Compilare: user.cpp: In function ‘int main()’: user.cpp:26:37: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << x << " " << y << " " << z; ^ user.cpp:26:24: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << x << " " << y << " " << z; ^ user.cpp:26:12: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << x << " " << y << " " << z; ^