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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& y6 \0 M2 B1 Q, d# ~ v
if <condition> then' `5 h2 d i8 f# Y. w( v' V! G
<statement sequence1>;, _: R3 b( S8 l0 H) k0 I- x$ y7 t
elseif <condition> then
6 p/ T# F1 M" i* n, |9 w8 A <statement sequence2>;
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<statement sequence3>;% m: d5 R) X0 `1 _3 h' Z+ x
end;
' W" @& P" y7 j7 N5 X# J如果分支比较多,用:
* K3 P) y, C* ^4 J x inspect <expression>
2 _$ k* M1 `* j when <constant_list> then
) a3 {- T: P( o) @; C. U <statement sequence1>;1 ^2 D9 W. t, h5 }
when <constant_list> then! m8 v' Y7 }" s2 h4 f$ b2 ^2 j
<statement sequence2>;
5 o; r# l- @# I, i ...
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<statement sequence3>;0 Q0 V4 p7 h7 u
end;
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+ [5 Y6 h ~1 J! w2循环语句( P: ^7 e2 l3 D9 C
(1) from <statement sequence1>( r5 W5 w9 C" l9 D2 j% x0 u
until <condition> loop- R" p3 [( L: d- `6 ?8 N
<statement sequence2>;: C+ T% j' t ~7 p7 E3 a
end;
6 x# }. w2 X, P z- R( K( M (2) while <condition> loop+ B( J8 I! o+ P8 z2 X$ S
<statement sequence1>;
. h; O5 k: Z/ K! L) o H; } end;2 z9 U! V+ @# d7 y: o: m M0 m
(3) repeat , T% m$ h6 }& F
<statement sequence1>;, L8 Y& v7 Z' H4 N5 j/ n
until <condition>;3 b. ^1 t5 \# t( Z$ E
(4) for <condition> to <condition> loop f: Q A3 G/ \. Q! ]8 u# b& V5 ^
<statement sequence1>;$ g1 M; I8 f3 N. h) H' U) D* R- _
next;4 e: G$ u/ ?6 d2 Y) {, i. u
3中断语句
. ^+ }9 @% [; M8 M waituntil <condition> prio <integer expression>;
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以上为常用的函数!
4 b- }% K$ x- J j8 C还有很多,如有需要我把资料发到你邮箱里
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