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发表于 2012-11-13 08:48:12
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1判断语句3 D9 \) e3 d' Z! O+ ^7 Y) s
if <condition> then
: z' g: c( |5 z9 r <statement sequence1>;
$ g6 P8 B! ? o7 T elseif <condition> then
; o1 S! l* |+ s1 m, t d+ q <statement sequence2>;
+ {# \5 ?# Q m1 I- O3 B else 2 Q8 ^" u! \0 g# o/ q a4 f! L; J
<statement sequence3>;, z- l" q9 r A+ P; Y4 x6 _2 Y M
end;
2 ^& q- g5 { ^+ |' I; z) z9 ~如果分支比较多,用:
# B, E) _6 S: |0 |/ u inspect <expression> d% Y8 R* h" m4 D) c7 D* @7 u, x
when <constant_list> then
7 [# V* l% u) B6 `- p9 \ <statement sequence1>;
/ Y' ]6 {; o; |, R+ f% [ when <constant_list> then
+ a3 }5 ?% @2 q Q <statement sequence2>;: v {5 P8 ?; D3 [0 L
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else1 B7 ?" V: b" }! ]) j$ P: s% ~' q3 G
<statement sequence3>;
2 Q) H4 m. x7 J2 V( aend;: p+ s: K) V# {* H; i [' B' ?2 h
: D3 v) m$ A9 V6 i. A. N# p2循环语句& g% b4 B6 {0 C( U1 X5 a
(1) from <statement sequence1>! ?$ t7 A- ~9 [
until <condition> loop+ G& L+ ~* O* o( _ e
<statement sequence2>;
9 W* P' L. Q9 R$ ^( i( v end;
8 @9 e; n0 g5 @" ~% r (2) while <condition> loop
7 K2 }. u8 S( T0 s' m; @ <statement sequence1>;
+ \; s& P4 `% K6 ]: x" } end;' m( E4 x- X1 ?
(3) repeat
/ o0 `4 c8 @5 }- w/ r9 E) H2 V5 Y <statement sequence1>;# b3 ]0 y" ]6 C/ J+ Q
until <condition>;# j0 t0 ]' W: v) ?
(4) for <condition> to <condition> loop
5 f# U1 Y, l& F/ t <statement sequence1>;5 R, e! O! `% z' O1 m7 N& S: R
next;; X ^' h* s$ s+ F0 K! ~
3中断语句
! u" |/ z- N4 b8 s q: } waituntil <condition> prio <integer expression>;
! C, i# z u, n/ t; b# k; k5 t0 R, |: x7 h+ |/ B* K4 D) o, P
% e( b5 Y3 B3 @3 r8 ^* v以上为常用的函数!' E( ]. s {* I, ^
还有很多,如有需要我把资料发到你邮箱里 % r) S( k. ^0 v2 G
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