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发表于 2012-11-13 08:48:12
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1判断语句$ b2 W6 M9 p$ G9 p$ r/ u( N
if <condition> then
; ^! Y% U7 Y6 r. a6 t: P5 i <statement sequence1>;! u. o' f c1 H. H5 E; ^
elseif <condition> then
( x) j( {. p$ i7 w- Z0 H- m <statement sequence2>;& U- w6 ]" i" Y% Q" N0 B
else
' Y! q' X) A' G$ C <statement sequence3>;
7 k. ~5 n- a* k' S0 q$ ] s3 Q end;; x1 ]2 ~# j" X! }+ e
如果分支比较多，用：
9 [% H/ X" y0 M |: Z0 e inspect <expression>
9 _( n; M5 i3 h! \ when <constant_list> then
5 q8 W1 |2 T4 i" e" _ <statement sequence1>;! p- f4 c" T$ K1 c
when <constant_list> then: R0 a$ m/ @2 w% P) |5 s
<statement sequence2>;
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else
$ N* |: y, U Q) ~2 c1 A8 N/ N <statement sequence3>;2 [9 O7 k; Y6 a! @0 w' C' _6 Z
end;
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: M; L# Y% c8 D, G4 p6 U* K+ c. Z2循环语句
% ^! \7 ~" M5 W+ O# @3 \3 {6 g (1) from <statement sequence1>! l; V, C3 J) g C* A
until <condition> loop
; t9 w1 k+ [4 m7 y <statement sequence2>;
8 V# B3 F; S: M. H end;2 g; L4 P! \% W' s
(2) while <condition> loop
- U: L0 ?& |* r. V8 ~, b' W <statement sequence1>;
- X* {# O; f/ H# q0 C3 z end;
4 U7 b9 v M# H, x! Z# J2 w9 O9 } (3) repeat
( X9 Q T& Y' ~: J" v5 T <statement sequence1>;
$ Q4 B' S8 g. T8 { until <condition>;
& @# ]% \( m% x( D/ k/ @8 j (4) for <condition> to <condition> loop
; Q! Q9 {6 a; u, l7 d <statement sequence1>;
9 y; ?( ~' j7 n6 c3 A: N6 V9 t* r next;
3 z, T- a/ n2 E+ A% i8 h1 [8 \( T" D3中断语句4 V- K7 n d' s% s. m! B2 {! [% T* [
waituntil <condition> prio <integer expression>;
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8 E/ e1 p) z( y" C5 D4 [: i5 [以上为常用的函数！! L' C8 w" [3 L" ?7 g
还有很多，如有需要我把资料发到你邮箱里 1 y- F, }+ \( l6 S2 |! z3 D
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