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发表于 2012-11-13 08:48:12
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1判断语句% u9 i8 D+ r1 x- n& C$ \
if <condition> then# m5 |$ d; R( \6 s4 \
<statement sequence1>;1 z# j- j* n% @3 ]( ^
elseif <condition> then! l- I6 c- H. Y0 d( |$ i' K0 l# v4 h
<statement sequence2>;
( r( N8 l' A5 L8 M7 @+ A1 d else ' P1 M7 k1 n+ u5 f5 }
<statement sequence3>;; B! }/ L% m. x5 |7 u
end;
* q$ o" ]3 E. z( _如果分支比较多，用：
. H' q- D& D% n inspect <expression>
: S, {5 l. c: o$ U* g8 m when <constant_list> then
6 r' p' d' a. A3 J! p <statement sequence1>;
7 [1 L1 r5 C) p, O) e! q8 e when <constant_list> then3 k% g; f% u. e4 b
<statement sequence2>;1 q" ]$ z" W; e) X* J" q9 w
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else
2 T; Z$ [$ l9 [* P9 N <statement sequence3>;- K7 z2 v! J1 V' w
end;4 a% o( ~2 {, ^7 w: C4 F) s. l" d
2 g, x# v3 j. W( j" s4 g2循环语句
8 m# n% \0 j8 @8 B8 h: Q" w (1) from <statement sequence1>" A8 _( x8 C. e) k/ ~3 F6 C) {
until <condition> loop% \+ w: y% q; O* ~0 G9 x
<statement sequence2>;
2 }! H2 ?. q0 x, j" n1 `+ ^) A5 o1 E: r9 P end;
4 k8 \2 ]: P4 j (2) while <condition> loop
+ Z' ?$ @( y: E# k <statement sequence1>;3 N3 N* }% i$ L9 g( s( ?
end;
+ x+ Y. O; O$ }0 M$ c (3) repeat 5 }9 G! S9 X- A1 E
<statement sequence1>;
9 a# v7 s& ?7 V# M l( k' \; }5 b8 t d until <condition>;
0 \8 ? Q7 ]+ }0 S( { (4) for <condition> to <condition> loop
* s# Q2 x0 O! l1 Q <statement sequence1>;9 q5 s: ^) {0 |; u
next;
. T. e& t; N* \/ I2 c1 o0 E3中断语句
* U5 b- k. Z: X+ U( M: m waituntil <condition> prio <integer expression>;$ ^! D4 i2 R/ p
$ u& \3 G. O$ z; l
2 x' q7 n' a5 k) a6 }以上为常用的函数！
) b* O% x0 ]+ ]6 H还有很多，如有需要我把资料发到你邮箱里 ; s* L" ?7 m& N% S, L- x8 K
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