Raptor ?????

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Raptor ?????

• ???????

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Raptor???????

• ??????(Visual Programming Tool)
• ??????(Flowchart Interrupter)
• Raptor???????(???????)
• http//raptor.martincarlisle.com/

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???????????

• ??????????????????????
• ?????????
• ???????????/?????
• ???20??????????????? ?????????????

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Raptor????????

• ????
• ??????????????,????????????,????????????????
• ??
• ?????????????????
• ??????
• ????????, Raptor??????(Syntax/Grammer)??
• ????
• ????(User-friendly)
• ????????(Project)???
• ?????????????(Program)????(Readability)

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Raptor??????
??????
?? ????
????
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????????

• http//minisite.proj.hkedcity.net/sec-te/cht/topic
  s/prog_raptor/index.html

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??Raptor????????????

• ?????????,???????????
• ??????????????
• ?????????
• ???????????
• ???????????

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Raptor????(??)
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???????

• Raptor????????(Directed Graph)
• ?????Start???End?
• ?????Start???, ????End????
• ??Start???End?????????, ?????????????

????????????
??????????????
?????????????
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?????(Variables)?

• ??????????????
• ?????????????
• ?????,?????????

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??(Variables)

• ????,????????, ???????
• ????????????(initializing a variable)
• ???????????,?????????(Runtime Error)
• ?????????
• ????
• ????
• ?????????, ???????????
• ?????????, ???????????

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??(Variables)

• ???????????
• ????
• ???????????
• ???????????????????,?????????????
• ?Hello, send2you, it_a_nice_day
• ?2myfriend, iamveryangry!
• ?????????????(Reserved word)??
• ???????
• ?????? (e.g. a, exam_mark)
• ?????? (e.g. Average, Avg)

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?????(Constant)?

• ?????,??????????
• ??pi, e, true, false, yes, no
• pi ?? 3.14159274101257.
• e ?? 2.71828174591064.
• True ? Yes ?? 1.
• False ? No ?? 0.

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???!

• ?????????? (L)legal,?????? (I)Illegal?????,??????
• 1) U_2
• 2) Money
• 3) Thisisaveryveryveryveryverylongname
• 4) Mickey-Mouse
• 5) 365_Days
• 6) Begin
• 7) End_Of_Data
• 8) Procedure
• 9) Is This Identifier Legal
• 10) Why_Isnt_This_One_Legal
• ?RAPTOR??????,?????????,?????????????(True/ False)

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???!

1. ???? x ????????
2. ? x?x2 ????x?x/3, x ????????
3. ?? x?32 ??variable?32, ???????

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??(Statement)

• ??(Statement)???
• ?????????????????,????????????
• Raptor??6???
• ???? (Sequential structure)
• Input,
• Output,
• Assignment,
• Call,
• ???? (Control structure)
• Selection
• Loop

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???

• ??????
• Assignment
• Loop
• Input
• Output

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???

• ??????
• Input
• Call
• Selection

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????Input Statement

• ???????
• ????
• ?????????????
• ???????,??????
• ?????(prompt)??
• ???????,?????????
• Input Text(????)
• Input Expression(????)
• ??Enter a number between low and
  high

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????Output Statement

• Output Expression(????)

• Output Text(????)

?????
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???!

1. ??????,???1234,???1234,????????????
2. ??????????,?????????
3. ??????????????????
4. ??????????????,????????Hello, John. Nice to
   meet you! I like running too!

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??Assignment

• Assignment ???
• ?????????
• Expression(??) ???
• ??????????????????,????????????
• Assigment ???(Syntax)
• ltVariablegt ? ltExpressiongt ? Set ltVariablegt to
  ltExpressiongt
• lt????gt ? lt??gt ? Set lt????gt to lt??gt
• ??
• Cost ? (Tax_Rate Non_Food_Total) Food_Total
• ?? ? (?? ?????) ????

?? Variable being assigned (????????)
? Assignment Symbol (????)
(?? ?????) ???? Expression to be evaluated and assigned during run time (????????????????)
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???Operator

• ????
• Bulit in Operator
• E.g. X/3, Y7
• Function/Method (??/??)
• E.g. sqrt(4.7), sin(2.9)
• Relational Operator, Logical Operator ???
  Selection? Loop??
• Relational Operator??????(T/F)?, ?Logical
  Operator???????

basic math (????) , -, , /, , , rem, mod, sqrt, log, abs, ceiling, floor
Trigonometry (???) sin, cos, tan, cot, arcsin, arcos, arctan, arccot
Relational (???) , !, /, lt, gt, gt, lt
Logical (??) and, or, not
Miscellaneous (??) random, Length_of
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???!

