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发表于 2012-11-13 08:48:12
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1判断语句3 t3 _" |# X& Y% k/ Y
if <condition> then
8 h: H& J8 i3 H3 W: R' b2 G! ~ <statement sequence1>;
2 S& m4 r4 t6 i) c% z' Y a elseif <condition> then7 Y9 z" f7 }& m/ Q, i1 r
<statement sequence2>;
5 A) X- p# L3 q' S else 7 N0 B% W2 N- W/ x( b& G ~
<statement sequence3>; a7 N' W' p2 k# ^
end;
T. g; \# o$ y4 g如果分支比较多，用：
% h* Z2 B7 ~1 f; W l inspect <expression>
- I/ p9 N8 {. K- Z when <constant_list> then
- I6 ~7 w# _8 R0 z7 G <statement sequence1>;
6 r5 {+ j( |0 F# v when <constant_list> then6 i. u( c) O6 }6 T9 z5 k. L! s" d7 y4 y
<statement sequence2>;& h# Z- R5 _: Q% P8 _: c
...
. }3 f. l ^/ u0 `" l else
: b! U; c3 ~. s+ H% `/ ]) ], U <statement sequence3>;
( X, s0 b- Y" i0 o( `end;
# u3 x, ^7 O5 J/ W. b
7 B4 M, `1 @) j5 C6 Z2循环语句3 W S: g" A) H
(1) from <statement sequence1>' |( V8 z7 Q3 c5 j& D
until <condition> loop
: ?$ J% q9 n3 H4 s: k <statement sequence2>; g: k8 x. G- a/ e N
end;- k a* B0 \3 M% T* F8 o( e
(2) while <condition> loop8 b# b' X8 F! f+ T, q
<statement sequence1>;, o! x( n, j( M1 V8 `3 c% d- ]; f
end;, |2 L r9 ]& _5 X* F6 o# l
(3) repeat
1 g3 z, a \) x, P& _ <statement sequence1>;
* i: W: H" i5 ^- ^, T until <condition>;- ]" Q* I- E& {) Y
(4) for <condition> to <condition> loop
- ?2 P! {$ n/ V9 E% u8 Z: m" n" \% ^ <statement sequence1>; U0 q) a7 y3 O2 A/ w: f# Y, I
next;
7 j4 P! F: ~7 l/ _/ q# s3中断语句
3 j0 m) L6 K4 ]9 o- z waituntil <condition> prio <integer expression>;7 n3 l: m3 q; E; k
3 A4 ?8 P1 o& C$ y1 u* A3 M, {
, Z7 K. `' ], d1 ?5 j. i6 a8 {
以上为常用的函数！
5 E+ j2 z6 E4 R0 V% t9 c; n还有很多，如有需要我把资料发到你邮箱里 1 d, a5 C3 P, c$ w1 Q
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