Compilare: main.cpp: In function 'int main()': main.cpp:118:13: warning: unused variable 'start' [-Wunused-variable] int start = A[px1][py1]; ^~~~~ main.cpp:119:13: warning: unused variable 'finish' [-Wunused-variable] int finish = A[px2][py2]; ^~~~~~ main.cpp: In function 'void fill1(int, int)': main.cpp:27:26: warning: iteration 8 invokes undefined behavior [-Waggressive-loop-optimizations] int ii = i + Dx[k]; ~~~~^ main.cpp:25:23: note: within this loop for (int k = 0; k <= 8; ++k) ~~^~~~ main.cpp: In function 'void fill2(int, int)': main.cpp:52:26: warning: iteration 8 invokes undefined behavior [-Waggressive-loop-optimizations] int ii = i + Dx[k]; ~~~~^ main.cpp:50:23: note: within this loop for (int k = 0; k <= 8; ++k) ~~^~~~