foo.cc: In function 'int test(int)':
foo.cc:14:22: error: 'pow' is not a member of 'std'
   14 |         int c = std::pow(10, b);
      |                      ^~~
foo.cc:15:22: error: 'pow' is not a member of 'std'
   15 |         int d = std::pow(10, b - 1);
      |                      ^~~

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