Compilare: user.cpp: In function ‘int main()’: user.cpp:144:68: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << x - 1 << ' ' << y - 1 << ' ' << x - 1 + dx << ' ' << y - 1 + dy << '\n'; ^ user.cpp:144:47: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << x - 1 << ' ' << y - 1 << ' ' << x - 1 + dx << ' ' << y - 1 + dy << '\n'; ^