Compilare: user.cpp: In function ‘int main()’: user.cpp:29:42: warning: unused variable ‘minyj’ [-Wunused-variable] int minxj=min(x1[j], x2[j]), minyj=min(y1[j], y2[j]); ^ user.cpp:30:42: warning: unused variable ‘maxyj’ [-Wunused-variable] int maxxj=max(x2[j], x2[j]), maxyj=min(y1[j], y2[j]); ^