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发表于 2012-11-13 08:48:12
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1判断语句# }, U- _6 r R4 i% v& |7 Q% E: i
if <condition> then
% r( k+ m( @2 }$ |$ @ <statement sequence1>;
- X! Y, e& w$ A" `. T elseif <condition> then* A- C! |; O# V' h9 G
<statement sequence2>;# O. `& V# a, i; e( s
else
6 q; D% U' ]: c0 u* p$ G! r" L <statement sequence3>;2 y1 X! R! h b# g" ]$ u% b- P
end;
# I# n3 k2 c( M7 C4 C如果分支比较多,用:
4 x0 P8 z9 P7 r inspect <expression>/ ]/ b( f" I X9 k0 _5 m
when <constant_list> then4 p( q9 _& ?5 D* X7 Z
<statement sequence1>;' r: a4 V3 h) L
when <constant_list> then
4 R: a; z: P% p4 q% v" X <statement sequence2>;
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else5 Q5 B! Q9 q1 y/ E
<statement sequence3>;
% l1 y$ e+ [; t. nend;
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) T+ o! ?1 [7 O2 M2循环语句! I- N" D0 Q& V; ^0 c6 {* _4 S
(1) from <statement sequence1>6 H8 b8 f' w U, [ n
until <condition> loop$ t4 ]1 _0 c1 a" Y( w# L
<statement sequence2>;7 o D& \6 L* t; w' ?! o; O9 h( }
end;
( g7 T. v7 P( o& L& G1 s (2) while <condition> loop
# g+ G* N6 V u }+ E0 m- C <statement sequence1>;
% ?% L+ ^0 l8 M! w$ K end;5 K9 _7 k; y9 K8 F/ ?
(3) repeat
/ y! J8 n4 q R. |2 V' T, v <statement sequence1>;0 w& d- j! b ~5 R$ Z
until <condition>;
$ a/ p8 N6 d/ u' ~4 H0 p (4) for <condition> to <condition> loop
8 ~+ f5 F7 P+ W) T8 R <statement sequence1>;
5 d( V+ u% v, P: [ next;
: J4 @, u5 v/ G% W3中断语句
0 e2 K2 O" S2 g+ u, f waituntil <condition> prio <integer expression>;
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以上为常用的函数!* U' t+ j- d7 M1 F9 y
还有很多,如有需要我把资料发到你邮箱里 , z* i1 L7 g5 @/ b
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