Compilare: user.cpp: In member function ‘void AVL::balance(AVL::node*&)’: user.cpp:95:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if( height( root->right ) - height( root->left ) > ALLOWED_IMBALANCE )//right-x case ^ user.cpp: In function ‘int main()’: user.cpp:173:13: warning: unused variable ‘op’ [-Wunused-variable] int n,x,op,nr,nr2,j=0; ^ user.cpp:173:16: warning: unused variable ‘nr’ [-Wunused-variable] int n,x,op,nr,nr2,j=0; ^ user.cpp:173:19: warning: unused variable ‘nr2’ [-Wunused-variable] int n,x,op,nr,nr2,j=0; ^ user.cpp:173:23: warning: unused variable ‘j’ [-Wunused-variable] int n,x,op,nr,nr2,j=0; ^