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发表于 2012-11-13 08:48:12
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1判断语句: K" t: V! Q1 Z) x: O1 ?# [
if <condition> then
: ^" O- H: p4 l6 Z/ k4 N7 | <statement sequence1>;# c/ o1 _# a4 ~8 d
elseif <condition> then' a. S3 @- E9 u2 T
<statement sequence2>;: ^# D5 L7 S0 L: c
else
: M, p: t) M7 s: U5 S* T, I; Z <statement sequence3>;
7 C$ d) }- [+ i- d1 | end;" [+ e5 u! g/ B# g# h$ {8 T
如果分支比较多,用:( E6 R6 N/ R% T
inspect <expression>
6 t, U2 W' t1 k2 e& g" l/ l when <constant_list> then$ T$ w6 k# Q# t$ K2 g* q
<statement sequence1>;
* @/ h4 f: ?" s8 G+ [ when <constant_list> then
& n" m9 Y0 Z5 V, _5 I0 } <statement sequence2>;
! {5 u" x# G5 ?# a ...
$ w/ J* G/ w( @+ Q3 c: L( S else
" B C. t: {2 q# l& b( M <statement sequence3>;
! \+ F9 ^9 p( e" W# \end;
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2循环语句: o) j" [" @# u% O( c' y
(1) from <statement sequence1>) S m8 W, g( A$ E s
until <condition> loop
+ D; x6 @1 T. z/ A4 h& P" p4 I <statement sequence2>;
" @5 i* h8 }2 W' c end;4 q! i& {5 L4 ~' k7 y" m( n
(2) while <condition> loop
5 p: \' i$ A$ Z' C! E: \& { <statement sequence1>;
! V( `% d8 D5 S- x: c. q end;, H" n. D3 ^, `1 K. Q$ N0 j% h. I
(3) repeat 5 u3 i5 A. g* E) x
<statement sequence1>;4 i# S+ L6 P" \1 c& j1 n9 v
until <condition>;+ Q% C/ O! z! m; a, h, \
(4) for <condition> to <condition> loop
P) x, W k8 Z <statement sequence1>;7 |, \; ?# C% x: F4 Q! \$ `
next;) ^) T& b+ g$ I6 i1 P. }
3中断语句
. k: a M3 b, l- E waituntil <condition> prio <integer expression>;# X' x S4 M# a9 ]2 g& O4 A
0 z. v% {& _+ s, N2 G; n* Y: ^1 D6 ~1 H! W" I! S5 {& K
以上为常用的函数!
7 [6 ~/ S _4 R2 c/ j8 `还有很多,如有需要我把资料发到你邮箱里 5 V, A7 \/ A8 G- | J9 U! g. J# f
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