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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
' Z/ E. g) H; H4 k: f6 ?1 o if <condition> then
, ^9 z o! N# z& |) t+ k. c5 t <statement sequence1>;
- a* O C k* ~+ h$ |# \* J/ z elseif <condition> then
( j8 }: b) I9 W2 J* h, b# j <statement sequence2>;, S: i; K% o+ D# `' D& I
else
x" J, H- d. v! V6 V3 L <statement sequence3>;
$ ^& t, ^5 o# Y: K# L9 [( `1 ~ end;' t0 R/ o- n( ~4 ]0 h# b% Z! t$ ~
如果分支比较多，用：# E# t5 E( t4 a0 N$ j
inspect <expression>" Z" J8 s# V" v0 Y6 j |
when <constant_list> then, j% r( \/ Q6 W6 i" S1 P
<statement sequence1>;9 X4 N: G' _9 U! W/ B# c9 s* \% m: r
when <constant_list> then
) N) t" O# n) n/ h# c7 d/ y4 g* U <statement sequence2>;7 v. J" q4 ]5 H: S" M
...
3 [: u7 `! G* | else
" P* i3 Z; H' {9 C5 a P <statement sequence3>;
/ M( F9 @9 R* Z5 a! J' T* Yend;
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2循环语句- Y2 I6 o2 c* H; R- w# _9 V
(1) from <statement sequence1>5 E/ }, I0 i' H" i4 [( [& Q* t
until <condition> loop
, C; v9 A, |$ y! }/ ] <statement sequence2>;
" ]! \7 p9 p: W( ~! {& E6 A end; n( ?: R5 s% n) `) j* v
(2) while <condition> loop2 d& |5 S3 Z z* G
<statement sequence1>;9 s5 H; {% j: M3 R+ ~: f
end;, p5 a" C$ C- a$ v% k# ~0 {& v
(3) repeat & |, H0 I. f# A X2 I- U
<statement sequence1>;
1 O% i7 n: e& u$ |- ^" ` until <condition>; A0 X; g4 x* c, l- L+ k* p
(4) for <condition> to <condition> loop
9 W! w7 f' C& k% z <statement sequence1>;
! L6 Y6 S# g. x; q) i+ j next;* e. o5 ]' b+ y: ^% Y
3中断语句
. f# ]/ ?/ z- ~# ^- p H3 Z: u7 q waituntil <condition> prio <integer expression>;
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& h0 h7 }- o, T' H1 ?以上为常用的函数！
/ X# x4 ]4 ? ?8 `, J8 C) x还有很多，如有需要我把资料发到你邮箱里 $ m4 m* e1 ?. m( R1 k
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