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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
c5 \% Y* Y# V5 z6 A if <condition> then: l. g4 ?- {& J4 f: z6 w v$ G$ ?
<statement sequence1>;
( k2 V, N: ~, `( Q, t& i. R+ K8 N elseif <condition> then
0 X, \( ]! l" D& U, P: T, c <statement sequence2>;
; k; V& _( s; P" ` else
* N- @) B) R2 L6 t; c <statement sequence3>;5 o M7 Q; z% D7 }" ?& X
end;6 Q5 |' |; l& D& ] Y0 ^
如果分支比较多,用:9 c+ j0 C4 C7 K: B9 [3 A5 B# j
inspect <expression>; M$ w) A% y9 ?& ~3 ^5 ]
when <constant_list> then
; G/ ]( v% I1 [! L/ t3 r' d1 B/ P1 c <statement sequence1>;% j+ Y" M$ l! x p% b4 d( H
when <constant_list> then% F2 A- E0 ]+ {
<statement sequence2>;3 u: C9 p) N4 h9 D# z
...
# U+ ~1 u& m g. {' H- F1 F else
s: H% }9 k) z" J O* s; r <statement sequence3>;# s) r& l( ^* f3 k) e6 Q( Q
end;' j* l( N; I4 \
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2循环语句8 h4 Z) _$ ~- g, a
(1) from <statement sequence1>
5 W, g( Z% y: F! k until <condition> loop
$ w. T$ Q. b! s: ?" ] <statement sequence2>;/ ^6 s9 D4 H! f& C
end;+ f. M8 n* _, e4 x( o- h1 @
(2) while <condition> loop! f# D( V. A0 v; l8 f( a
<statement sequence1>;
; K; S. n" n2 [ end;9 o: \* g$ T" w! G- }
(3) repeat # K) T8 r- j7 m2 V" v9 [
<statement sequence1>;
# {: d. I* e4 I- ^$ X' U7 R until <condition>;' D# w. W6 w/ @ o! k+ c( }
(4) for <condition> to <condition> loop; o- K/ `* ~ S/ I3 Z0 a! g5 a# n4 q
<statement sequence1>;. i0 I! E5 ~7 O1 y% ?8 f5 A
next;7 j7 q# B; y# ?6 P
3中断语句
/ r) k" T( w2 i4 z, R waituntil <condition> prio <integer expression>;7 j, {) {2 m4 ^' p4 y- \( B
q* U. Y1 f: ]4 M
) |5 x5 C$ k q* [以上为常用的函数!
) o, c, u$ H! j+ X还有很多,如有需要我把资料发到你邮箱里
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