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发表于 2012-11-13 08:48:12
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1判断语句6 S# M6 U! g1 ~
if <condition> then- H; n( J9 B( ~5 }
<statement sequence1>; r+ Z; }9 I- G# f$ z+ J) `
elseif <condition> then
' @. U" v& i# e) [ <statement sequence2>;
J' l4 J# x+ c' ^8 f else 8 m* d2 M- z4 h
<statement sequence3>;
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如果分支比较多,用:
0 l6 Z1 C, w# Q: | inspect <expression>: w4 V; a5 x( L; j. a
when <constant_list> then
9 v z* z9 Y$ x; Z2 x <statement sequence1>;
+ v: E2 m3 X& l2 k9 G when <constant_list> then, L( `/ O/ _' g5 ?* I
<statement sequence2>;% ^7 K) a% W3 j/ s' _
...
7 R1 P) a; M# y( |7 k else
7 b/ p; n( ?; C' Z' o! m' k- f- |+ j2 e <statement sequence3>;' A5 |* `( C! s) Q z' l
end;/ D! m! d* B+ J K
; F, `- O5 u, @) }+ ?2循环语句
7 \1 D+ s1 O( b3 S (1) from <statement sequence1>( c' _+ v( N! \6 H p
until <condition> loop; a" g0 V: k' M5 L! ]
<statement sequence2>;# V% Y" R$ G$ P4 u. {) f
end;
& m$ ?+ w* k9 A. B7 w7 O4 X+ Y2 b- B W (2) while <condition> loop2 o" I6 W0 c, q
<statement sequence1>;
, D6 P3 t A' b8 A% I1 e end;
' A. g& o8 v$ I9 {. C1 I3 l (3) repeat ( k) s$ R- |3 i+ Z1 p" K
<statement sequence1>;
4 U5 j, j- @2 I$ Q0 Q8 i- u until <condition>;' c& |7 B- v- j. z1 E
(4) for <condition> to <condition> loop, }3 R" Q6 a' \ L/ y- N* o- ]
<statement sequence1>;
0 r+ @! F! N9 g next;' a4 L7 I/ Z1 W6 Z: M- u3 g V
3中断语句0 P; t; o2 f! p# u! T
waituntil <condition> prio <integer expression>;
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以上为常用的函数!
8 @& G1 k' v6 m还有很多,如有需要我把资料发到你邮箱里
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