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Jul 31st, 2012
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  1. <constdef> --> const <type> <id>=<value>
  2. <type> --> int | float | double | char | bool
  3. <id> --> <letter>{(<letter>|<digit>|_)}
  4. <value> --> <intval>|<floatval>|<doubleval>
  5. |<booltval> | <chartval>|<stringval>
  6. <intval> --> [<sign>]<digits>
  7. <digits> --> <digit>{<digit>}
  8. <floatval>--><intval>.<digits> [e<sign><digits>]
  9. <doubleval>--> <floatval>
  10. <boolval>--->true | false
  11. <chartval>-->'<char>'
  12. <stringval>-->"[<string>]"
  13. <string>---><char>{<char>}
  14. <chartval>-->'<char>'
  15. <char> ---> (<letter>|<digit> | <upper> |<other>)
  16. <upper>-->A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z
  17. <letter>--> a|b|c|d|e|f|g|h|i|j|k|l|m|n|o|p|q|r|s|t|u|v|w|x|y|z
  18. <other>-->+|-|*|@|$|%|^|&|*|(|)|:|[|]|{|}|<space>
  19. <sign>-->-|+
  20. <space>--->
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