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发表于 2012-11-13 08:48:12
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1判断语句, `0 x) |: f5 P' P. x2 k' x
if <condition> then
5 f; X* P$ d1 T" Y' x <statement sequence1>;/ q$ I: {/ P+ y9 T' k3 A
elseif <condition> then
9 ?# t% P1 I9 x, Y6 @ <statement sequence2>;
: c* r6 }4 _! K3 K# o7 {$ W, Z: `6 V, T% ` else
! b0 ?8 q, D8 f% U <statement sequence3>;$ O( `: l; F. w' W2 `, a
end; W* R) T. O3 c* I/ ?
如果分支比较多，用：
! e. i0 Z# M& { inspect <expression>
: P5 c( @3 s6 J6 {4 G: h when <constant_list> then u3 t$ ]) J- o: F1 ?2 g4 h
<statement sequence1>;) t) z5 `; c! y; A
when <constant_list> then
* ?9 ~0 t1 f" [$ ~; F <statement sequence2>;
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else& ?) [; L1 u s
<statement sequence3>;+ N4 O+ _) L/ H+ ?; i3 x
end;% _% b# w, `# t( w$ V
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2循环语句9 s+ C, [* ?! o' E' |/ h y# Z
(1) from <statement sequence1>( t& d4 g: j/ E$ W0 R% t
until <condition> loop/ u+ W1 r( k! j$ F. s
<statement sequence2>;
: M7 z& H! [- }6 [! c end;
1 L5 [$ i3 k' R3 B (2) while <condition> loop
. ?. ^$ J* |' J* @5 J: T6 K( \/ q <statement sequence1>;
9 j1 F# A5 a- n; k- |& C) g end;
* v7 m, b7 b0 M (3) repeat
) O& t+ ~7 _- B <statement sequence1>;* H/ ]# e) v, H' j9 F1 X2 U& o
until <condition>;
; T |6 f$ }2 a+ k1 b8 l (4) for <condition> to <condition> loop
7 N; Q& a8 F% M <statement sequence1>;% \. p% X! {( o/ n( s& F
next;
" @4 x2 D V" `3中断语句
$ l( ]6 V" h0 L2 A waituntil <condition> prio <integer expression>;5 l/ e6 j9 K3 U& o5 m- S. g2 w; z
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以上为常用的函数！% k" O; i8 }& z3 D* u
还有很多，如有需要我把资料发到你邮箱里
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