/in/foo.cc: In function 'int main()':
/in/foo.cc:11:14: warning: left operand of comma operator has no effect [-Wunused-value]
   11 |         for (p, q; p >= 3 || q >= 4;)
      |              ^
/in/foo.cc:11:18: warning: right operand of comma operator has no effect [-Wunused-value]
   11 |         for (p, q; p >= 3 || q >= 4;)
      |                  ^