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发表于 2012-11-13 08:48:12
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1判断语句5 W2 @0 D6 y# M& \
if <condition> then4 K0 Q- l( f0 g
<statement sequence1>;; A, g: P5 w% _* K6 \6 P% D5 k
elseif <condition> then
0 \' f' r2 ^: v' b: e" z <statement sequence2>;
. W4 }* @% G, L, C: B' Z else
( U( w) n# S8 F/ N' W <statement sequence3>;+ O* g5 N5 k# K
end;) L) S/ p4 k# }8 Y$ M, k
如果分支比较多，用：
`' a$ j! L- [/ o inspect <expression>
. c- K' I/ l# R when <constant_list> then" @2 l! |- ` @: {% C
<statement sequence1>;
0 p2 T1 q2 O, e# Z% f2 T/ ~ when <constant_list> then. d- ]8 z' V& O& i- o5 C$ j
<statement sequence2>;0 J( A. f/ O- u. l* s8 ^' b" J' l
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else: t$ @, ~- g: m, ?) D2 H4 ~
<statement sequence3>;
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2循环语句
- s8 C- n1 f+ t% u/ b8 U (1) from <statement sequence1>
. s! w& [6 j( U5 z6 }+ M0 K! C" _ until <condition> loop
* M( g0 s9 @" D& |; Y <statement sequence2>;
) m7 _( F) h5 {7 p% ]" G c$ ^$ v# ^ end;
" D& g! x8 V# @( r# }; L/ n3 ~ (2) while <condition> loop
Q) V' X w( c/ ~ <statement sequence1>;$ Y: k: x; }8 q4 o3 y0 k
end;; ]' h1 o. o: Z0 N& w3 R
(3) repeat
/ N" A! H- k. T; a/ p2 t <statement sequence1>;
* p" R$ l. }& Z1 k until <condition>;
! b. N5 m1 V' I8 S h (4) for <condition> to <condition> loop
8 l2 U8 H0 {8 y1 S& R <statement sequence1>;
5 j5 Q/ K7 ~0 c! G8 q next;! C9 K' D$ y1 X7 G; C/ I1 @) r
3中断语句# C8 ^) M7 p# a
waituntil <condition> prio <integer expression>;
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" H- k$ k9 G. R+ ?- u8 F) R以上为常用的函数！2 I r" {( e6 b+ z. Q; C
还有很多，如有需要我把资料发到你邮箱里 + P7 b1 j {( b1 l
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