/in/foo.cc: In function 'int FindSecondMax(int*, int)':
/in/foo.cc:21:21: warning: 'max2' may be used uninitialized [-Wmaybe-uninitialized]
   21 |         while (a[x] != max2) x++;
      |                ~~~~~^~~~~~~
/in/foo.cc:10:13: note: 'max2' was declared here
   10 |         int max2;
      |             ^~~~