• ?????????
• 1) 46 / 2
• 2) 46 / 3
• 3) 46 rem 3
• 4) 46 2
• 5) 12 lt 13
• 6) 35 gt 90
• 7) 120 / 602
• 8) 46 lt 49.5
• 9) True and False
• 10) (False and False) or True
• 11) (45.6 lt 32.4) or (14 lt 28)
• 12) 8 lt 10 lt 20
• 13) True and 7
• 14) 44 lt 121.456
• 15) 77 -1128

• ????????
• (A) Arithmetic operators?????, (L)
  Logical?????, ?? (R) relational operators?????.
• 1) !
• 2)
• 3) /
• 4) not

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????Procedure Call statements

• Procedure??????,???????(Task)
• ????????,???????,??????????????
• ????????????????(Data)

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??
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??Comments

• ?????????????????????????,?????????????????
• ?????????????,??????????????
• ???????
• ????????,???????? Comment ????

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???!

1. ?????????????????,???????,????????????????
2. ???????????????????
3. ?????????????(??????????)

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????Control Structure

• Sequential Structure(????)
• ?????,????
• Selection Structure(????)
• ?????,????
• ??????True?False
• ??????,60???,?????????,????????

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????Logic Table
And Table
Or Table
Expression Result
True and True True
True and False False
False and True False
False and False False
Expression Result
True Or True True
True Or False True
False Or True True
False Or False False
Not Table

• ??
• ????8?,????????40,?????
• ???????,?????????,??????????,????

Expression Result
Not(True) False
Not(False) True
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???? Control Structure
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????Control Structure

• ???????

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????Control Structure

• ??????

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???!

• ????????????Always True ??(A),
  Always False ??(B), Good ??(C)
• GR_Score gt 100 or GR_Score lt 90. GR_Score gt
  100 and GR_Score lt 90. GR_Score lt 100 or
  GR_Score gt 90. GR_Score lt 100 and GR_Score gt
  90.

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???!

• ???????,??X??????1, 2, ?3,????????? ONE, TWO,
  or THREE
• ???????,????????(Fahrenheit)?????(Celsius)???????
  ???????? (F to C ? C to F),????????,??????????????
  ?
• C to F F 9/5 C 32
• F to C C 5/9 (F 32)

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????Iteration Control

• ????????????????????????
• ????,???????????????
• ?????????
• ???????????????
• ????(Cascading Loop)
• ????(Infinite Loop)
• ????????No
• ????,?????????????????

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??

• ???????????????
• ?????
• ???????????

• ?????????
• ?????
• ????

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???!

• ???????????

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??

• ??????????

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??

• ??????????

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??

• ??????????

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????????

• ??????????,???????Possible_Prime?
• ????????????? (Set Is_Prime to True)
• ??x?2? Possible_Prime-1
• a??x??Possible_Prime,
• b??x?Possible_Prime???
• c?????????? (Set Is_Prime to False)
• ?? Is_Prime is True,
• ??Possible_Prime?????

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• ??????????,???????Possible_Prime?
• ????????????? (Set Is_Prime to True)
• ??x?2? Possible_Prime-1
• a??x??Possible_Prime
• b??x?Possible_Prime???
• c?????????? (Set Is_Prime to False)
• ?? Is_Prime is True,
• ??Possible_Prime?????

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????????

• ??????Selection????Loop???,???????????
• ??????????????????? (Selection)
• ??????????????(?????)? (Selection)
• ??????????????? (Cascading Selection)
• ???????????? (loop)
• ???????????? (count-controlled-loop)

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??????

• ????????????????
• ?? Sequential, Selection, Iteration
  ???????,???????????
• ????????????????????
• ???????Selection?Iteration?????????????
• ?? Selection?iteration??????????
• ?? Selection????
• ?A???A,
• ?A?B
• ?A,B,C.???
• ?? Iteration????
• ??A??
• ?????,????????????????????
• ???????????,??????????,???????

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???!

• ?????????????? Sequential (A)Selection
  (B1)Cascading Selection (B2), Loop (C)
• - ???????????. - ????????????????. -
  ??????????. - ?????????,??????. -
  ????????????????0. - ?????????????????. -
  ?????????????? - ???????,??Odd?Even
• - ??1?100?????? - ?????????,??????-1

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????

• http//raptor.martincarlisle.com/
• http//minisite.proj.hkedcity.net/sec-te/cht/TE/By
  KC/IT/index.html