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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7 w6 y. M2 }( ]$ ~" ?- `. M- N
if <condition> then- J* W# O* w( j
<statement sequence1>;
- M- \; S0 ]7 b, i, r3 K elseif <condition> then
! N0 |* M* ]! h+ l0 i <statement sequence2>;
# x- w& k- o" ?0 h1 d else
: |0 Q# P) Q+ W7 G; l9 F& l% A <statement sequence3>;
. ?' X x$ I9 P0 P; d/ w! U end;
+ D& z. z E4 R- l& r* F- k如果分支比较多,用:; _( n9 f8 B, C- W' N& u
inspect <expression>( \8 y! O5 x- W; P [# w4 J/ Q
when <constant_list> then0 @4 l$ w9 F& f+ I2 G k. _
<statement sequence1>;
0 \4 M6 N& f* P5 \+ w; e$ v when <constant_list> then
! c6 `! ?- u8 ?- ^! |, y s <statement sequence2>;
; c4 P- l0 e+ n9 ~& Q) {8 i ...
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<statement sequence3>;
' F8 H$ I- k! y! cend;4 O7 f3 ?/ V2 \1 K$ S
) G# ^, f: j4 a2 t3 g2 u2循环语句
1 [& T, m8 N: e; J+ D$ z" h (1) from <statement sequence1>8 X- r+ Z, R2 o
until <condition> loop* x: E, |& c0 z* H6 \) e
<statement sequence2>;9 R+ K5 P" R+ W+ n
end;( d5 u7 j3 ^2 L/ c; g# ]
(2) while <condition> loop
4 J+ L3 d4 ?2 ?$ E5 L <statement sequence1>;; B8 p. v' a; ?0 \" I
end;
4 y2 u1 {4 D# m% z0 |& W6 Y (3) repeat . O- O/ g& X$ j( ^' X, U
<statement sequence1>;
. x/ f& q3 j* r% Q! [% Z3 _ until <condition>;
8 _1 f2 I5 v" @7 o (4) for <condition> to <condition> loop, w5 B+ M; T7 R$ ^$ f6 K
<statement sequence1>;) I! H9 X; n9 S. G9 u( G/ k
next;: Y( g4 y; Z$ K7 q4 S4 Z! A
3中断语句; s. v" a A* Y5 q* `+ |! z; z
waituntil <condition> prio <integer expression>;6 U4 `+ y6 r& g+ b
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6 E4 }- A( t, D; m5 i以上为常用的函数!7 i$ z& d. Q) c4 p- N- X
还有很多,如有需要我把资料发到你邮箱里 ; d0 h* g6 z; f
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