Compilare: user.cpp: In function ‘int main()’: user.cpp:78:23: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] x = x1, y = y1; ^ user.cpp:78:23: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized]