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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
' r: [1 B) k5 H# l* ^. u if <condition> then
) \: l7 A4 v8 H) d, C" A$ b <statement sequence1>;
* D6 d: e9 D3 L6 a% D" m# k elseif <condition> then. C2 s6 c, r" e
<statement sequence2>;% G) Y. e+ C1 J; }" E
else - r$ H2 y5 B: q; Y6 j. b
<statement sequence3>;9 c& V0 L$ b- @. j. R
end;4 d& J) a. W" C) Y3 E* J
如果分支比较多，用：
$ F$ L% X% r4 ^! _6 h0 ~5 p/ R inspect <expression>: D( O5 B& d' t* k% l3 ^( |/ ^
when <constant_list> then
' V) S$ s6 T# n. W) k <statement sequence1>;
4 t8 G; }3 {3 ^$ |8 P1 V1 e0 J when <constant_list> then. t+ I" E) ?6 p. Y( \
<statement sequence2>;- S1 Q( Y% K6 O& Q h
...
$ @8 \6 ]5 ~% ^/ J; n. g5 z2 e else
( R; u0 \/ S# ^; @: v7 M <statement sequence3>;! o3 c9 r8 u( Y2 D
end;
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2循环语句
+ t7 e3 v" |2 y; Z: n( K (1) from <statement sequence1>
- F, s: @2 W- x2 B" k7 b! t until <condition> loop, i' F: _/ u6 Y7 o/ k: q0 {
<statement sequence2>;9 _( ~/ f _! j+ D0 ~
end;
& {& s+ z/ ^" ~. @0 x: i9 I (2) while <condition> loop
' Y0 w( h$ H: n! F <statement sequence1>;. e8 d( s/ ]5 ~ ]6 f$ k3 z; R! y+ P
end;# P9 V8 |0 O8 A3 X+ Z, d* l
(3) repeat . {7 ?( K. N- b0 `, j) e5 f, V
<statement sequence1>;
. @- }: ?# Q3 ?1 h) l' } until <condition>;* n; x1 q1 L. Q6 U7 P' C/ [
(4) for <condition> to <condition> loop
, | ~; H& o0 p) t0 S <statement sequence1>;
* O; T6 K3 @+ W next;
7 n$ }: H% B& d; T0 k/ {3中断语句0 T2 K* I) h' d# @
waituntil <condition> prio <integer expression>;
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4 f/ Z% o* H6 }( S8 U7 R" d以上为常用的函数！0 p6 D+ l8 [( N, T }& D, f
还有很多，如有需要我把资料发到你邮箱里 3 E& b, B* N f
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