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发表于 2012-11-13 08:48:12
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1判断语句/ Y/ O$ k/ ?2 s9 {& v4 i6 i
if <condition> then/ [# Q \; k v
<statement sequence1>;
/ p& z3 u3 I: A& c9 I2 j) Z elseif <condition> then
8 F) `: B+ c. e# j3 Q <statement sequence2>;! {: p4 q+ ^. H: ~: _
else
! l% D& z# w: ]: R) W) B, k <statement sequence3>;
8 o* Q6 I! _2 O" F7 p1 ^, x end;. ?! a0 g2 \4 N ]
如果分支比较多，用：
, [8 C/ h8 b" @) U+ U7 W6 i inspect <expression>
2 y" @% g7 {0 h: e0 Q% g3 U, w2 P when <constant_list> then
: r t N/ p6 ? <statement sequence1>;
" T4 Y4 f8 @' ^- I when <constant_list> then
2 ] B: m: W: b. ^5 Q p <statement sequence2>;+ z! y! ?% w0 d' \
...
! D- P3 o4 ~7 G/ k* q else
4 F& c- r9 t. N K9 M4 s" U5 F <statement sequence3>;) e3 C6 n) [. Q5 }1 m
end;
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2 I$ F9 I+ p4 |, R& ]1 h0 `2循环语句 T# h) Y+ E4 I" k2 { Q8 J b3 I* `
(1) from <statement sequence1>
$ I1 o' h: ^5 n- q' ?- d" b until <condition> loop2 j9 X/ l# k' Z0 u' A5 y) m
<statement sequence2>;
* S" E6 H# z( C: s' m end;( E' J/ X. T4 E& `# ]3 O& n6 H; C! w- }
(2) while <condition> loop
8 s8 n2 \, d+ e$ H& c/ O: K8 @, l- N <statement sequence1>;
. d: y7 @; \" _/ \1 I; ] end;
8 V4 G, ?. [! r2 c# o' j* A (3) repeat
1 n9 ?1 D0 z2 E9 `; E0 ~ <statement sequence1>;+ [* Q3 J2 v: P
until <condition>;. P1 Z& l2 ]* C3 z) k! l$ Y
(4) for <condition> to <condition> loop# S* ?+ c& i/ K5 |6 y
<statement sequence1>;( z: p8 L+ B$ I
next;2 _0 C- Z( k ~2 i7 b
3中断语句' }- r/ T3 X1 d5 }/ M9 v3 U
waituntil <condition> prio <integer expression>;
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以上为常用的函数！
4 a( Y7 C* F& x7 I还有很多，如有需要我把资料发到你邮箱里 2 c! d: J& a8 T' d2 H4 Z
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