Compilare: user.cpp: In function ‘void DepthFirstSearch(int)’: user.cpp:25:10: warning: unused variable ‘j’ [-Wunused-variable] int i , j ; ^ user.cpp:27:7: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] bool ok = false; ^ user.cpp: In function ‘int main()’: user.cpp:51:10: warning: unused variable ‘j’ [-Wunused-variable] int i , j , x , y , start_Node; ^ user.cpp:51:22: warning: ‘start_Node’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i , j , x , y , start_Node; ^