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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" h; d& b$ w1 W# R3 P$ y7 u, t
if <condition> then
+ l# o* a% f( S2 G <statement sequence1>;6 ~/ g% a2 \ U9 D+ d' H9 c8 n: G
elseif <condition> then9 Q( W0 D' b, K
<statement sequence2>;3 v: |3 }( x. Q+ ^" s, n; d) S
else & t- H: Q; _3 ~* z/ q# P3 n
<statement sequence3>;9 @7 O6 G7 r. X9 w7 }+ e. P6 y% g
end;+ c; K; c+ S+ `& p( u
如果分支比较多,用:
0 M9 E1 z! z! ^) f8 [ inspect <expression>! Y3 e% h4 [& f& v% n. W( g# ?
when <constant_list> then) ?& z" J! H: a% P
<statement sequence1>;
+ M- m. z& j$ _/ Z) P: I when <constant_list> then8 p& K& s; W# ]
<statement sequence2>;4 ^ W8 O; W9 X$ L: d& {
..., H5 f: B! S) H& ^3 D7 E
else
. U+ M4 m7 p `% }0 |8 H( e7 D* ] <statement sequence3>;
/ z6 t) A1 T* P5 X6 r; e8 I1 Z; Z" \end;7 k, n* f+ ^$ B/ g+ b! b
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2循环语句
( x) W/ v. n7 C, V (1) from <statement sequence1>0 |8 X* J: e2 g4 K4 l( i$ ?( Y
until <condition> loop& Y, L$ v. u3 p
<statement sequence2>;
# ^& v' Y+ n; @ K end;- d l3 N! k' s5 a
(2) while <condition> loop
; x6 Z0 ]9 M% ^ <statement sequence1>;
- |$ R& n% t2 Q# M6 I; q5 @ end;
5 o3 `$ U4 V( m% p4 b/ E; l (3) repeat . M7 K, F: |: r9 ]6 _7 r& R x
<statement sequence1>;
6 Y; C+ q& \3 y0 `3 p; H, t until <condition>;& i. F# i3 E. F, ~( i# ]" m, [
(4) for <condition> to <condition> loop
1 f! A- G1 S& ]# |3 Z s <statement sequence1>;4 S% m4 Y) a. B$ O* c4 a9 U3 n# V5 m* T
next;( I( l3 m+ N$ k0 A( u
3中断语句
8 s N2 P( G; Y$ | L waituntil <condition> prio <integer expression>;3 l5 j! ^ W- \' Q% D$ p
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以上为常用的函数!4 }* j! E) i6 u D6 u$ V, {
还有很多,如有需要我把资料发到你邮箱里
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