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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" z. S! B) b8 H! ?/ A6 y S
if <condition> then5 V5 |5 U: [) ?$ d
<statement sequence1>;
$ P7 f8 S4 u9 f% R! t) ?& } elseif <condition> then2 x& p, u6 z K U O9 i, g R
<statement sequence2>;7 K4 @7 z6 i! m' o) A
else # `( c. G* E/ `8 B$ _8 t- `; Z
<statement sequence3>;( L# B- Y0 h: }* |! Q- m
end;
/ e4 }9 K/ ]+ D' N0 p6 ^, a) H如果分支比较多,用:
, N1 Z6 @9 B! | inspect <expression>
& w8 B% D2 e0 e" d7 h b: \ when <constant_list> then7 n9 r6 `( P. O& G4 W8 w: N
<statement sequence1>;% s$ _8 `/ I- N+ }1 A' v; |# Y b- e
when <constant_list> then- j2 m, u! {& k. D% l
<statement sequence2>;
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else
|$ d- f0 a% s8 _5 C4 S* { }7 z* p <statement sequence3>;% t: B, J! k: p0 D( K9 f
end;7 [2 b1 p. b8 V+ ?8 e
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2循环语句
3 p9 Z+ \) g* d/ W9 T7 R3 x (1) from <statement sequence1>4 F# Y& P" u( l6 E
until <condition> loop/ n# `3 B% f$ W8 U" M7 P: t/ V6 C
<statement sequence2>;
# M& |4 r$ t, E- ?, w1 |/ k end;: \5 X( {+ P/ u% |3 D3 \6 e5 X9 A
(2) while <condition> loop" M% c2 o6 Q0 V+ g
<statement sequence1>;; [- X0 E( ~2 K1 u' m8 J! Z4 u
end;
2 p2 G# u9 ^5 o) e. N4 a (3) repeat
+ j+ ^& Z) n: x$ b7 N9 e' h" D <statement sequence1>;
O, C, T, v0 D9 T, F: P$ [ until <condition>;0 Z1 k& ~' g3 \, Y* }& U
(4) for <condition> to <condition> loop; m2 s4 t; P+ E# i( @
<statement sequence1>;' \1 v) A5 l# r; {' x
next;
4 X2 h+ H7 a, f3 ] r3中断语句
: U, Z( B1 X* B4 F1 i% z- C waituntil <condition> prio <integer expression>;0 J# g W5 d+ m4 A6 u& A' n; s7 R
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7 V" U& o9 a0 P9 G以上为常用的函数!
7 @' i( ` {5 a$ A+ x) T; u: I还有很多,如有需要我把资料发到你邮箱里 Q2 R+ \0 [ i8 b/ Q0 g3 @
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