/in/foo.cc: In function 'int main()':
/in/foo.cc:8:6: warning: unused variable 'x' [-Wunused-variable]
  int x[2],y[2];
      ^
/in/foo.cc:8:11: warning: unused variable 'y' [-Wunused-variable]
  int x[2],y[2];
           ^