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发表于 2012-11-13 08:48:12
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1判断语句% X/ @/ ]0 l; o3 ]3 }2 o
if <condition> then
- e/ U3 R* F, {1 l+ D <statement sequence1>;3 n, _- g6 K7 G. H9 w1 ]
elseif <condition> then' i& k% s' T: q" s$ c$ F
<statement sequence2>;* E9 E2 h( \' z/ p: A
else 7 r& g. [/ A' F0 f% z6 _5 S2 u. ~4 B
<statement sequence3>;
0 e( L7 ] X0 y end;$ U O$ a3 W5 a% t; P% u( u# K
如果分支比较多，用：
5 P/ j/ _' O& g6 O" A) t$ d( K inspect <expression>
% g2 O. C6 g- z* \( _ when <constant_list> then6 D4 B& Z9 l0 a5 V; O9 L
<statement sequence1>;( g6 ]' M5 Y2 u8 k1 y4 K
when <constant_list> then6 u/ K" U V @ z& w
<statement sequence2>; Q7 i! h( T# D' _; Z# W6 j9 M
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else1 ~' q" @- x0 a V6 z- h9 t. s
<statement sequence3>;: J2 {5 a6 G* G) z; d' }
end;# f" ?$ Z- p1 Z+ M8 M5 e2 e* Q5 M
) L5 s8 M+ P) e! S' K2循环语句% `6 ?* Q, Y% D7 d4 n. g; _
(1) from <statement sequence1> g( f' \4 |' j) S* F0 p
until <condition> loop
: j; f. \/ E, [7 u# x. J; m <statement sequence2>;
% ]7 p: V- A2 g7 b( z4 H end;
! O) l# d- R$ N6 f (2) while <condition> loop( u7 y/ b5 o5 I1 j0 s; L
<statement sequence1>;5 b: W/ O% x7 s
end;# o6 p# v" W$ c/ D+ J0 |
(3) repeat " Z( L; B. X) {3 n! h% s8 f0 n- ~
<statement sequence1>;
0 J# o5 S9 c" Y7 c) M, G until <condition>;
/ ~. L/ H- c/ ] R/ r (4) for <condition> to <condition> loop
5 P3 i; B; S- \' l' L5 Z* A3 |" N <statement sequence1>;9 e) k& B m7 ^
next;
' z( |- g; r* k; x3 R3中断语句
* Q. [/ x( F' r# m# i7 l" V M waituntil <condition> prio <integer expression>;
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, V% F# u# ?$ x% D( s2 ?! D6 H以上为常用的函数！
6 X+ M4 y: v" x7 u% w( i4 @还有很多，如有需要我把资料发到你邮箱里 % P" B) g+ J5 f6 u: L1 v0 U
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