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发表于 2012-11-13 08:48:12
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1判断语句' g. x/ ~1 j1 m1 b
if <condition> then
% M. H2 e' C# D/ ^; O, L <statement sequence1>;6 z. C, V4 r, ]1 q$ u0 i
elseif <condition> then
0 R7 Q6 T+ P- D& { <statement sequence2>;
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<statement sequence3>;) f: P! r( \& H+ B
end;' P" R, S3 e" [7 X' K+ s% v$ a
如果分支比较多,用:
9 L3 j F4 H- b+ E inspect <expression>
( ~" D3 B6 u9 }& G/ m& }- Z+ y* J when <constant_list> then( X- p8 |/ O; E; t+ y& F
<statement sequence1>;
& w& t& j6 \5 |0 U( E2 R5 p when <constant_list> then
1 z5 s' u3 Q7 d, e m7 r <statement sequence2>;
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else
1 \! J8 T0 t9 a0 z; w1 D3 T <statement sequence3>;
! i3 X# P' f$ Z# w9 _end;
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2循环语句
6 Y4 o+ n7 |. a! e' x0 S& o (1) from <statement sequence1>8 ?# i$ W) d# t5 l$ ]5 i' n7 j
until <condition> loop; I' x" m! V8 A& [* j3 _- `- g2 V
<statement sequence2>;
& p, j9 \4 J: n8 ?! Y end;! B7 \ X C/ ^* B" r L
(2) while <condition> loop! ~# B6 }1 c- W1 X- `1 C# l
<statement sequence1>;
% l6 ~) p* V7 J% C end;* `$ [) v# Q% D
(3) repeat
! C4 B/ o E; _: G' \- ^( L/ x <statement sequence1>;
* ]: j! I, a8 h0 m: ^8 H until <condition>;
2 U- j3 a" Z4 x2 n* B6 I (4) for <condition> to <condition> loop, i5 ~: k3 Y7 ^# U+ K
<statement sequence1>;9 H6 w/ [7 z9 {$ V
next; t$ F' Q0 n* Z; @7 ~+ u6 \' u
3中断语句
8 H1 f8 A* n5 D5 j/ Z8 X2 _ waituntil <condition> prio <integer expression>;
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% B- G! [/ c4 V; f& [$ z0 O" t+ }以上为常用的函数!
; Q$ |! k Y. X# u还有很多,如有需要我把资料发到你邮箱里 3 o, N9 R. X/ E$ c3 w
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