Compilare: user.cpp: In function ‘void dateIn()’: user.cpp:66:6: warning: unused variable ‘x1’ [-Wunused-variable] int x1, y1, x2, y2; ^ user.cpp:66:10: warning: unused variable ‘y1’ [-Wunused-variable] int x1, y1, x2, y2; ^ user.cpp:66:14: warning: unused variable ‘x2’ [-Wunused-variable] int x1, y1, x2, y2; ^ user.cpp:66:18: warning: unused variable ‘y2’ [-Wunused-variable] int x1, y1, x2, y2; ^