foo.cc: In function 'int secondmax(int, int*)':
foo.cc:7:13: warning: unused variable 'temp' [-Wunused-variable]
    7 |         int temp;
      |             ^~~~
foo.cc:28:16: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
   28 |         return ret;
      |                ^~~

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