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发表于 2012-11-13 08:48:12
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1判断语句1 Z6 r+ h; n: g1 W
if <condition> then3 S( c5 z% p2 g7 y7 r+ C8 {
<statement sequence1>;. ]9 z7 y7 `" I, T6 f) H
elseif <condition> then
. ~1 E7 y, r& U( @ <statement sequence2>;4 t! N6 N0 u9 V& n& r5 i
else
& _7 X2 r/ z: I* M <statement sequence3>;2 z( @& s B- P9 l @8 ?. f
end;
/ Q! j+ p% P$ d" D如果分支比较多，用：
- [) `9 Z0 _1 t( v. n$ p inspect <expression>* f* U; C0 j: {8 { g' d# B' @' Z# a; n
when <constant_list> then
! {+ E/ Y* y4 C$ p0 J! f <statement sequence1>;
Q4 B" G. a) p1 |4 h* } when <constant_list> then
" Z+ c; f$ U3 F6 z) m1 B# @ <statement sequence2>;, L: M% x y4 i- W# [
...8 j* u1 v' }" m$ L
else" X* Q" k3 A7 c+ E# R
<statement sequence3>;
/ m3 j2 \3 a/ g5 c, kend;
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2循环语句8 a7 t! Z$ L. w8 I
(1) from <statement sequence1>* S: ^7 L# s9 u% y
until <condition> loop
) N) Z9 H( ~6 v8 L/ ]! u7 S <statement sequence2>;1 I# q1 u6 p1 o4 r
end;
/ e, `- G) h+ Y5 H# } (2) while <condition> loop
, H8 O! w2 a F; Z0 I6 @& W7 Y <statement sequence1>;
/ s I8 |7 L8 g- [ end;8 e0 M& \$ M$ g3 _
(3) repeat ; T: K/ V( v [7 A. Y: Q7 o6 N' K
<statement sequence1>;
4 ^2 _4 t' C* ~/ G until <condition>;
( b6 e/ K S+ @' C (4) for <condition> to <condition> loop9 ]& T2 ^$ s+ `0 i& [+ X8 L/ j
<statement sequence1>;
1 \1 }: n0 y5 ]" g$ i next;
- |: T- x# [& _" V6 y3中断语句
. u6 |" z* l% B& ^! F waituntil <condition> prio <integer expression>;
2 `4 C, L( ~" O, r+ |" [8 u4 U H" p
x3 K! ~$ Q- v9 `以上为常用的函数！
* s+ Z, I4 M7 r0 u+ L还有很多，如有需要我把资料发到你邮箱里 9 R' v* k8 P6 r5 h4 S6 ?$ H; ]: l1 |
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