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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
) P6 r1 ~: u6 w% z3 a) E if <condition> then
- k+ R# l9 d* ^* o+ W8 f" N7 b0 I <statement sequence1>;; A. k0 p2 ?' s# ]/ g
elseif <condition> then
, T4 }' ?: \8 @# }" b& F1 d6 @5 { <statement sequence2>;
9 v8 b6 K$ R1 W7 p2 F% Y else 7 ?( ]9 Z) _% `/ R& G
<statement sequence3>;& c: h/ F Q i" k" b- m
end;
9 `0 U: B+ i3 _1 t0 A1 K如果分支比较多，用：
) y5 Y* N$ y7 j inspect <expression>
3 w' Q$ ^& H* |& K p: j when <constant_list> then( e/ p5 R+ ^8 A
<statement sequence1>;
( i. q" d" p' N+ L when <constant_list> then* C, _/ l) q! r" D% g, ?
<statement sequence2>;
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else! ^* I% D( o% M# M& q3 @
<statement sequence3>;
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2循环语句
8 q9 I, S: a; B2 E (1) from <statement sequence1>* H2 L& \- v4 R) x
until <condition> loop
1 x9 r* q: ?" i1 a/ c8 j7 ^" o" y2 g <statement sequence2>;
" g/ F$ ~0 O4 l- q' E' E end;$ H3 Y6 x7 N; F+ _* }0 A3 }( q
(2) while <condition> loop9 p3 g: w3 F# N- ?9 H
<statement sequence1>;
L/ q$ v1 x( R: T end;
& ~; ?. S q& |; _& S (3) repeat
; V, A" h% Z0 [8 U" C8 F1 e/ ^ <statement sequence1>;3 e# _, \) Y9 g# W4 J/ S1 ?
until <condition>;4 O; k; E% Q$ `" u! P. _! v: P7 @
(4) for <condition> to <condition> loop- {4 u% K- G. b- ^
<statement sequence1>;
4 J; n8 y1 e5 N* n5 C0 v next;1 P z* {) q: `$ I/ H' o
3中断语句
( q k8 X5 k- | waituntil <condition> prio <integer expression>;
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以上为常用的函数！' ?* i; E" ^. ~9 P+ p
还有很多，如有需要我把资料发到你邮箱里 8 s! _: H+ ]( a2 P- o: B' F+ c
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