Compilare: user.cpp: In function ‘int main()’: user.cpp:36:18: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] int w, x, y, z; ^ user.cpp:36:15: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] int w, x, y, z; ^ user.cpp:36:12: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] int w, x, y, z; ^ user.cpp:36:9: warning: ‘w’ may be used uninitialized in this function [-Wmaybe-uninitialized] int w, x, y, z; ^