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发表于 2012-11-13 08:48:12
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1判断语句% D1 ~# H: L) P6 V( J5 d
if <condition> then; h1 A1 F' Z) o
<statement sequence1>;
, u) d$ \& i& ^ q* t elseif <condition> then5 S6 Q: m n6 ?5 m0 H
<statement sequence2>;
% E5 x$ `$ ?8 `7 b else
2 f3 s/ J7 r( T- X+ j1 m <statement sequence3>;
i1 Y+ k" e$ C6 n* ^6 y2 \7 l1 _ end;
- F0 u6 u. b$ @: E, j3 W: [$ `如果分支比较多，用：
/ w0 m8 R" L' z inspect <expression>) S. Q9 W: D! ^% o& L
when <constant_list> then) _% s, y9 ?3 w2 ~
<statement sequence1>;
0 n0 z$ V+ V2 P6 [; [1 C+ p when <constant_list> then
, Q: i( ~$ F& _$ Q2 X5 j <statement sequence2>;
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else
7 T( C' F' Y% k. v <statement sequence3>;- L( e* X1 N; \0 n( P
end;! y9 z% e" x5 X
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2循环语句9 B8 s2 z3 r( Q/ X+ J- C
(1) from <statement sequence1>
+ w$ C4 ~1 B* S* g C7 K9 n1 o% u; Z until <condition> loop4 ^; p- u' C# {4 D/ y
<statement sequence2>;$ o s* _& Y9 S1 B1 C
end;" p) G7 x; `" j3 F
(2) while <condition> loop; p! f* g( C. o2 t: o
<statement sequence1>;" R" |: [9 G' U- W) z' V* c% u
end;
_9 q* y+ f6 Q" A8 I- u (3) repeat
$ l! P& q* k5 _; U0 K" f1 _% f* u+ C <statement sequence1>;" \& |/ m2 ~ j9 m
until <condition>;" [$ X0 ^: k7 A$ c
(4) for <condition> to <condition> loop; u: y+ S) R' k4 E1 p
<statement sequence1>;
* B$ d. v- y4 O7 P next;; A: k7 {, J# h4 N9 l
3中断语句) H3 T$ C( b* B( T6 O' R
waituntil <condition> prio <integer expression>;
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, L& ~) C+ C. o: C4 @ _3 m以上为常用的函数！
2 Z/ M- O* L; J% O! Q9 S还有很多，如有需要我把资料发到你邮箱里 ( J# C/ E2 I" b( ^) N
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