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发表于 2012-11-13 08:48:12
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1判断语句6 ^+ p% ]) l9 `) J* S
if <condition> then- A& l& ^. _% _
<statement sequence1>;
4 v f' S6 R7 _- S; {6 Y& Q+ M elseif <condition> then
4 A* y' `+ B2 O4 J <statement sequence2>;
' }( n, ^* ^: a q1 c1 c' N0 C else
, l2 i9 i5 I! ~1 q( U# x* W8 ~1 R <statement sequence3>;; i! b, y. x- r
end;+ w6 I, O0 J5 H, t+ j) ^
如果分支比较多，用：
% Q' ]" P- W+ v$ G S8 B inspect <expression>
4 Z/ {& t/ T1 ]* ^$ X4 B7 C0 Q when <constant_list> then
* l+ N5 z' I8 i4 B) ~. [1 ^ <statement sequence1>;
7 O6 J/ y0 J8 f when <constant_list> then1 Q- E, Y/ s2 c) {* z. w% p# T
<statement sequence2>;
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else4 g8 f# y8 t* f) r; y6 ^, l- y
<statement sequence3>;6 o8 m+ t6 f6 q2 X+ q
end;
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& G$ {$ G$ V) j2循环语句! G5 C3 S$ J, R) ?( ?
(1) from <statement sequence1>
2 N# B% R) W: `1 D- }1 d. C9 b3 e until <condition> loop
8 \& B( l2 f: G, {* a <statement sequence2>;
% ^" ?3 i/ ~. o1 @% D4 A1 g end;( I, H* n2 k% H
(2) while <condition> loop
# m- B2 u- t$ C/ Z& `) W <statement sequence1>;' D! ~- o7 k, w% L7 m0 `$ I9 Y
end;
O+ [+ d7 k% V5 x$ v% S (3) repeat 5 f: W1 Y e) d5 i
<statement sequence1>;
" s6 E+ P& v- ~: {7 a# X until <condition>;* A5 v3 b9 S9 u5 \! Q
(4) for <condition> to <condition> loop
5 b t, R2 A6 h4 y$ \; v <statement sequence1>;$ t6 X4 I* y) m0 e7 i( |
next;
! K: e; g, H2 a' O5 R6 X3中断语句
# s+ F5 | N, @& l# g* } waituntil <condition> prio <integer expression>;
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3 @0 Z4 n, u% g" r. c; y1 S以上为常用的函数！+ y: t2 V N& j) N
还有很多，如有需要我把资料发到你邮箱里 $ e" p/ v" F, Y
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