Compilare: user.cpp: In function ‘int lee(int, int)’: user.cpp:48:16: warning: unused variable ‘xx’ [-Wunused-variable] int k, ok, xx, yy, h, i, j, l, nr; ^ user.cpp:48:20: warning: unused variable ‘yy’ [-Wunused-variable] int k, ok, xx, yy, h, i, j, l, nr; ^ user.cpp:48:33: warning: unused variable ‘l’ [-Wunused-variable] int k, ok, xx, yy, h, i, j, l, nr; ^ user.cpp:48:36: warning: unused variable ‘nr’ [-Wunused-variable] int k, ok, xx, yy, h, i, j, l, nr; ^ user.cpp:70:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^