foo.cc:3:9: error: variable or field 'Div' declared void
    3 | void Div(
      |         ^
foo.cc:5:3: error: expected primary-expression before 'while'
    5 |   while()
      |   ^~~~~
foo.cc:5:3: error: expected '}' before 'while'
foo.cc:4:2: note: to match this '{'
    4 |  {
      |  ^
foo.cc:4:3: error: expected ')' before 'while'
    4 |  {
      |   ^
      |   )
    5 |   while()
      |   ~~~~~
foo.cc:3:9: note: to match this '('
    3 | void Div(
      |         ^

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