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发表于 2012-11-13 08:48:12
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1判断语句+ o* u8 g! J" E
if <condition> then0 Z5 P* P* z. K4 R
<statement sequence1>;
: w$ M6 X8 C+ q8 r elseif <condition> then
4 h' k, O. q' I3 r+ v$ W$ l <statement sequence2>;
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<statement sequence3>;% H& \4 i5 e2 g7 [5 e+ R
end;* p) g" n7 ~/ I' \3 c$ S8 I
如果分支比较多，用：
9 E6 [2 M/ y9 ~8 c inspect <expression> P* ~8 F0 h0 V' C" b# T
when <constant_list> then
; x* A! M. p6 a+ ` <statement sequence1>;* Y1 E7 n* m. W& F( a
when <constant_list> then* V+ k' V. V! h/ ~
<statement sequence2>;& K; Z' r, j7 e
...
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<statement sequence3>;5 ]) Q7 K8 A. {8 m1 g1 ~. ]
end;
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9 r. @' k+ t% T+ I2循环语句
, ]: t1 D( v1 _; D: j1 e (1) from <statement sequence1>6 P7 E5 d& E/ X3 X
until <condition> loop
6 z; r5 z X J <statement sequence2>;
0 F4 ^; l1 S$ I. M% w: W7 s end;
' ?( O+ O$ D) g" P# @ (2) while <condition> loop, L. |% w# _3 w7 \
<statement sequence1>;$ ~& W0 l7 o! W+ T7 B% d6 E3 ?
end;, z8 B9 u9 ?7 ^6 t& M. _
(3) repeat
/ _0 B, p$ ]& q <statement sequence1>;
1 b4 D. k7 e E6 ~: n: B$ [ n! }- Q. d until <condition>;
) S- z. a8 o6 i$ N' O9 ] (4) for <condition> to <condition> loop6 O1 N; n' I5 `5 n
<statement sequence1>; x) i: T6 h$ y9 \" _
next;
4 R) t v+ n ^& \: Q# b3中断语句
' u# z/ q* k" f8 h5 f4 E waituntil <condition> prio <integer expression>;9 N/ k9 N# w; m- k7 Y) A: q
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以上为常用的函数！; t+ _+ \/ ~1 q. w, r% e
还有很多，如有需要我把资料发到你邮箱里 1 Y( Q; C% B& I) m& p( T a
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