|
|
发表于 2012-11-13 08:48:12
|
显示全部楼层
1判断语句
! H5 q! V7 c3 e* Q if <condition> then0 {8 i: c, t: @) G) ]+ S
<statement sequence1>;
0 Y8 V5 l+ s" z, { elseif <condition> then( r, @9 r. M1 }& m, L4 C- @
<statement sequence2>;2 B4 w" g- E( B
else & o3 f$ e: g6 {# P& H* E6 b( B
<statement sequence3>;* w$ ]7 w0 ~" y9 v
end;
$ l' ~' R/ v8 B( C9 d如果分支比较多,用:/ f `+ \$ r$ A9 ^8 C
inspect <expression>
8 K& [. ^5 L2 F' S: j/ _ when <constant_list> then
1 m0 j0 R0 b2 q5 E( z <statement sequence1>;/ o; O6 g6 r% w1 R8 \! I$ y
when <constant_list> then# O& ?' f- r# d
<statement sequence2>;
, n i1 I5 t8 ^' E+ k- ?+ t ...1 C; @: G+ s& S
else4 D' B- B3 q* H0 t. B* y
<statement sequence3>;
& S3 } O4 W' ?; s( L% a6 w# F+ Mend;
2 T- H5 K- F t7 h
- K, n) Z& d& F8 A, @% A2循环语句
& C: P! E9 m- D8 W' ~ (1) from <statement sequence1>& G7 u6 h% f* h7 y. D N( t
until <condition> loop
: c! \0 W/ ^; u' P- b' A1 s" P <statement sequence2>;
0 K* j( V" ?# D- g end;- | h/ B( W2 |$ a
(2) while <condition> loop
) \/ e7 G! w2 x; ] <statement sequence1>;) K6 t5 O9 {% I# n. E1 v
end;7 _ O$ m! e& |
(3) repeat
7 g8 W! w# O5 M; ] <statement sequence1>;
. k5 \1 l9 B/ `2 @% K9 e until <condition>;: [& g& q8 _8 p% }$ z% Y+ I& V2 o
(4) for <condition> to <condition> loop7 v7 i6 y k* N1 J) R( q0 [' C
<statement sequence1>;: A, c# p% v( \! ? V
next;! ^ `* z. z0 O S$ x0 M5 T
3中断语句8 X; D# I/ V! G
waituntil <condition> prio <integer expression>;) |3 l" p- l1 I; ?7 k; R
Y! S: H- e+ z) r3 S8 r
; Y' z4 G( h9 b5 i7 r以上为常用的函数!
1 R' c+ J# X, h还有很多,如有需要我把资料发到你邮箱里 . \3 I' i$ A/ A2 ]
1 L4 L# N. T# Q0 f9 \% h
* r0 Y- I: {1 l" I7 `8 a( ~
- {: r. S; K* N9 O
" ]8 A: z% r1 D, }/ j
8 M t& @: E" r7 ?. ?9 i! x3 J. \0 M! _# j! X Y' p# [: g
3 T0 f. e+ \( z# M! W; z; x
0 r W# r2 [: P% j. V M8 p; ^& p+ @
1 l6 t. _: g& S* V( _+ p, F
3 X5 k" [* f1 g7 h N- h |
|