Compilare: main.cpp: In function 'int main()': main.cpp:32:17: warning: unused variable 'a' [-Wunused-variable] int a=min(x2[i],x2[j]); ^ main.cpp:33:17: warning: unused variable 'b' [-Wunused-variable] int b=max(x1[i],x1[i]); ^ main.cpp:34:17: warning: unused variable 'c' [-Wunused-variable] int c=min(y2[i],y2[j]); ^ main.cpp:35:17: warning: unused variable 'd' [-Wunused-variable] int d=max(y1[i],y1[j]); ^