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发表于 2012-11-13 08:48:12
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1判断语句$ U7 r l- [6 ]" W! X. r
if <condition> then9 [- E9 @! }9 t O/ B
<statement sequence1>;; V/ W0 @- @0 E
elseif <condition> then R" A4 ]% a }, k) W- p+ l. p
<statement sequence2>;
9 k4 o! I) _8 p: U B8 [5 t else
4 B3 l, ~% y! o* `8 }5 A <statement sequence3>;; s6 E1 D/ |5 Y, X/ Y5 Q3 e
end;& }' w6 C( m, I/ @
如果分支比较多,用:
; l" k; f) F' [6 s0 u inspect <expression>
2 j/ F+ ~, o" b6 x8 n when <constant_list> then
. }/ ?0 Z8 m% ` <statement sequence1>;
8 U; S0 g5 U) i8 n when <constant_list> then
' Z8 A8 f O: T; z N' E4 h+ `$ @ <statement sequence2>;
7 y9 I: i; f: }' M: ]! K7 `! c9 M ...
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<statement sequence3>;& y2 Y: l$ E3 E& P! I' S
end;
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2循环语句5 s! Y( p& i' V# z/ R
(1) from <statement sequence1>$ ^' U: s. R* d- [
until <condition> loop
2 `+ K+ }( Y2 o2 I- k <statement sequence2>;% x4 w) q4 m0 N& Z
end;" e# s) s* X) \" p S
(2) while <condition> loop7 e2 V$ v- @/ `+ }
<statement sequence1>;
2 y, o( R& ]6 |% a3 {8 k! Z end;8 D: g% G$ m1 r5 [
(3) repeat
$ k4 k/ v- V9 L3 ~& X, }& U p2 K <statement sequence1>;
# O o, D! t2 x6 y until <condition>;
* g, U1 K% O1 N8 N (4) for <condition> to <condition> loop* p7 i% h) g, u0 U& p- @8 N. l# k
<statement sequence1>;8 K) |+ I) Z5 H( S( d
next;8 {5 Q( _+ b$ W6 c( g* @7 L8 A# { G
3中断语句
# F! v; e/ Q0 ]* [ waituntil <condition> prio <integer expression>;
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以上为常用的函数!
2 H, L+ N+ Q B. ^还有很多,如有需要我把资料发到你邮箱里 9 m1 H' Z3 D& K6 r
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