Compilare: user.cpp: In function ‘int main()’: user.cpp:34:21: warning: unused variable ‘val1’ [-Wunused-variable] int val1=det(v[j].first,v[i].first,v[i].second); ^ user.cpp:35:21: warning: unused variable ‘val2’ [-Wunused-variable] int val2=det(v[j].second,v[i].first,v[i].second); ^ user.cpp:36:21: warning: unused variable ‘val3’ [-Wunused-variable] int val3=det(v[i].first,v[j].first,v[j].second); ^ user.cpp:37:21: warning: unused variable ‘val4’ [-Wunused-variable] int val4=det(v[i].second,v[j].first,v[j].second); ^