sum_of_leaf_Nodes.cpp

int sumLeaf(Node* root)
{
   if(root==NULL){
       return 0; 
   }
   if(root->left==NULL && root->right==NULL){
       return root->data; 
       
   }
   else{
       return   sumLeaf(root->left) + sumLeaf(root->right); 
       
   }