Trees -- Find sum at level K

#1

why my code is not working properly plz explain also how to correct it here is the link,

#2

Ayush, you need to edit your buildtree function, plz use the recursive approach for that, as
if(n==0)
return root ;
if(n==1)
root->left = buildTreeGeneric(root->left);
return root ;
else
root->left = buildTreeGeneric(root->left);
root->right = buildTreeGeneric(root->right) ;
return root ;

Try using this approach for building the tree.