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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句: q" M; H6 m i5 G4 k; c0 q" k# q
if <condition> then9 {3 Q+ d5 |( v6 J2 Z" u, O ]6 T
<statement sequence1>;& Q: d3 C0 e z: D+ Y0 ?7 P
elseif <condition> then
7 ?, }/ z+ ~) [0 k X$ n' y J <statement sequence2>;7 S o) j |" w3 ?- B# T
else . T! X: d- w: Z& k* c
<statement sequence3>;
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如果分支比较多,用:
" P" Y& Z& A: P2 n8 K7 d$ m) L inspect <expression>
$ v$ G1 s& n& N$ h when <constant_list> then
" R. F* x# q9 o0 }# J* ~& ^ <statement sequence1>;
& s7 b9 l6 j( l1 y& T+ T, F9 K when <constant_list> then: {) x9 ~ x& U+ Y! X U4 W
<statement sequence2>; H, w* y; z8 y- M$ y( ?/ N+ v
...
" ?9 b/ {1 m, B+ t else
2 z. R1 R/ S% h <statement sequence3>;* W5 b6 D2 P/ }. x8 F
end;8 P' p) {+ i$ N: C9 i" q+ Z6 L1 ^
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2循环语句
9 p! A, ?$ s) h+ X (1) from <statement sequence1>8 [* P& s- n: v( Z" [# N
until <condition> loop J1 a& [$ d4 L+ n8 o, k7 V
<statement sequence2>;, V/ P; k* @! k7 k( Y
end;
* y2 v+ I3 k3 t (2) while <condition> loop5 O' |2 ~6 C0 C6 k, X
<statement sequence1>;6 Z" @6 C! c4 Q! ~4 n
end;6 a/ ?0 }: G# S6 G9 p
(3) repeat * R: t% t# [& E; G, p
<statement sequence1>;; c, ~. Y9 z/ Y: @
until <condition>;
- m. f3 z7 H& L/ S8 n (4) for <condition> to <condition> loop( y, K4 A0 {: }# R9 d# W( Q
<statement sequence1>;
. K6 Q' L, I* E, P next;) e" k# n7 o) N/ }; d
3中断语句
; |& E( Z# J% H3 { A( V waituntil <condition> prio <integer expression>;7 L) W4 Y w' g7 s
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以上为常用的函数!
, |: R% _9 Q! O) F* B还有很多,如有需要我把资料发到你邮箱里
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