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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句
- a, S6 n& m. A* |% H! W if <condition> then% C3 ~7 Y( [5 _1 j
<statement sequence1>;: G) r5 s2 ~/ R1 x- P- i) K, y
elseif <condition> then, n5 }# k! Y4 d( b/ m3 o
<statement sequence2>;! f2 `0 J; |4 L0 I0 } i' T
else
* @, c5 k) a0 ~8 i <statement sequence3>;! }9 v8 }' U$ j4 F$ V6 @( D1 r
end;
# A, a3 e0 V4 g `) }8 R. Q如果分支比较多，用：
/ E! o) \* a" e" M" w: U `3 I9 H9 l4 ` inspect <expression>
* ~3 w t5 t: Y2 ^/ a [6 w" n: w3 l$ Y when <constant_list> then: h1 f( v* q/ q$ v% o, g2 x; K
<statement sequence1>;+ x) u* |( M8 z# w: f1 E, {
when <constant_list> then
8 g6 @- V: x! Z/ Q5 t% ?. P <statement sequence2>;
2 m: @+ f' G: v, ]# |1 H1 n% H ...
* N( Z; z" V T: N5 j else* ]2 r* g) }# B: Q. }5 t5 K
<statement sequence3>;
5 S, i+ A) i4 b3 H8 Y( i; X4 d+ K" Aend;
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7 h2 _( o3 ~4 H( j' b& b. D H7 \2循环语句
3 h: \6 c& w9 I/ _! D9 P: g (1) from <statement sequence1>
; i8 u9 s! t( {# K until <condition> loop1 g& }: K8 y9 r: J$ i' s
<statement sequence2>;
. X9 y* d+ n/ c end;% O/ ?5 R5 F3 j" E6 M. {# |3 x
(2) while <condition> loop
; m: e5 A0 b" _& Y- M <statement sequence1>;
9 ]" f; K' P2 Y+ S8 a$ n* ? end;
4 {1 @! X: R) {0 W# ] (3) repeat ' x _/ d" ?! `3 q* z7 i8 {
<statement sequence1>;) c/ u C* y" @2 E V- I
until <condition>;
% d3 a( D, P2 \$ ~5 j) K (4) for <condition> to <condition> loop* m# L8 ^/ K7 ~& j% ^- f: G) D9 l& j
<statement sequence1>;' J7 g( x1 `! p s+ @! a
next;
( f% a! U& f c! ?9 I1 j9 R1 T3中断语句0 g' U3 g P- P+ A6 B) W
waituntil <condition> prio <integer expression>;
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# y' o: `4 ]. E+ D9 L/ g+ p以上为常用的函数！8 u- O" e) S% H9 S$ i2 O
还有很多，如有需要我把资料发到你邮箱里 & m3 ]5 N l7 c2 K" T, ]$ M# s; w# [5 y6 N
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