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发表于 2012-11-13 08:48:12
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1判断语句
1 `4 i1 O4 d* R# O, d* Y& h if <condition> then
! W: L G) O- L$ D" q& {9 {3 s <statement sequence1>;
" m. q; ~7 L/ r b5 m; u7 Y elseif <condition> then$ R7 T d6 n4 H' w: w; _
<statement sequence2>;! X( H4 i" |, ]& u) a% e
else 1 A2 S8 U& _5 ?" X5 o
<statement sequence3>;
: u" N" {: R. N end;
; v7 M% m& y- x如果分支比较多,用:
% J% x* l& m$ n, _0 Z inspect <expression>* ?% e6 d4 a3 F# |
when <constant_list> then' F% l* N( P; @- G% Q0 K/ \
<statement sequence1>;
+ d$ R, C1 m- v1 q& ^ Y; y, ?& c when <constant_list> then/ v+ c. e# d; N7 Z" v7 `% e n
<statement sequence2>;3 |0 e& h; {; ^: h
.../ G6 i' g! B3 {/ D( m+ M
else4 c5 B; _+ {! M! W, p d p
<statement sequence3>;, U* o* g- j* e- ^( W
end;# {; O1 Z% {2 _* g; |! J; j1 C
/ r* R8 V8 P" s" w$ k- K' f4 |2循环语句: S) d6 K* t3 O; D* T0 A; b
(1) from <statement sequence1>/ L8 A5 M6 Y6 ]: R
until <condition> loop1 z+ `! c5 N6 A7 s! U* m: c( \; f0 l
<statement sequence2>;* C' l( D. M. P5 P! z) G' @$ s. o
end;; R" B: \+ @; x) W6 a; O
(2) while <condition> loop
# k- s/ e9 W0 O3 y) ~7 l1 n5 _ <statement sequence1>;
, Q' P. c5 u8 S, L end;
% w& f, Y4 V. ^. R# Y' U (3) repeat 5 p: }: D0 |( Z
<statement sequence1>;' V* g, ^ r, `% u8 z5 e
until <condition>;) w2 }% r6 o" R
(4) for <condition> to <condition> loop }) l; l$ j& ^( z* L
<statement sequence1>;2 Z0 H$ M* ]1 B6 u2 z, ~, {
next;
0 L Z p0 B$ M, A" s% j( C. w+ X3中断语句
( y% {9 c2 c! Q+ y2 F5 s3 Z1 i waituntil <condition> prio <integer expression>;% d5 e# D9 i( ]& ~# B
. j* B1 G ]& e1 e
; e) w* V* i1 n
以上为常用的函数!$ {! C9 C, |3 T6 Y: A. H: C
还有很多,如有需要我把资料发到你邮箱里 3 `/ u& ]* s1 v" P! w- L {! W/ E i, e
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