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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句
& I9 i) D5 |1 X; M/ B if <condition> then0 n; K5 [: l4 |- |# e0 z
<statement sequence1>;
- I z, T) h! G9 U2 G- `% ^ elseif <condition> then
5 D t* W- `# b, ^" Z% g v" s <statement sequence2>;& I$ x6 m- P M
else 9 } b B3 w( _; @
<statement sequence3>;, k. d8 X$ W1 F ~4 {9 p& `3 l& [2 ?2 V
end;. f. p: z( G% U% A7 h6 j
如果分支比较多,用:
7 o+ v3 Y, o1 Y5 e7 |. K inspect <expression>
/ { g1 g% B: b% E# ` when <constant_list> then
7 ?8 z; s, R# U2 w5 G <statement sequence1>;
/ T8 |8 g6 c/ w+ y when <constant_list> then
: W# M% E# G) l1 y/ X1 F* o <statement sequence2>;5 @- y$ V" K6 N2 m
...
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<statement sequence3>;* u4 ]- E+ C# N2 G' F7 w1 G! a
end;
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$ u2 J1 S! K5 h6 E& g( n. k8 K2循环语句: R; H! Q3 b( `+ y/ `/ q
(1) from <statement sequence1>6 m- I: e/ v4 {! V. [ V9 {
until <condition> loop
# U+ m) ^9 \# V' O <statement sequence2>;- D0 L8 [8 d* M4 S7 n1 }' q
end;
/ e0 l6 [& m W3 C0 `5 o6 { (2) while <condition> loop
+ r. F# c6 I* K4 ? <statement sequence1>;
$ P, H" {# N% m; f; I% u end;$ Q& @+ f+ q4 T. Y2 C# o
(3) repeat
' S& e2 N0 e. ^0 h <statement sequence1>;
7 Y4 T2 B, O4 g: U% B5 I until <condition>;
7 C9 W9 d& m9 [9 y& ? (4) for <condition> to <condition> loop1 e/ Z( Z) S1 r) l7 k1 P2 T1 \, O
<statement sequence1>;
: L, r6 _6 R& s$ Z7 G( ` next;
7 X+ ?7 x% G! }! w! m2 \2 o% }3中断语句8 t- n" q) j, ]8 m9 X
waituntil <condition> prio <integer expression>;' J& Z+ T) d& F& `* g" i
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以上为常用的函数!- Z5 z/ {3 v% p0 {$ j& D6 D
还有很多,如有需要我把资料发到你邮箱里 + T+ e' b/ M, M
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