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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
% v7 ?6 K. J& o if <condition> then
) ]" U+ Z2 J4 b( J2 ] <statement sequence1>;
3 d0 ^& ]4 r- o+ _7 f elseif <condition> then
& z9 H( ~! E0 g/ y$ C <statement sequence2>;" {- `) V" O8 ?( N6 R" W9 P
else ; D5 u* J' ~: N8 A6 O/ K" }4 w8 T
<statement sequence3>;
$ L( M- U$ D. Y* h4 \ end;5 [9 n" q7 H$ K/ G) g2 O
如果分支比较多,用:
7 N3 y- L2 t6 U& } inspect <expression>
2 R; y- `/ p7 y7 v, o! S when <constant_list> then' d3 Y: g" u" ], R( j7 u! A
<statement sequence1>;$ O6 ^+ B4 C1 V) P6 g1 ~
when <constant_list> then$ a- M- I* p: `: O2 Z6 ~/ C# u
<statement sequence2>;
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else3 l* t+ ?- i |$ _+ c
<statement sequence3>;
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2循环语句& J' J i h4 _) ?
(1) from <statement sequence1>. Q6 A& n( y! [0 m- Q/ Q
until <condition> loop
* K% j3 O) \4 g* J% ] <statement sequence2>;* k" q$ s! P! R7 L+ I' I$ P
end;% s* i6 j+ |5 }) \1 w, f+ x% V5 b
(2) while <condition> loop5 g6 L K4 I/ ^) t
<statement sequence1>;2 q5 J- V7 w, U& @
end;
' d) s; u2 `: X, e) P- j! Q (3) repeat
# G5 W6 o& W: O2 X. [% y8 E- N: m <statement sequence1>;; @1 N. b2 H! O+ ~0 Y9 ^% h
until <condition>;
+ r, o: ^! G' Y; T3 V6 C (4) for <condition> to <condition> loop
/ D! M9 I" `, r4 S. W/ H5 l <statement sequence1>;3 O2 W4 V0 e- D0 q9 i% K
next;' N f! n% j$ S# E7 ~9 r/ @5 a
3中断语句5 ?$ _9 V& I6 N
waituntil <condition> prio <integer expression>;+ a+ r" C& V) b- }/ I
* C$ V$ P! j# f( ~
0 g6 d. ]6 K3 z1 C, p H以上为常用的函数!* U; w' I0 ?+ x7 c
还有很多,如有需要我把资料发到你邮箱里 ! @! K- j, u7 [, \0 D3 {
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