foo.cc:1:2: error: expected unqualified-id before 'for'
    1 |  for(a1=0,a1<=money;a1++)
      |  ^~~
foo.cc:1:21: error: 'a1' does not name a type
    1 |  for(a1=0,a1<=money;a1++)
      |                     ^~

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