/in/foo.cc: In function 'int main()':
/in/foo.cc:15:35: warning: use of assignment suppression and length modifier together in gnu_scanf format [-Wformat=]
   scanf("%lf%*lf%lf", &a[i], &b[i]);
                                   ^
/in/foo.cc:18:35: warning: use of assignment suppression and length modifier together in gnu_scanf format [-Wformat=]
   scanf("%lf%*lf%lf", &c[i], &d[i]);
                                   ^