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发表于 2012-11-13 08:48:12
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1判断语句- q% U7 N, `7 g
if <condition> then0 H) r( B9 y3 l7 u: u4 `
<statement sequence1>;
7 x" @/ w \% E elseif <condition> then l" x" B/ S. Z+ ^! B9 Q
<statement sequence2>;5 |. T1 b6 y/ x" N ]
else - _0 D3 A7 D$ ?7 L( ]( b9 i
<statement sequence3>;
! ]/ _+ E) {7 C7 z end;
6 K0 f* u L1 w& M& g p如果分支比较多,用:
" Y. U' y% i4 b( u+ q; n. t inspect <expression>+ G+ v, X9 ~1 [3 S( R3 |
when <constant_list> then! U# ~$ L- K5 e" I! l3 D3 H. s
<statement sequence1>;3 K4 @- @7 s: o: ]) B' }# W
when <constant_list> then
! |( I- k3 b2 k" A1 t# B# l" i" k <statement sequence2>;; W/ g) N! {8 c& {
...! M2 I+ ~6 x% S" @/ v& W5 G
else
: ?& K2 `8 {0 p; G" V <statement sequence3>;- k: i0 b) z- Y/ {* l8 `
end;! N7 `$ X7 v& T' K. f$ C
1 g5 t1 E$ v b4 t2循环语句& j6 J: j6 N3 d, |7 J# B- J
(1) from <statement sequence1>
) q7 c9 { X. c+ G7 ? until <condition> loop
. G* R- I8 p4 N, T e <statement sequence2>;/ X! q8 }# n* y2 W! X1 _
end;2 \, I1 t1 a+ h" S- c0 Y
(2) while <condition> loop
- b( a" }% k. \ <statement sequence1>;
, A/ i& a* K. D& `1 M end;' O v! n9 {6 \' Y- G. x, D! v" ?
(3) repeat
5 u2 `7 h) j y( {/ T+ f <statement sequence1>;6 }- _/ ~5 D7 _# @9 s
until <condition>;/ u- X. F- j/ d4 v& V& N
(4) for <condition> to <condition> loop2 G% |5 z# d- Q5 `
<statement sequence1>;
' q% [( ?1 n7 G4 H1 I next;. e6 p9 x% @. D
3中断语句
+ I# t% `2 q( n) [ waituntil <condition> prio <integer expression>;' P2 M( U; P% T1 W8 D
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以上为常用的函数!) N' w! o- Y! }2 l6 U9 Q
还有很多,如有需要我把资料发到你邮箱里 " ~, I. r5 u% R/ d ?3 B, [! P
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