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发表于 2012-11-13 08:48:12
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1判断语句9 I4 ^( H' I. s0 D/ n/ e0 @
if <condition> then
" I! Z6 B; {. u3 _6 G: ?/ b2 \ <statement sequence1>;) X) u! [. F1 A6 j$ h* o
elseif <condition> then
) \) d* b$ O' O1 J* R <statement sequence2>;7 u9 V6 p2 ? T8 g- |
else
' i1 ~8 W. ~/ X" D4 a: S+ z <statement sequence3>;
! j+ r; J1 v- E- G: j. R, d( _- O: w; ? end;# q3 I; h0 O( |% y" s
如果分支比较多，用：
9 |# S$ ~4 `% V/ M4 l inspect <expression>
, j) r2 L, t; F0 G when <constant_list> then: G0 ]0 p" \/ \+ Z" ]( J
<statement sequence1>;
7 R% s$ h3 ]" S+ |3 } P N when <constant_list> then
; G. S$ _- Z- O! ]1 L. q% I <statement sequence2>;
+ d8 ?( j7 V) K' j6 H4 \) h ...
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<statement sequence3>;
' b- o. J# K8 U0 g# M/ R! Q4 Xend;+ B" w5 F! ^+ q' b5 V$ b c# F8 R7 `
; }# J+ X" }) {2循环语句7 y+ Z+ z; \ D2 d- C9 J
(1) from <statement sequence1>+ W% p4 W$ x: N6 M$ B7 C, R+ k/ i
until <condition> loop
: I f+ s. [! A* }9 M$ K( E <statement sequence2>;
1 _' |; j; q3 |5 u: Y, O end;
& e5 h; k: i3 O9 G! O8 |- ~! p (2) while <condition> loop& l) E, ?( Q4 G0 d( h" d/ P
<statement sequence1>;4 n4 c& a _, u4 P1 Z8 T
end;
6 @5 p; C* a' X- q0 B (3) repeat , T" C: f5 e' w1 r0 \) k9 S3 E
<statement sequence1>;
. _8 l4 P# b& h8 q9 w7 Q until <condition>;
; N$ J- \9 v9 l# y) u* j2 n (4) for <condition> to <condition> loop" S/ K }) r( K
<statement sequence1>;" z" G; f$ V, M7 f$ A1 P
next;
8 q6 R' y3 b) B8 \8 r3中断语句
Z# l, `. T* P# q5 _ waituntil <condition> prio <integer expression>;
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以上为常用的函数！3 Z2 p d' q4 P) z9 e
还有很多，如有需要我把资料发到你邮箱里 $ b* z7 t3 m! w. u7 S8 v
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