text: Helper function for getLevel ( ) . It returns level of the data if data is present in tree , otherwise returns 0.
code: int getLevelUtil ( struct node * node , int data , int level ) { if ( node == NULL ) return 0 ; if ( node -> data == data ) return level ; int downlevel = getLevelUtil ( node -> left , data , level + 1 ) ; if ( downlevel != 0 ) return downlevel ; downlevel = getLevelUtil ( node -> right , data , level + 1 ) ; return downlevel ; }