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发表于 2012-11-13 08:48:12
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1判断语句) i! Q, i i5 x/ i, @
if <condition> then
' n* K- U1 M. a- q8 |; } <statement sequence1>;
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; N6 c9 y+ U' ^3 @! v <statement sequence2>;1 q( f7 B+ f# ]$ R) h! b) l0 m+ ?9 e
else
+ K& R7 n5 C; z" O! l! `3 A <statement sequence3>;
* |( k p, {- i' h( g o end;
3 D! a) o& b1 ~如果分支比较多,用:
( _0 u4 J4 h! n3 V" f inspect <expression>6 |8 z1 C( v4 @+ `1 A
when <constant_list> then6 s1 a* T r6 c" _; x* i
<statement sequence1>;; i+ Q' ^ ^3 f2 y* _" F
when <constant_list> then
' n" Q( t- b6 K; j. v <statement sequence2>;
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else4 c% {1 K6 \% [/ N y% A, `
<statement sequence3>;/ J( s# a7 @* v" }% Y1 Y$ d
end;
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; g6 o0 j' {/ M2循环语句$ S& Y6 z* s. P7 M1 G" S
(1) from <statement sequence1>
, _) t' o( N& F until <condition> loop
6 k) i! g |* |, P <statement sequence2>;1 m$ q/ r) U- v7 w; J4 Z
end;5 s5 T/ w! m: M7 h8 }) L
(2) while <condition> loop h! {* M. Y: `% ~1 q- ^7 b
<statement sequence1>; O! w$ K3 L4 p( X4 k' w' S. g/ ]
end;
- H+ S: k* R* I1 i% S5 a2 E- a (3) repeat
/ _" X) h1 W6 v+ g9 @' G <statement sequence1>;
, c1 }3 x1 a( j# \+ m8 t j- j until <condition>;
- [* [. u' x+ t/ s3 A" ~: g (4) for <condition> to <condition> loop6 o) ~5 o! L8 ^
<statement sequence1>;
" `% m+ O1 O5 i6 s8 F/ {( u next;
6 d- c+ Y( ]4 M0 ?: V+ l4 Q7 I* ^3中断语句
5 R, A5 n+ Z! v: R8 l7 O waituntil <condition> prio <integer expression>;
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以上为常用的函数!
5 N) N6 T F# m$ a7 t) j还有很多,如有需要我把资料发到你邮箱里 - b; T7 ]( g" q$ {( W. K( @9 |( v
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