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发表于 2012-11-13 08:48:12
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1判断语句" h; l) J& h' \" H$ z! @
if <condition> then
) H+ ~. t p0 S3 b <statement sequence1>;$ J( u: k' e3 r) b
elseif <condition> then
! {5 M S$ Q6 \3 M! G0 L <statement sequence2>;
$ t4 I/ S' g* W else
; ^7 Y5 K* P0 c* Z6 ^, h <statement sequence3>;
" J: ~" y# g Y4 z* {# L end;
! t9 E' C0 q) ]如果分支比较多，用：) Q: w- l8 B4 n% E4 d
inspect <expression>
- I" j5 g: B4 I- G; R# o when <constant_list> then: S% V5 D4 Z1 w
<statement sequence1>;- _! k+ N6 F. n1 q8 A+ T M
when <constant_list> then, ^- z0 v6 a! [+ G2 a8 [; e! k4 Y
<statement sequence2>;% H6 N: ?( a5 b/ w
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else# I- b+ j+ a3 H0 I* R. e
<statement sequence3>;% ~: y4 _7 Z& @" z b
end;
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( e! \7 }1 B# D6 V9 S2循环语句/ Y- G! ]8 ~# z9 D: e
(1) from <statement sequence1>, `/ L, P& F8 |: O
until <condition> loop
* S' Y% M' X N <statement sequence2>;
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(2) while <condition> loop
- N9 L/ z/ {/ S' [- C% c <statement sequence1>;
/ }( b7 ~1 B# C1 ? m$ U0 m. D; ~; w end;
- i! D- o/ X4 x" k4 h (3) repeat . {/ q2 J5 ]2 w' c( L
<statement sequence1>;. C; U7 |" y! s! Z" \6 r
until <condition>;+ {$ p: @8 ]5 q8 A
(4) for <condition> to <condition> loop3 o: `2 X( v) [+ K& y o& h8 f
<statement sequence1>;
! R$ _) x, r" m8 |& { next;* }5 o8 V6 ~( \, c5 f7 c( q2 ~
3中断语句5 A: i1 Z) v E6 r3 G6 X# T( X+ t# }
waituntil <condition> prio <integer expression>;
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以上为常用的函数！
x. ~$ S/ A6 a还有很多，如有需要我把资料发到你邮箱里 ! t% M% @! Q5 f- O5 g- B+ g
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