foo.cc:11:2: error: expected unqualified-id before 'if'
  if(d[0]%4==0||d[0]%400==0)
  ^~
foo.cc:20:10: error: expected '}' at end of input
          if
          ^~
foo.cc:10:52: error: expected unqualified-id at end of input
  int month[12]={31,28,31,30,31,30,31,31,30,31,30,31};
                                                    ^

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