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发表于 2012-11-13 08:48:12
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1判断语句3 r) _: t& Z- _& \
if <condition> then
! d. r3 ]7 p" Z( n7 v5 J9 } <statement sequence1>;) g$ S9 }( d9 I x7 K' A
elseif <condition> then1 e# f q4 g1 ^
<statement sequence2>;
# J/ B* ^' v: w# ? E/ Q else
$ k* y. C' S( U0 {$ U5 p2 J8 o <statement sequence3>;
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如果分支比较多，用：
w" y$ {: P/ H4 C6 ^ inspect <expression>& ?7 F5 t6 @! z0 Z
when <constant_list> then
$ m) U B! \% r& ]' B S; e <statement sequence1>;
9 u$ Y- ^* E, c3 @4 `0 z& x when <constant_list> then
) {2 ?1 H8 y5 ^. { <statement sequence2>;" c2 A: c8 S2 \0 @' U6 D
...
8 n4 V Z$ _( P4 Z- @/ Y else
# `2 ~3 m G2 ]/ h' J <statement sequence3>;* ^& k" r0 L1 N1 a) ^
end; c) `+ y& B9 }! @
5 D1 s- A4 b4 M: d- e3 g2循环语句
: {1 E( U! w0 @( o (1) from <statement sequence1>
4 ] J& y" H% ?2 Q0 Y6 [8 A) o until <condition> loop
: U4 T* u- H% A8 J( b) X; D <statement sequence2>;
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(2) while <condition> loop) I- k7 b4 v& c4 v) D3 {0 f4 o
<statement sequence1>;
* U+ ]) B& w: z; T5 G9 ]6 A end; q, ]1 T- `# t* I7 @' b
(3) repeat - m& W( x6 v& g5 B6 w) I& n- H( x
<statement sequence1>;/ o& Z L8 B5 Z
until <condition>;
; P; q# p" E9 I! D7 r8 t: C! B (4) for <condition> to <condition> loop: I/ x; z1 D, B. U. ?3 F& R
<statement sequence1>;
" N7 I6 e% I2 h next;
. d& _: _6 P& i. E8 @) _' q9 _3中断语句
' ~$ x% P6 m' R8 p! W waituntil <condition> prio <integer expression>;
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以上为常用的函数！+ t8 |9 j3 o% ^1 m* d6 c! [# W- l
还有很多，如有需要我把资料发到你邮箱里 + O. S+ {5 k& n" w3 t6 b. I3 |
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