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发表于 2012-11-13 08:48:12
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1判断语句& v" W! u, i6 @( ^/ N. F% S
if <condition> then
- S- C- [3 D$ K& @8 L% i1 d2 ~ <statement sequence1>;/ K' S+ g1 J2 g% s
elseif <condition> then
# a* f/ X' a1 g3 I) A; p <statement sequence2>;
# G2 {6 q) A4 f P" ?8 t* @$ W/ Y else ) z4 W; r0 ~! S$ o z6 a! z
<statement sequence3>;& D g( p% h' S* D6 G
end;
3 c% z3 m I4 K; G% N如果分支比较多，用：
8 G4 L/ _9 o$ E% ] inspect <expression>; D! e- M. L* t. N) x$ w
when <constant_list> then
( R9 A5 l1 I) S4 n0 D <statement sequence1>;
& s: {$ G0 X8 A when <constant_list> then7 B/ m. o4 [6 p; c) W; U7 q6 ~$ I
<statement sequence2>;# A7 V# D6 R# O8 S
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else4 I/ k' ~1 w! D2 ]! {
<statement sequence3>;
4 t2 D- }6 @$ _end;- M. k6 ] R, C z/ a m# M
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2循环语句6 d0 f; D/ B7 \+ ^, c2 c/ ^& |. u
(1) from <statement sequence1>
@" S+ Y% n4 S until <condition> loop
* K! F2 K* {5 y <statement sequence2>;. o- F7 Y4 x4 y
end;8 A& r2 R/ X3 y. r$ h9 K: C+ q; d! L3 l
(2) while <condition> loop' L& G; {' C! s4 Y a- z
<statement sequence1>;! O, Q$ ]) m! e7 X
end;* r# P+ D8 K5 P
(3) repeat
# B$ E |; K! p V8 K <statement sequence1>;8 h+ d! c" L) h9 ]
until <condition>;. h. D% V& G3 c
(4) for <condition> to <condition> loop
! b0 A+ J; i9 \; z! l, k/ w <statement sequence1>;
?' ]" Y% { b6 T! ] next;3 D0 E4 Z+ C) [, h' N6 Q( r2 ]5 w
3中断语句& }4 i3 N: }. f4 `; w# V; J
waituntil <condition> prio <integer expression>;
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以上为常用的函数！9 D; x5 P9 r) V2 Y8 @" P
还有很多，如有需要我把资料发到你邮箱里 0 }3 K0 r1 z: j7 Z) z
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