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发表于 2012-11-13 08:48:12
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1判断语句
2 @$ W8 w4 \- Z: G ~; h6 v( U if <condition> then+ h% J( _! I3 V; a
<statement sequence1>;
& B0 }$ h( u* c6 G% W& k6 E; m+ n ^ elseif <condition> then
S- W+ _4 b I0 U <statement sequence2>;
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<statement sequence3>;$ ~" b2 T( g- t# \8 S/ [; }
end;' P4 W0 l0 E' H/ z x( C* t
如果分支比较多，用：
2 }- w; Y' X" j7 j5 [* U inspect <expression>, {* D# A4 }% {% ~
when <constant_list> then
6 k. E0 O" U4 ~ <statement sequence1>;
! c$ m. s; {9 d3 S/ T when <constant_list> then
' q0 }/ C8 u7 s <statement sequence2>;
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else
1 I5 K7 Q9 \: y! K8 W <statement sequence3>;
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8 L1 P$ S1 g" ^9 q2循环语句# U) w! f1 V( {( `4 i: H) ]
(1) from <statement sequence1>2 t) Z) u- N6 H. q8 K% P/ T
until <condition> loop# ?) Z$ r1 Z4 Q: z0 Q
<statement sequence2>;/ Y1 z5 y+ N m; X
end;/ s4 j A. `( e w$ X# N( i
(2) while <condition> loop$ f$ g$ [/ i4 s3 q! h$ ]
<statement sequence1>;4 z: O2 P5 ^, S% [. h# b
end;
) z, K: ` |5 w# B7 K2 I' a (3) repeat - V4 x- v! g2 e) u- s/ }
<statement sequence1>;1 t/ @5 K) M% g5 S
until <condition>;3 x( w. g3 A! h/ H6 ?
(4) for <condition> to <condition> loop
( Y9 k' c! q% E <statement sequence1>;4 o: {: [- n6 P6 ~8 g
next;
* H+ J1 d* S1 Y! m3中断语句
7 K6 B9 g& u7 z" Q8 K waituntil <condition> prio <integer expression>;
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以上为常用的函数！6 {3 `. I1 A4 d
还有很多，如有需要我把资料发到你邮箱里 6 L9 C) @. s& K
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