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发表于 2012-11-13 08:48:12
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1判断语句. ~: Q1 h2 d* N5 U3 G ?9 n5 O
if <condition> then$ w* i, X; h7 g) e$ @* R) m
<statement sequence1>;0 v0 w; T2 d6 O, y6 l# b$ l
elseif <condition> then
?$ D$ B1 f0 G* Q3 v# d <statement sequence2>;
. u) H1 {9 L% m) _- u else
# O# O4 C# @3 Z- Q. x& j <statement sequence3>;* g& B I* S) q; e# j, F" V
end;9 O$ T% f6 S! _8 O% w0 ?$ L. A
如果分支比较多，用：) W, k% x2 K5 u( m
inspect <expression>
7 F; {, L6 L- m' P+ b1 G: E when <constant_list> then
; w( u" j" D: q0 x+ w <statement sequence1>;
8 r& u" c8 M% O7 F5 T when <constant_list> then
: @' o% T6 Q" M& }" ]2 s <statement sequence2>;
, n+ h4 ?# G) @6 f& q ...
3 |; S1 K6 Y' H6 V' P& H+ A, X- o else
; [- A+ Q" D9 V; U( Y# W <statement sequence3>;8 f6 M6 q( F% K, K! C2 f/ D3 w
end;
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& b5 p: N6 s" D6 V2循环语句" A/ f3 b( H- H7 G
(1) from <statement sequence1>1 a1 j( e" L# X4 y9 U, o
until <condition> loop
) T) B8 O1 e, ~9 C3 i <statement sequence2>;
0 S2 z' q- }. | end;6 K" X; u& U# z! s7 r" ?
(2) while <condition> loop
5 _; g9 {# {& p8 p- Q7 _5 U/ D4 N <statement sequence1>;
$ g+ p# J s) n2 C3 ? [; ? end;, [/ l5 w# a S! N. Z6 y! l ~
(3) repeat $ d6 V9 W+ }0 h: z! n m
<statement sequence1>;
+ u: t& W1 L+ q! r until <condition>;; t+ N& ]3 b8 a. C
(4) for <condition> to <condition> loop
* o( h1 ~1 e0 N+ T. q <statement sequence1>;
) M5 o) g- e( M, j, | next;3 K4 M) B5 L) ]' c$ ?
3中断语句
C& G( P6 J5 _5 _4 T waituntil <condition> prio <integer expression>;' L$ k9 M/ u: h8 V$ X6 s
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2 H' L1 u9 Z+ F; A8 k以上为常用的函数！
# ] d1 v5 u3 ~. D' X! p" e还有很多，如有需要我把资料发到你邮箱里 . b* n. ^4 r9 v' B
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