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发表于 2012-11-13 08:48:12
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1判断语句/ R# ]4 A. x" W u' K: ?9 w7 j' _
if <condition> then! C5 e8 M9 G+ Q4 ~# F0 d$ d
<statement sequence1>;6 f+ z% W9 b) Q- ~( r# Z
elseif <condition> then3 v' P* Q& w/ Q
<statement sequence2>;
- n2 D8 T% F/ ?. M else
4 ^# Y0 a3 [+ M6 I! O' K <statement sequence3>;
& E5 _& s/ c9 c# x4 i" T end;
: l B1 N) p, J如果分支比较多，用：. f$ \) q9 _+ r
inspect <expression>
! T- u5 d, ]8 c" Z( v6 X when <constant_list> then
4 k0 i4 i9 O3 ^, j0 r. d( h <statement sequence1>;
+ H' D. l) U5 a when <constant_list> then- }1 t" `3 T5 v1 `& w! s1 z' Y
<statement sequence2>;
; G" {! I3 g, A: ~# B. H' Q ...
6 P7 ^4 X- a( j/ H* Q else
: i8 }! N4 z" _7 d <statement sequence3>;6 m9 Z" k. u( P: y
end;
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2循环语句
- m% _( z. H |# o2 Q# g (1) from <statement sequence1>
$ @- k( l" x# O( d until <condition> loop
% T" t B) _5 b6 t <statement sequence2>;% |" X" \3 u7 }+ U1 k9 J
end;
/ R# Y4 L" W5 G! }6 l& A) C (2) while <condition> loop0 {* A& J- x6 ~$ p! m
<statement sequence1>;
* U' A% L% Q* W: b" b L end;" M4 I) S% m P% r/ a6 Y
(3) repeat
# ~% d' i: ^, `/ f4 E <statement sequence1>;
$ M7 s$ Q0 `4 Z3 ^* N until <condition>;. {6 x/ v N! F1 |" V
(4) for <condition> to <condition> loop
3 l% p- G5 ^/ M* b! p# s+ N5 { <statement sequence1>;
4 b4 f, k$ E* E$ r& F9 `' | next;( t4 p2 p8 C/ h3 y, D
3中断语句
" [% E0 _. u' {+ Y# v- a0 A- F, t waituntil <condition> prio <integer expression>;8 M5 D( [* W, W( s) @
2 c& s, R5 _# |% V4 a% u1 Y
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以上为常用的函数！
8 M6 T! _* r3 w" Y还有很多，如有需要我把资料发到你邮箱里 . P1 p7 {* ~3 q8 H$ G, n
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