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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
) N. |2 p$ R7 `, R3 c, j: l if <condition> then1 i3 _3 B+ L J$ S4 E/ m$ h9 T
<statement sequence1>;) Z# s. }7 E# W( O2 j
elseif <condition> then% ?# s* x& v5 P) C) j
<statement sequence2>;
2 ~1 Q3 s: U. e% x else
( Q1 B! E' C! B' K8 a) P( z3 M <statement sequence3>;9 V' \! F6 U' _% O1 Q! Q
end;1 H4 v. q1 v0 J6 Y* _! e: r
如果分支比较多,用:
7 b' v: I2 t" c% G$ m inspect <expression>
9 _) F/ F; S, a* `& L when <constant_list> then6 M6 V" q7 u0 Y
<statement sequence1>;+ V5 t- B' Z8 q: |% t1 D: E
when <constant_list> then
% t' ?5 ]0 h, L3 _ <statement sequence2>;
- [9 }; \5 B' ]% p0 s ...
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<statement sequence3>;
9 n' I2 y" T. a1 |4 O' D9 A. Z2 {end;& A; g8 V. e0 U, }+ [
8 w6 c/ L8 r8 b" {
2循环语句7 w' o3 k b0 P6 h% [
(1) from <statement sequence1>/ f" N& N6 ~6 d1 f% X) J: ]9 ?% ]
until <condition> loop
4 y! `( v3 ?+ ?) q @% D <statement sequence2>;
* q, R+ ^* i6 ?2 w end;( t" c" R- d2 R. W( J( l
(2) while <condition> loop
& `! c3 {- T6 J4 l <statement sequence1>;% L! B% O/ D4 `( v5 m
end;
& ^8 r4 F/ N ^# {& T/ t4 X' U (3) repeat $ F8 ]1 C7 e+ v. W6 B$ L8 J
<statement sequence1>;
/ v. p# H3 @3 E* O until <condition>;1 e7 q; o( V( J5 L. r% w
(4) for <condition> to <condition> loop
! q+ l; Z- R. O; b& q' f <statement sequence1>;* h5 k/ `: A" @( e9 y
next;' H* \4 s* z3 C
3中断语句
{) M+ x8 @6 g [' V4 V' d: z waituntil <condition> prio <integer expression>;
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以上为常用的函数!
6 v$ w6 n5 F K; {6 c, U9 r还有很多,如有需要我把资料发到你邮箱里 : |2 S2 t: }( Z) h9 `8 U: Z
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