/in/foo.cc: In function 'int main()':
/in/foo.cc:8:47: error: expected ')' before '!' token
  if(year%400 == 0 || (year%4 == 0 && year%100 ! = 0))
                                               ^
/in/foo.cc:12:2: error: expected ')' before 'else'
  else
  ^~~~