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发表于 2012-11-13 08:48:12
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1判断语句4 R6 s2 v: B' @
if <condition> then; [, W* A6 [ D& Y" R4 { G" A
<statement sequence1>;
R0 m9 l: g2 p; t- ~ elseif <condition> then6 l! J L7 j7 Y$ j. e# c
<statement sequence2>;
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<statement sequence3>;
8 s2 S. d+ G6 X end;2 h; v2 t& k5 H& [" g2 j( T# S
如果分支比较多,用:
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when <constant_list> then
7 F( R) G, g, L1 T" ] <statement sequence1>;
/ p- m2 f% t! W- ? when <constant_list> then
) p- M- ?: x, T4 M1 N; | <statement sequence2>;
/ S8 h2 O; {8 a+ O6 [ ...
* @( X' }% x% Z. z8 d else
9 w! X& v* g: S# j4 I# P9 t <statement sequence3>;! H* V2 D) l! p6 h9 d! l6 [
end;
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9 W; O) |( T2 `% O2循环语句6 ~) a1 z: ?7 N( N
(1) from <statement sequence1>* ^4 a. |3 r" S3 m3 l
until <condition> loop
8 P# a8 ^/ [% J% G <statement sequence2>;7 P4 L7 S, y6 n) L3 _
end;5 d# N1 r& z# Z# T
(2) while <condition> loop7 m9 m" b( S% y3 k3 [& C
<statement sequence1>;
* [7 K* F ]8 t' E end;
8 R: }3 Y3 x8 |7 f( d7 g (3) repeat 0 ]5 L0 e, K5 r1 m! p! U
<statement sequence1>;; u* t& {5 d/ b+ H' g1 _: F
until <condition>;4 U7 @: v" r ?: F9 ~0 M( G$ P
(4) for <condition> to <condition> loop# D$ y, M2 h O$ M: M% w- b$ i4 J+ e; H
<statement sequence1>;" m5 U, \: S- w- h: s, h# C
next;+ n, @% [5 Z/ N, v" p
3中断语句
& V6 e% B% q6 g8 ? waituntil <condition> prio <integer expression>;# b3 ?4 Q* |3 X
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' W+ l* n* G0 c5 ?9 m3 D! V以上为常用的函数!4 U+ z( ~/ M1 v/ s3 t, \4 M2 o0 O
还有很多,如有需要我把资料发到你邮箱里
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