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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
$ U# Y, m% S5 P, H0 { if <condition> then3 L7 q6 p! R3 E* t0 E. w
<statement sequence1>;
9 p, a& ~1 c" l( z, y elseif <condition> then3 H; e% J5 q) Q8 M6 J5 ]) z
<statement sequence2>;
4 ?) E' f& F$ B8 B& ^ else . N" ^* A$ {; _4 [. m, q4 F+ k
<statement sequence3>;7 B0 \" Z# d5 \" J1 V, m$ I( Y9 B
end;7 m# O+ K, ]" v8 m5 c' z1 |7 r
如果分支比较多,用:* w) h! L' N8 P( @" i M, {3 }
inspect <expression> n: [; V( @- D% T, {! c5 ~
when <constant_list> then( g3 W; S; k0 d7 J/ y; @
<statement sequence1>;
) j8 a! ]4 L; ~$ w7 Q; S; y when <constant_list> then
! \8 G: x4 L: n <statement sequence2>;" N. S, W o# k9 K5 G: g
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else8 W# _( r% D4 w' o
<statement sequence3>;
$ |8 D; }# L5 L% E. N+ I3 Bend;
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8 t- V/ ~/ ^; |2循环语句) N2 j% ^: z8 C- n3 g5 W; R
(1) from <statement sequence1>2 N# D9 \: f; w8 S) w" S5 p
until <condition> loop' q6 [) R/ \7 x# p
<statement sequence2>;
; ?6 o- a# z, K$ } end;
* G- [. B# o1 h% k+ h8 Y- C( {1 ] (2) while <condition> loop" Q. ]( R5 `- H2 x
<statement sequence1>;6 y! _$ n& f$ ~: Z/ r
end;
; a# C& B7 q7 W: m# i3 ? (3) repeat
) Y4 [- {' v7 N/ Q. B7 ]: S: b* E <statement sequence1>;
3 [3 V% o6 Y8 O until <condition>;$ k% |5 i: W( R4 L# H Q1 z) ]
(4) for <condition> to <condition> loop
e$ }/ q, i& w8 E G# R <statement sequence1>;7 u2 B1 e4 M& x, T+ g
next;
. f j7 T+ ]0 T- W, V3中断语句
n" u! \ @6 ~2 {4 o- c8 L* i0 C' `! k waituntil <condition> prio <integer expression>;* `8 i+ w) ?8 x& B/ O# K
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; C: Q k$ v! J& R7 P8 ^以上为常用的函数!+ ?% B0 z" x& ]0 [9 l( V Z. U6 z8 X- j
还有很多,如有需要我把资料发到你邮箱里 2 Q& @! `% L" K _+ O! M1 G j, F
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