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发表于 2012-11-13 08:48:12
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1判断语句- F7 Z1 i8 w7 c+ `+ n# R
if <condition> then
+ e5 o" w% O) T <statement sequence1>;& P3 E$ X+ F! I9 \% ` ?
elseif <condition> then
6 N9 G5 Z) ]1 f, g <statement sequence2>;
2 O7 ?7 R2 f! D. Q else / I Y0 v# A4 t- J( G" n
<statement sequence3>;
! r6 y- U' }7 o6 b end;
1 P3 _2 \/ F, Q# c: @如果分支比较多,用:( H- t5 r9 U6 r+ ?5 ~4 S) t
inspect <expression>
0 K5 Y7 \/ s) n. D6 K' u3 E: O: \ when <constant_list> then
0 T) N* l4 c9 i <statement sequence1>;
% a0 g7 l* i- e2 ?; y' @ when <constant_list> then
) }2 F$ u8 [' G. P, z) f <statement sequence2>;
; k- H% h8 `7 ?5 c8 @' P ...
% n5 r$ p- H b! E+ D. H4 p0 F else
9 b; ?0 O- B: v <statement sequence3>;7 p9 N: T& j& P n( p% l
end;
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. U$ A- P- N$ E& N' `3 {7 ?7 u2循环语句" r2 L, c) q- A; u% i1 `
(1) from <statement sequence1>" I1 U( H: A5 l/ W
until <condition> loop
& o1 |* P& j% R) {( ?! @ <statement sequence2>;
" g, q# A$ C% N. A end;
! g/ C* j8 ]% o( E# q (2) while <condition> loop0 a- P2 o, c) y, g! T2 q2 _) H
<statement sequence1>;
, f8 O/ T8 h+ `, H) Z2 k end;- Q; y1 S3 k. ]/ Q1 I
(3) repeat
+ \! \3 D" p" E <statement sequence1>;! e! p3 Y9 m. [+ @' g+ [
until <condition>;/ ^1 Y; ~. s6 O
(4) for <condition> to <condition> loop5 [1 |7 K+ E2 I" ?$ d. u' H
<statement sequence1>;
; ?; D5 T- N; _ next;
2 v7 V& A6 s& {& V# \3中断语句0 u- _- a1 g; y5 J3 s
waituntil <condition> prio <integer expression>;
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以上为常用的函数!
. g$ f1 O s4 B% b( H6 Q还有很多,如有需要我把资料发到你邮箱里 ' \ A C- T/ a- s q& Q- T
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