In function 'int pagecount(int, int)',
    inlined from 'int main()' at /in/foo.cc:20:26:
/in/foo.cc:5:16: warning: 'page' may be used uninitialized [-Wmaybe-uninitialized]
    5 |     while (num > 0) {
      |            ~~~~^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:16:9: note: 'page' was declared here
   16 |     int page;
      |         ^~~~