foo.cc: In function 'int FindSecondMax(int*, int)':
foo.cc:21:13: warning: 'j' may be used uninitialized [-Wmaybe-uninitialized]
   21 |         int j;
      |             ^
foo.cc:23:30: warning: 'secmax' may be used uninitialized [-Wmaybe-uninitialized]
   23 |                 if (a[i]<max && a[i]>secmax)
      |                     ~~~~~~~~~^~~~~~~~~~~~~~
foo.cc:14:13: note: 'secmax' was declared here
   14 |         int secmax;
      |             ^~~~~~

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