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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% F( t- N! J1 ^/ Q. I
if <condition> then. B8 S4 E. O+ m% Z& o
<statement sequence1>;3 }6 k9 w* A! a
elseif <condition> then% W0 i1 F! ~) D7 S7 N" |) h" b; e d
<statement sequence2>;
+ x s8 H) Y5 E5 A8 t else
2 s" B4 [/ \5 R- b/ y* i2 v0 b, K <statement sequence3>;+ K y9 b, t* Y5 R. r6 A
end;5 Q- Q9 M Y/ I+ g- s4 t) y' v
如果分支比较多,用:& W3 j+ r% K8 U$ E8 u1 j
inspect <expression>" \; `" D. A9 j- g/ k) f% K
when <constant_list> then" [# l" B# B0 q' h4 n0 L; d6 u
<statement sequence1>;
& J: E2 Y4 o- | when <constant_list> then
5 Z* \1 q" Q" z) T: }3 Y <statement sequence2>;
- V. W- N( E$ w ...
% h }4 d1 D2 {' E+ g |/ ^ else
& t+ b K8 s7 ?! Y' J- K; s& D- x! Y <statement sequence3>;- f; i, N6 H. L; d, p2 A
end;7 V8 z- p1 ^( f% M D
9 [) Z- ~" c) l2循环语句# O# Z: D+ \; S4 Q
(1) from <statement sequence1>3 x* q+ S& S! p8 h
until <condition> loop4 \; L0 P; @! v) y
<statement sequence2>;
# w. ?4 Q& |4 S, d( Y; ^ end;
4 C% O8 d: R. V$ n, V; |4 z2 X (2) while <condition> loop
1 l, K( Z+ I' x* [$ ^ <statement sequence1>;
6 C3 E; F* C4 p$ t) n" v* ] end;$ l& o. B# \ g; a+ d
(3) repeat & T8 t3 H9 a4 W
<statement sequence1>;
5 y% Y3 p4 \3 K until <condition>;. Q4 G' S+ W% W# q3 N
(4) for <condition> to <condition> loop2 c: v, R7 H3 x1 R5 c
<statement sequence1>;
' n% f; U% O7 G( ^ next;& W3 K+ ^( _) b1 P% W$ I; k8 M
3中断语句
J9 E* J# g* e& g% i6 t* J3 T6 q. a waituntil <condition> prio <integer expression>;) d" C7 _& S9 I, K
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以上为常用的函数!: {5 ~3 r$ h& O5 w; ?+ @0 \" J
还有很多,如有需要我把资料发到你邮箱里 ; v4 @7 v9 M+ `7 M( {0 ~$ q
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