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发表于 2012-11-13 08:48:12
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1判断语句
1 l- s( w# i* T. @ if <condition> then
" _$ z. o4 g, f) j <statement sequence1>;8 U( r) t! \8 M5 {2 D
elseif <condition> then% H5 X0 X" {) z. G
<statement sequence2>;
3 S! W9 n: `; a else 5 d9 C2 C/ c0 R2 }2 M3 z' N* F6 _. ]
<statement sequence3>;9 P7 s- B5 u+ }$ i) ~: N
end;) u. o! a% L3 I1 z
如果分支比较多，用：
& h8 l1 q" S7 d2 P inspect <expression>( N# P# _) W$ g, M4 m
when <constant_list> then) t3 e r! p4 b1 C2 X w
<statement sequence1>;
* u- Y3 C4 g N( w: S7 g when <constant_list> then) j* I: ?5 f7 M! W! i4 J( A- t
<statement sequence2>;
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else
" b' S0 e* b# p9 G7 {5 f <statement sequence3>;
# R( ]( S! C$ l. ~4 v, Nend;. W/ C: ]' e% f+ |- R8 n
. f$ W% d8 n' H& Z R2 q2循环语句
9 a0 x% _* ^; g2 S/ | (1) from <statement sequence1>& @' _4 l# R" \0 y( i& ~! E8 z3 g
until <condition> loop: W$ @/ U$ l+ L1 A; u! J) B3 V
<statement sequence2>;5 ]' ~- ^. |- g
end;$ L1 w4 l6 S. w N% Z- B# Y
(2) while <condition> loop$ l, k, r# h# |: M0 P
<statement sequence1>;
& s& f }" `" f8 Y4 T" `. Z8 G end;# U: q* Q, r! j h2 ]
(3) repeat
& `8 h3 @5 f" h5 T5 t <statement sequence1>;$ Y) v2 t; y' X. G. Q+ H6 X1 @, y( i
until <condition>;
" G' e% C5 ]8 u (4) for <condition> to <condition> loop
7 S4 O7 A" G1 b# @# k <statement sequence1>;
. ~ D3 v! v2 X7 e- {" d4 D next;
3 _/ k( v; Q2 {% k5 @9 Z6 j3中断语句
& w F9 x# k I. g waituntil <condition> prio <integer expression>;
: ^! s. E; a. p ?+ @
8 m+ j( W5 O1 i9 y0 h
$ z. R! W. u9 ?% z7 m以上为常用的函数！
0 W. {- m. V/ @: F( z6 Q还有很多，如有需要我把资料发到你邮箱里 ; @& E) L. k R+ X# l2 v4 i
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