/in/foo.cc: In function 'int fb(int)':
/in/foo.cc:6:13: warning: unused variable 'x' [-Wunused-variable]
    6 |         int x;
      |             ^
/in/foo.cc: In function 'int h(int)':
/in/foo.cc:16:13: warning: unused variable 'a' [-Wunused-variable]
   16 |         int a[100000];
      |             ^