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发表于 2012-11-13 08:48:12
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1判断语句( m1 T% i# k! c) U! O. B+ C! ^4 E
if <condition> then4 u/ m. I0 N* p$ C8 Q
<statement sequence1>;
) t! I+ F @$ e2 X elseif <condition> then
* M9 h5 w' G( o6 J( X/ k/ [ <statement sequence2>;
& x! ]" m+ G" n/ E% N { else * F, l) _) v9 e4 m$ D! B
<statement sequence3>;3 J6 `& ]9 O1 k( G
end;/ P# ^+ E, E) ?8 I* B5 |
如果分支比较多,用:
* n& T% O/ d; t/ G: P% F3 U( M inspect <expression>5 g+ C' B+ ~4 d1 z; m. m0 [
when <constant_list> then1 U" l+ d7 U# i P4 ?" y# q
<statement sequence1>;
\& C3 M2 S2 W5 N0 H. H; f9 t when <constant_list> then: Q+ I- n% {" P; B, a
<statement sequence2>;
3 I( R' t$ C$ ~" n ...
) w. m2 h! [- k else
8 B# G; L# N8 _* N; w# a <statement sequence3>;
/ Z' T( x5 ^* c9 O3 gend;+ V) J% b/ H4 v: ~
, u+ j5 z- D- S. \- X' p2循环语句0 Z/ J+ [* M3 y" _: D7 U/ Y
(1) from <statement sequence1>
j9 j3 {: Q2 }( x6 R until <condition> loop J' C# k+ a; _( v: r& n) M$ Q! M5 G, Z
<statement sequence2>;
8 f) t% j. R' ~6 J end;( P0 z% R( V( J& E, r: g/ j) e- o" M
(2) while <condition> loop
2 Z. o: k: H4 `1 M <statement sequence1>;
+ W( J9 w1 d9 q" ?# H end;
9 {1 ~) X4 u$ e8 G% G) m2 r: D/ p% ? (3) repeat 0 v( D8 T2 L$ B8 A
<statement sequence1>;% ~* s+ D6 w$ T" H. y7 t
until <condition>;* j, ^) D) |% O! ]
(4) for <condition> to <condition> loop* g* S9 ~' a6 @" D, L2 @- R; d
<statement sequence1>;+ c, H+ h! D4 |
next;
$ w2 n/ x) e3 M5 E3中断语句
# k3 g9 J0 k S' Z' c8 i# ~ waituntil <condition> prio <integer expression>;1 H( w3 C4 S: W' P- N) f
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以上为常用的函数!
, H3 e5 K9 Y Z/ w, ~还有很多,如有需要我把资料发到你邮箱里 # [6 ?/ T, {+ s7 O* H9 g3 f
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