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发表于 2012-11-13 08:48:12
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1判断语句
6 B, A* W9 H: v* ]4 m if <condition> then
7 j$ N0 [5 T& d# X# h% X7 } <statement sequence1>;
7 Q+ e. \# y" z* n3 } elseif <condition> then! u0 f8 r2 e! Z0 _5 L7 V& S( h
<statement sequence2>;- j% I9 c8 U0 C2 u! D1 M6 }
else / Q# W+ Z1 ?; _0 w! M
<statement sequence3>;8 E! o }5 Z+ T# z- i' E+ \0 i
end;) q$ i3 q4 g- B$ G, y1 z5 C7 s, w
如果分支比较多，用：
- p' y% \2 h; x$ k" c! i6 l" F/ ~' o inspect <expression> F+ h8 i; D9 K/ p) ~5 T5 m
when <constant_list> then0 ]* |$ N, g/ z. ^" L5 k
<statement sequence1>;
, i: a: U% j) v" ? when <constant_list> then
i* L2 E R5 w0 l <statement sequence2>;/ R# R+ ^7 k ?
.... x; Z' c) A# ^( Y
else
+ p% Z9 y) ^% M8 b <statement sequence3>;
}7 ^# ^+ Z$ e3 v Cend;
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9 N. ^0 q: p$ b2循环语句+ w9 M; j- Z* y# O m$ C
(1) from <statement sequence1>
7 P0 E( k$ `' Y" s- \ until <condition> loop
2 [" w( W* C$ J7 n- {9 ~/ r <statement sequence2>;8 ]; j; |3 G ]4 d& ?& m
end;. U- g4 T+ B4 ], K: B9 U$ n
(2) while <condition> loop
1 D( l% Y/ V7 Z6 B/ | <statement sequence1>;/ X3 l0 e/ O3 Z
end;" Z5 l5 _. L1 O$ F7 `* y
(3) repeat 1 C: j h# B- S4 K) A
<statement sequence1>;0 @7 G0 C' \2 Z; L0 v4 l' O+ G) v
until <condition>;
5 i; a- L; o) @% J; S( `0 c+ g (4) for <condition> to <condition> loop
( ^# A$ L* V* U: b4 O: z' f c( j <statement sequence1>;
. Y. h: G* T" q8 S; i; v5 G next;9 O, z8 L* |. v: t$ x
3中断语句! N5 N' V2 ~) L
waituntil <condition> prio <integer expression>;
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以上为常用的函数！' J _/ a2 Q" n5 V3 i$ X+ A0 |
还有很多，如有需要我把资料发到你邮箱里 3 k; n: Z& T/ y8 `$ K5 p. t
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