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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' @/ i- d- q/ c+ Z* G1 S+ n
if <condition> then7 a; h6 w7 \3 L: e
<statement sequence1>;# R5 p ^) _& D2 k, m7 J
elseif <condition> then% z6 l6 Z- I2 J" x- O* w
<statement sequence2>;5 G& S( {6 e( A+ Y! A3 Q- x
else
! S3 m9 V4 y0 @% ]- e# E! s <statement sequence3>;
; H! a* d) w5 t. M) h5 K end;0 `% \7 w- t0 M# o+ x, K/ C# S+ _
如果分支比较多,用:& Q9 |! v' N+ H) y
inspect <expression>3 s& s5 j. q; c7 x. }2 j2 c4 F
when <constant_list> then9 u4 O. S% G8 y! Q V- g
<statement sequence1>;; Q' j. b" \# f/ v* |" P$ i
when <constant_list> then
: C; }# H* r5 B& X7 i& [! a <statement sequence2>;
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else
( T+ f @2 E2 ] <statement sequence3>; K! F2 {: {$ r, _3 c$ j" _3 l
end;: |: f+ W- Y/ ~1 h# H# q7 e" D
I0 t, L. Z$ h: d/ M# D- _' Y2 T2循环语句
. s" W+ Q- b3 ]8 }" i8 X; C" ~ (1) from <statement sequence1>5 c$ T8 Z9 t7 U
until <condition> loop* C, Y5 _! m7 W# r3 ?
<statement sequence2>;" J% w3 g3 K! o
end;* A" O' H4 Z% Z
(2) while <condition> loop
6 F/ }/ ~. H6 N+ H* m8 P& @4 T <statement sequence1>;
) a& D, `$ i `9 O" j end;! I% q; X5 q9 q& N# P# z
(3) repeat
. _6 ]! w1 p$ Q2 ?& z <statement sequence1>;
4 I' X) m& g2 x3 o7 z until <condition>;
% {; x6 n; a$ b9 p/ h4 H (4) for <condition> to <condition> loop
/ R( V, l! ^0 w$ K8 ^% |! j <statement sequence1>;
7 b# e0 O5 s6 D- P7 ^ next;! \8 @+ l6 ~/ p; z. s
3中断语句
8 A7 v9 J E* \2 J) i3 u" c1 d waituntil <condition> prio <integer expression>;
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以上为常用的函数!
" d0 c G& L( D& |) D% t4 Y1 i还有很多,如有需要我把资料发到你邮箱里 ; o! W9 [' Q6 y9 e g3 f$ o
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