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发表于 2012-11-13 08:48:12
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1判断语句( ?6 d# T: o: r; ?7 ~5 ?" ]$ R7 Q* ~- y
if <condition> then0 ~1 U" a1 v' {, v+ c5 H
<statement sequence1>;
% j& T* J& f/ A elseif <condition> then& n3 C5 ]! |$ a0 z6 \, f
<statement sequence2>;
, h% m& |" V) {2 P0 _8 O5 `7 r else
7 S1 C+ _+ G6 ^/ _; F2 B <statement sequence3>;
1 O8 e3 m& h9 U) ~ end;6 R/ d5 @" T! R. H6 J( d
如果分支比较多，用：
$ h& @$ P2 N) H" [5 @ inspect <expression>% v- a' ~: D9 R- B: |
when <constant_list> then
* p" C) m# L. U& Y& f <statement sequence1>;
3 u. d3 d0 y6 x4 A# X when <constant_list> then
7 b! ~5 P: d3 d" f <statement sequence2>;
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else6 E; f' D( R8 I' Y
<statement sequence3>;9 s! ~0 X% {6 v2 Y0 d
end;
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+ u3 A1 d8 ^1 g1 L0 S3 n# n% A2循环语句4 Y3 {8 I! u* M; {
(1) from <statement sequence1>
4 a4 _- _, k: K/ B. ` until <condition> loop
" T! M; n, N. b2 r* Z <statement sequence2>;; h2 G8 h. w0 z8 v% S
end;
( L$ m7 S6 h$ S! _1 h) [ (2) while <condition> loop* ?7 V5 \0 R+ a/ h! Q' @( X
<statement sequence1>;
0 Z5 I1 t( w; R3 `8 t+ h4 k end;# T; s+ @, a6 C Q8 T
(3) repeat 8 l4 {4 Y# S8 e: e+ L7 x( L
<statement sequence1>;
7 C. K; S6 O) f6 G; e, X ] until <condition>;
) V, R5 p9 P" c. { (4) for <condition> to <condition> loop9 y) e5 C! U& U: _ U, |- H' _
<statement sequence1>;2 ]1 O, f* K8 @5 H9 l; C
next;8 G4 Y. j+ x R2 W3 J
3中断语句 ^; B' {& U, _; N! }$ I3 Z
waituntil <condition> prio <integer expression>;
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, B3 N q% K" ~2 A, |以上为常用的函数！
- p l& h& l- e9 O1 ] d还有很多，如有需要我把资料发到你邮箱里 " N4 |: t# [( G7 f% f: c# a! k$ p
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