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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
) G, _! v4 f+ m, _' {: T if <condition> then: X/ _- r0 G0 b" {- e" p3 m
<statement sequence1>;2 U9 g! c& D9 B) P1 ?
elseif <condition> then
0 j1 y6 a2 a. g0 E1 F <statement sequence2>;; L* B4 A& t4 @; Q" T' U4 `! u2 b. x
else
% a! m' K g% C' ]" S+ ^ <statement sequence3>;
7 R S: j6 ~" L& U end;
8 M: V) b2 C9 P6 w" u; J如果分支比较多,用:( _: _! U, P% d0 r9 O( i
inspect <expression>
) e1 T/ \2 M3 [) q# f when <constant_list> then/ J$ c+ o- j( g- E8 |. x
<statement sequence1>;3 {% @$ w' h$ H- p+ i
when <constant_list> then+ K3 t7 S; {6 v" k
<statement sequence2>;
+ ?" X8 r& Z" U6 P ...
8 u) R' J' t2 j! z1 P! j( v else. h4 y# |# q' a8 q
<statement sequence3>;
9 p* j6 Z8 N: @' f) R7 O4 jend;. ?, f/ M* A5 X6 l
% g3 z4 a$ m& ? J7 T+ S6 A+ _, _- P* @2循环语句* X4 k( T- t, s1 P% H0 w
(1) from <statement sequence1>
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<statement sequence2>;
i0 y" c) E* P, ^ end;0 w; x+ U, c# P
(2) while <condition> loop
- U9 Z0 H7 _( g2 i/ x <statement sequence1>;
]- x( K5 L2 o4 M2 v- t end;4 u0 ^( m& f, W+ r
(3) repeat 6 e6 q& K& |3 V
<statement sequence1>;
) a4 [; Q5 C* C& W; o" _5 t9 f, h until <condition>;
5 w/ }0 C2 v8 F1 U (4) for <condition> to <condition> loop
+ W% }' H) M) W$ Z <statement sequence1>;
$ u7 ^( C) b% i$ l next;
, g; H1 D( v# |, N3中断语句
2 i& c# a$ `$ H waituntil <condition> prio <integer expression>;
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' C3 M8 g- F! O- k以上为常用的函数!! Y' U5 h/ c3 O2 Z0 l
还有很多,如有需要我把资料发到你邮箱里 / ?: c0 C' W# j
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