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发表于 2012-11-13 08:48:12
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1判断语句
5 T# H5 B( G' D3 H; F if <condition> then1 t1 u& @ ~! W6 H5 p5 P# b
<statement sequence1>;
' q3 C% E( I$ L& r j, x elseif <condition> then5 B$ l7 t5 c& U+ d1 r$ p( C
<statement sequence2>;
8 _/ Q- L; B" K/ Z0 } r1 S else
2 D7 s- k, \8 C4 C7 N% R, ` <statement sequence3>;: k% G( V5 ]2 f- O. L
end;6 y: U+ Q% L- u2 q6 I
如果分支比较多，用：
! Y {% g4 S, s# `( {! ?# R& y inspect <expression>) b- B6 v, n% i" v! h
when <constant_list> then
: @ _* X; e9 r <statement sequence1>;
0 A0 r, m$ ~. X% o- J2 i! M5 O* U when <constant_list> then
3 I8 I2 L: x7 N' l <statement sequence2>;6 C4 z% N4 o$ Q
...% D2 O! j0 `- F, @3 p+ ]3 o
else
% C' Z* y* g8 ] <statement sequence3>;" {9 T3 [3 h7 K" @/ }: j G
end;0 h4 L; ?1 {1 c9 W! e' @
2 W/ G: m0 G' n2 w2循环语句
& S% c6 u- M; ` (1) from <statement sequence1>( |# M3 U2 A/ I |5 ~8 _
until <condition> loop" A! ^0 Q& E, D) u# E
<statement sequence2>;
* ^ n* ^6 v' N$ h end;
0 [7 e; u: a% h' } (2) while <condition> loop
2 ^9 j; I! V: ` <statement sequence1>;$ I4 S, q" X6 ^) X; ~! Q
end;
0 {' Y! ]4 |! O5 z- M9 R (3) repeat / C$ m+ W- c; d( ^8 H' u7 o- D
<statement sequence1>;
. w, W0 V3 w5 R4 @' T3 B3 P until <condition>;! W2 h3 I2 D8 r0 k9 r
(4) for <condition> to <condition> loop
9 D' r- K* k' e <statement sequence1>;# z4 k1 v S. H6 x+ V4 @
next;) T/ e( Q( A9 s- y# S5 t v5 f
3中断语句% d: ^; ~8 a; E1 i
waituntil <condition> prio <integer expression>;4 S4 S* O5 F& x3 B! v2 A9 d
- O" W' v5 C5 w8 e3 M' S6 z
8 v% ~' Q" ^$ z5 P' p以上为常用的函数！! \1 w( H( z) k5 E7 d! D1 X
还有很多，如有需要我把资料发到你邮箱里 ' f/ I& Q) w, x9 s( @- j
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