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发表于 2012-11-13 08:48:12
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1判断语句1 p! ~7 z- \7 v; t4 o i
if <condition> then6 I' H @! }+ y$ }5 r/ ^/ ?7 m
<statement sequence1>;
7 R$ s, Y5 I3 d( o4 n- w8 r/ ^" T; } elseif <condition> then
$ P; K3 W8 ^- A# U+ g$ P" o0 Q( k <statement sequence2>;
0 y- n4 B9 R8 _ else
4 n, ?0 e& t1 A D- M" o5 \. z! V <statement sequence3>;# q- [$ U2 |7 [3 @0 D
end;! L! x! W5 u0 _/ u; W0 O
如果分支比较多，用：
* o5 X7 `( U- K' V; ], Z1 t inspect <expression>
: ?- M: j: L2 B& U& { when <constant_list> then
0 L2 G4 C3 [4 r4 }2 ^- U2 K <statement sequence1>;0 K* k5 [: F) Q* w& `
when <constant_list> then' _ h4 j, A$ k5 @: q3 ]
<statement sequence2>;
% }) X/ X; B! F% A. }1 n% | ...5 h5 T: F- `7 n. u$ ~
else
$ y2 r' g& L! J* } <statement sequence3>;; U2 m- q. z" N0 k+ @
end;
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2循环语句& C" w0 a- i. `5 `& I
(1) from <statement sequence1>: d" ]6 L, v% E7 h, L# r! r
until <condition> loop! [+ `7 u$ r) m; ]8 ^+ K
<statement sequence2>;/ `% p" Y8 G" R5 E/ [2 z! Y
end;7 y# J: O+ |8 d3 v& n
(2) while <condition> loop
+ W$ O# Z1 E5 B! m5 Y8 D <statement sequence1>;
) q) b6 ^' k3 U3 n2 W. b end;3 Z8 N9 }( P; w8 P/ | b3 F% Q" ]
(3) repeat
( w; W1 _) s! T: Q8 a# N* I6 H5 x+ y2 Y <statement sequence1>;/ N0 a" u) }) y! S9 [3 S$ U1 K
until <condition>;
1 Q7 j) d3 H! D0 t* C (4) for <condition> to <condition> loop
: h. }1 ?' T$ L3 a0 f3 q7 J <statement sequence1>;0 b, X7 s. C+ y( }: h- G: f
next;" D" b) l K+ R- G: S6 R+ m$ b* H
3中断语句
3 T# M1 C2 p3 a4 \/ |2 ~ waituntil <condition> prio <integer expression>;
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以上为常用的函数！
& c$ ]9 t/ _' J8 N5 d5 N- \还有很多，如有需要我把资料发到你邮箱里 + [( a! _' f2 u# l! D5 K& j8 Z# L/ v
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