/in/foo.cc: In function 'void check(int, int*, int*)':
/in/foo.cc:32:28: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |         if (strlen(eqn[i]) < 5 + base) {
      |             ~~~~~~~~~~~~~~~^~~~~~~~~~