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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
6 Y2 l" l7 `" ^; e& Y6 D if <condition> then% X$ y. \ [+ T, L; H
<statement sequence1>;% J3 P2 ?. `) ^: e0 F7 q, U
elseif <condition> then% v) [9 y/ e: G, g. h
<statement sequence2>;* f5 Z0 G6 f7 z( Y* @, r
else 2 a, t6 M5 o9 q! B+ `) n o+ W" m. L
<statement sequence3>;. v c8 U( I' x/ T5 F3 w$ v- {
end;
# O. r+ C: A! w# G4 L& s如果分支比较多，用：& _, E4 A* @5 D& o3 Y7 _' n
inspect <expression>
: k1 Y4 Q6 e$ W: a when <constant_list> then% i H. U2 Q+ a2 @" s& Q
<statement sequence1>;
V4 D. P' F: c5 L when <constant_list> then" e5 b2 M+ }6 ]- f3 K+ f0 m
<statement sequence2>;
" I' _# d `: F* Q+ U, p7 y ...
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<statement sequence3>;' c* m# C# X9 S/ t
end;* G. K" a6 f/ T3 q; H1 s* _
: g) I9 I5 C$ {& M1 i2循环语句
4 v, U C) _4 V G, r* P (1) from <statement sequence1>' N( U' u8 x3 D% z9 Z* Q7 b8 n
until <condition> loop
( x) c. j2 B% _- ^$ i3 f <statement sequence2>;
: l5 u7 F+ X1 D/ C$ U L end;
# r5 K; p! v/ t* L6 ~. C; ^ (2) while <condition> loop, l' J! C5 H$ [! l! b$ v0 i- U
<statement sequence1>;
, C5 E$ q# ~% d* Z9 i5 T2 T) m end;% B/ L0 U6 ~& h$ p
(3) repeat
& V" M+ w; {, l2 Q8 P <statement sequence1>;4 S9 T$ s3 @9 `4 J' q
until <condition>;
) T1 l( r% x: h- `, M# X (4) for <condition> to <condition> loop
+ G$ a3 v' Q6 @ <statement sequence1>;) b/ f$ X: i1 I
next;
2 G! @1 t6 u6 i8 j! E& z2 b3中断语句
6 G2 i' G$ U" y+ l9 u9 c: h6 U waituntil <condition> prio <integer expression>;+ ]. `5 ?5 ^6 k h" Y- f" c
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0 W4 }4 Y- l2 q. x, ]以上为常用的函数！5 L( H: `) d) c* w5 [ ^5 F# i# N
还有很多，如有需要我把资料发到你邮箱里 7 \4 V/ ], x( @5 y5 R
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