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发表于 2012-11-13 08:48:12
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1判断语句6 k7 l, x7 K: Q- ~3 H9 q9 [5 Y
if <condition> then& B: _: F( F' V2 H1 ?; p5 [
<statement sequence1>;
3 J% w y+ I8 h( H) A& O elseif <condition> then; f1 ~) v6 O. _, f6 ]
<statement sequence2>;4 i# @$ @, `) h6 T* z* L
else . D2 G. {* N- L1 s
<statement sequence3>;- u* F0 A7 n N2 d; f
end;$ x) H8 v7 j- G5 U9 t0 {+ U
如果分支比较多，用：
6 ]/ Q$ h& K7 j% S inspect <expression>! R6 v0 b& i3 D
when <constant_list> then
! p" J3 O( k8 v; {4 C1 q <statement sequence1>;, \, r" r: B, K6 x
when <constant_list> then$ [ B m! \$ w# c9 P/ E' U/ b
<statement sequence2>;
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else
1 I! D0 _& s5 A! A. `6 B+ ^& T <statement sequence3>;6 Z" D9 z4 V! C. x7 e
end;8 j" E6 K' S& ~/ ~, T Q
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2循环语句+ k* h0 C. E$ s9 ?2 x4 u. C& m
(1) from <statement sequence1>- K6 }8 R# M, s4 P5 ^4 g0 z K/ v1 |
until <condition> loop' N/ q7 j+ _" s: v+ g
<statement sequence2>;
" q! b' `9 @& {, a9 F end;
# w* P4 A" ?9 P# g0 ?& U (2) while <condition> loop
$ Y5 }6 z) _# d& F& j, k4 O <statement sequence1>;$ x- J- ?! b5 j' g% t
end;4 f2 S5 w( h1 j7 }. L
(3) repeat , V0 B+ M5 a( `) y& r( l7 Z
<statement sequence1>;
9 u3 |, ~) T; L" `2 \ until <condition>;/ Q$ L: s4 x: [/ E9 r
(4) for <condition> to <condition> loop
, U6 v, h/ K( a7 N <statement sequence1>; j. t/ |$ a! `* t
next;& r9 g T3 z( `8 N
3中断语句
9 ?/ z$ w2 ]* H3 U9 d+ ` waituntil <condition> prio <integer expression>;
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9 f6 V! K; U8 l以上为常用的函数！
2 L9 V& E- _6 i" Y' M: }% u还有很多，如有需要我把资料发到你邮箱里 % e& F: J2 ^. W
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