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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
% X8 k3 l3 S5 }" D% g/ B o- b5 o8 c if <condition> then' {+ i1 u( _* `0 \: d( {% ]; b7 O
<statement sequence1>;/ P' p) Y) s: U3 @$ U. G1 O
elseif <condition> then0 \! u( l# p& t1 E2 o* @
<statement sequence2>;8 _* w9 h! [0 H( |: b% ?# O
else ; z" z. i/ b# h& C$ b, n
<statement sequence3>;; B- G% ^& y3 T# w# d
end;
0 e0 q2 {) D1 d+ i. Z, w2 v6 J7 O. r如果分支比较多，用：% _3 q! J! G0 f6 d; b
inspect <expression>
# V Z- y& [1 \6 l( p2 Q O when <constant_list> then, _- e0 {1 L+ H/ F4 J, W
<statement sequence1>;3 n) ?) H8 W# x8 Y/ k* ?6 `! M
when <constant_list> then
1 Q* {8 P& o: K1 F$ Y <statement sequence2>;; q ~+ U' g! m) b4 u# T
..., m" L0 E- S+ b* f
else
- m6 ~" ~. d8 ^% I( e <statement sequence3>;
$ Z3 W0 X( d9 o4 V( F& I- n+ Z* }) qend;7 ~2 f6 d$ p4 O2 U; H" P
& Q' z6 O+ Q i; e$ `2循环语句. b- a- D: l1 ~# Z: G
(1) from <statement sequence1> D" ^: k$ o3 C3 V# A/ O0 ]
until <condition> loop
7 M# j0 Y& \. h2 M; I* \) i; c <statement sequence2>;: I6 A1 Z; {1 d
end;3 s7 ~9 H7 P2 C
(2) while <condition> loop
0 _: c! M% \. Y3 W0 V <statement sequence1>;' h3 Y8 I1 H6 O: l! U5 L& D4 U
end;
: F- z$ z+ h* Q' T. H2 p (3) repeat
: w: R* G: Z1 X4 t <statement sequence1>;
) g1 B2 R5 M# T7 u! | until <condition>;
, R: o# n7 |& ~( U) { (4) for <condition> to <condition> loop
( z$ N& K% _! `/ t <statement sequence1>;+ M" E6 n+ u3 U+ Y4 r
next;4 K- \# L1 ]) X9 z! I6 F6 o0 e( `" s
3中断语句
. P. i* I3 b4 A* V1 F# {3 F waituntil <condition> prio <integer expression>;( O: o$ h9 [" r* w: S
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! V; M5 q6 d$ }! x) c以上为常用的函数！4 c0 o- Y) n& p4 Y! l
还有很多，如有需要我把资料发到你邮箱里 ' J, S! b3 X. d0 h* e# Y) X% ]1 |
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