Compilare: main.cpp: In function 'int main()': main.cpp:81:12: warning: unused variable 'x1' [-Wunused-variable] int Q, x1, x2, y1, y2; ^~ main.cpp:81:16: warning: unused variable 'x2' [-Wunused-variable] int Q, x1, x2, y1, y2; ^~ main.cpp:81:20: warning: unused variable 'y1' [-Wunused-variable] int Q, x1, x2, y1, y2; ^~ main.cpp:81:24: warning: unused variable 'y2' [-Wunused-variable] int Q, x1, x2, y1, y2; ^~