Tree: Preorder Traversal

PROBLEM :

Complete the preOrder function in your editor below, which has  parameter: a pointer to the root of a binary tree. It must print the values in the tree's preorder traversal as a single line of space-separated values.

Input Format

Our hidden tester code passes the root node of a binary tree to your preOrder function.

Output Format

Print the tree's preorder traversal as a single line of space-separated values.

Sample Input

4
       /   \
     2     7
    / \   /
  1   3 6

output : 4 2 1 3 7 6
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SIMPLE c++ IMPLEMENTATION :
--------------------------------------------------------------------------------

/* you only have to complete the function given below.
Node is defined as

struct node
{
    int data;
    node* left;
    node* right;
};

*/

void preOrder(node *root) {
 
    if(root==NULL)
        return ;
 
    cout<<root->data<<" " ;
    preOrder(root->left) ;
    preOrder(root->right) ;

}


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