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发表于 2012-11-13 08:48:12
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1判断语句2 c6 a! S3 G* w! y- u0 e* {
if <condition> then& ?; w: f- q( g0 |3 M+ X
<statement sequence1>;+ d+ s: k7 @2 @: K
elseif <condition> then* a3 Q: V0 u, N! L$ _' t
<statement sequence2>;5 H5 [- a, ~7 L; P; _/ o3 B5 M
else
+ ^0 t" ?+ }- ?: q3 ~/ l <statement sequence3>;
+ `6 M# t, c$ m1 _) G( [) V end;
; s: ?6 v8 `% J( g* D3 I# C如果分支比较多，用：
9 \+ }6 c+ q( s, b; [" y! r inspect <expression>: I' u/ ~# k' H
when <constant_list> then
3 b5 B& Q" W- x; p( t3 c <statement sequence1>;
+ K5 k$ m3 Q* K when <constant_list> then% S8 O6 |6 C8 M
<statement sequence2>;
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else
4 o# ?$ E. X. ^! \6 A5 h! y" U <statement sequence3>;/ N* {. w/ x% X: b+ ~
end;8 f7 Z0 M& v( d0 _5 ^: l
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2循环语句% E+ y# H4 O7 ~3 u( h+ P; q
(1) from <statement sequence1>' i' N* A4 A8 p; k+ b5 N& y
until <condition> loop; |1 w; y" P s# T+ h/ q
<statement sequence2>;
& T* I k9 r$ J' S* p; x! c end;7 I9 S* E; [$ X
(2) while <condition> loop L( e( b$ F. [2 ^
<statement sequence1>;6 o% o* y# ^2 ^$ \, C
end;
( M. R6 Y+ F' l' W( K: A9 | (3) repeat * A/ c7 D: k7 r7 W* i8 |% w7 r
<statement sequence1>; D( t$ B. ~) g Z6 Q
until <condition>;
9 e" O& k { j" N0 F9 g2 x5 Y' | (4) for <condition> to <condition> loop" ~, m4 v! R! S' B! q) t
<statement sequence1>;
! z: B) l+ n8 _. P; r& t next;
' o7 R) L2 q2 s1 J" b- u3中断语句
0 g3 \& J. t: V waituntil <condition> prio <integer expression>;
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以上为常用的函数！
% p5 q" j3 z4 ?' s+ n7 V还有很多，如有需要我把资料发到你邮箱里
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