Compilare: main.cpp: In function 'int main()': main.cpp:51:6: warning: unused variable 'up' [-Wunused-variable] 51 | int up = min( A.i1, min( B.i1, C.i1 ) ); | ^~ main.cpp:52:6: warning: unused variable 'down' [-Wunused-variable] 52 | int down = max( A.i2, max( B.i2, C.i2 ) ); | ^~~~ main.cpp:54:6: warning: unused variable 'left' [-Wunused-variable] 54 | int left = min( A.j1, min( B.j1, C.j1 ) ); | ^~~~ main.cpp:55:6: warning: unused variable 'right' [-Wunused-variable] 55 | int right = max( A.j2, max( B.j2, C.j2 ) ); | ^~~~~