foo.cc: In function 'void work(char*)':
foo.cc:35:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  if (d1 < d2)
     ^
foo.cc:39:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  if (d1 > d2)
     ^

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