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发表于 2012-11-13 08:48:12
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1判断语句
: B2 D& d' ?* U+ X0 n8 V if <condition> then. r3 | G8 m( ^
<statement sequence1>;
+ K9 v5 C4 `; w0 H: a elseif <condition> then
# y% {$ Z. @+ G; P) G <statement sequence2>; h3 y; v2 V$ K- ^) u0 T) B: G+ y
else
5 z4 u: b9 X$ r, G. z, k <statement sequence3>;* ?+ b* W0 P! A- N: B
end;% }! {% }# p: l: s- \2 i# t" L! e
如果分支比较多，用：
; O; u! y# l2 z- g inspect <expression>
, [) _+ U% }7 v2 @+ [$ @9 [ when <constant_list> then7 o" b7 ^- n6 P* ^, i# y5 @
<statement sequence1>;% }5 u8 u5 w/ C' b; j
when <constant_list> then0 C# `8 |$ C' V) s. j
<statement sequence2>;
! P$ W) i6 E6 D+ R, f9 ~ ...
X" E% ]# O7 \% J) _ else
/ t+ r6 l7 @) ]+ \) z <statement sequence3>;
+ r, y- v8 h! N/ h3 ?* bend;
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2循环语句4 U% ]! r1 s; }" p- H
(1) from <statement sequence1>
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<statement sequence2>;
( C8 g' c& r- S7 w4 }. Z, v end;) p2 A0 E1 h* r4 s
(2) while <condition> loop
1 D7 U0 j7 f* i8 _ <statement sequence1>;
' l' U! x1 X: I3 j2 [ end;: [; w; B9 f1 J% V2 n3 [3 R; X
(3) repeat , w2 R# A. d9 l# A, p; p
<statement sequence1>;
6 H2 x5 y) v- } until <condition>;
- Y! H" W1 `! I+ I( m (4) for <condition> to <condition> loop: z' I/ M2 L0 a8 S/ A$ q/ n
<statement sequence1>;& C5 M J" a/ s% M
next;$ ~& J, K8 g) l7 U' n
3中断语句0 v# Y& `' s- F' }& m0 Z7 R0 c- J% r
waituntil <condition> prio <integer expression>;
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以上为常用的函数！
) z k& U4 {' y还有很多，如有需要我把资料发到你邮箱里 1 V' `) M6 C/ s! |- N
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