binary_Tree (char *List, int Lower, int Upper)
{
NODE *Node;
int Mid = (Lower + Upper)/2;
Node = new (NODE);

Node->Info = List [Mid];
if ( Lower>= Upper)
{
Node->Left_Child = NULL;
Node->Right_Child = NULL;
return (Node);
}

if (Lower <= Mid - 1)
Node->Left_Child = Binary_Tree (List, Lower, Mid - 1);
else
Node->Left_Child = NULL;
if (Mid + 1 <= Upper)
Node->Right_Child = Binary_Tree (List, Mid + 1, Upper);
else
Node->Right_Child = NULL;
return(Node);
}

// Output function

void Create_BT :: Output(NODE *T, int Level)
{
if (T)
{
Output(T->Right_Child, Level+1);
cout<<"\n";
for (int i = 0; i < Level; i++)
cout<<" ";
cout<< T->Info;
Output(T->Left_Child, Level+1);
}
}

// Function main

void main()
{
Create_BT Binary_C_Tree;
char List[100];
int Number = 0;
char Info ;
char choice;
NODE *T = new (NODE);
T = NULL;
cout<<"\n Input choice 'b' to break:";
choice = getche();
while(choice != 'b')
{
cout<<"\n Input information of the node: ";
cin>>Info;
List[Number++] = Info;
cout<<"\n Input choice 'b' to break:";
choice = getche();
}
Number --;
cout<<"\n Number of elements in the lsit is "<<Number;
T = Binary_C_Tree.Binary_Tree(List, 0, Number);
Binary_C_Tree.Output(T,1);
}

Answer / marshal

public class BinaryTree
extends AbstractTree
{
protected Object key;
protected BinaryTree left;
protected BinaryTree right;

public BinaryTree (
Object key, BinaryTree left, BinaryTree right)
{
this.key = key;
this.left = left;
this.right = right;
}

public BinaryTree ()
{ this (null, null, null); }

public BinaryTree (Object key)
{ this (key, new BinaryTree (), new BinaryTree()); }
// ...
}

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