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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# `) c! r# D, @" N( i
if <condition> then% _2 g0 W9 K6 m; h9 s/ K' x
<statement sequence1>;
$ u0 q0 b* f. E8 x elseif <condition> then
- d* ]1 l2 d( D F x2 k6 s* {. f <statement sequence2>;
) m9 {, w8 D- m5 ]8 {' Y else
. W6 [( o2 w7 \; n* d& ~ <statement sequence3>;
* ^. W) B5 S; W* n6 }2 S end;* i/ N; ?. P3 g" @/ [2 H8 W
如果分支比较多,用:+ M; R h$ n4 I0 R2 ~# K
inspect <expression>
: @# h4 I& a2 e7 z when <constant_list> then
' Y; H; l6 c& E% S0 \7 g <statement sequence1>;# Y1 c H4 E/ r& C; o/ d
when <constant_list> then0 N0 T' z( d. f: Z% \; [) Y
<statement sequence2>;
3 a+ F0 r: P0 B2 x$ M ...
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<statement sequence3>;
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) g4 M+ U( J$ k' R* c2循环语句
8 v' X5 M9 F/ p5 a2 ? Q! Q (1) from <statement sequence1>
1 B. O5 \& i m+ q* Y. ]# Z until <condition> loop* h$ `. C2 d1 s9 A8 w8 ~/ [( ~
<statement sequence2>;
3 ^& g8 {3 q. N1 c9 U$ s end;9 O; w1 i. I' N% A' m Y/ }' O
(2) while <condition> loop, h3 v9 R, p# v" N7 ?5 ^
<statement sequence1>;
, |" H' L* e% o7 N end;- ]# t8 |6 ]' f5 o
(3) repeat 8 F* T$ Q$ q: u
<statement sequence1>;2 ^- G9 l2 ]& E" W) e/ @/ f
until <condition>;
% Q. _$ `9 h. A/ L+ @ (4) for <condition> to <condition> loop
0 w6 L) D8 `& y" t2 e <statement sequence1>;- [* @! q4 B5 u* p% z* u
next;9 O8 r/ {5 p6 _0 n' B2 |( `& o# K& j
3中断语句
6 E6 C, H5 P- E: _3 ?* I waituntil <condition> prio <integer expression>;
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以上为常用的函数!. y1 o1 G" E q8 M# A9 M
还有很多,如有需要我把资料发到你邮箱里 ( \' a$ v3 w! d7 I/ a
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