Compilare: user.cpp: In function ‘void read()’: user.cpp:24:13: warning: unused variable ‘k’ [-Wunused-variable] int k ,x , y; ^ user.cpp:24:16: warning: unused variable ‘x’ [-Wunused-variable] int k ,x , y; ^ user.cpp:24:20: warning: unused variable ‘y’ [-Wunused-variable] int k ,x , y; ^ user.cpp: In function ‘bool ok(int, int, int)’: user.cpp:45:5: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘void lee(int, int)’: user.cpp:60:45: warning: iteration 4u invokes undefined behavior [-Waggressive-loop-optimizations] i_urmator = i + dx[k]; ^ user.cpp:58:17: note: containing loop for( int k=0; k < 8; k++ ) ^