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发表于 2012-11-13 08:48:12
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1判断语句, W a( L6 h! p) S& q6 [
if <condition> then* M J& {2 u, n) a' |1 _
<statement sequence1>;
4 @/ n, C4 E9 s! k) V- o: I elseif <condition> then
$ U, _& |4 C. \5 z" w <statement sequence2>;7 Y4 C9 [0 b( B! @8 o
else 4 M' q4 p7 @+ R' t
<statement sequence3>;6 q& l& P7 O4 n o; V! M- r. D" {! a
end;
: }! ^& M! w, y9 h; O) C" R" a如果分支比较多,用:
% h2 P5 ]* ?* U6 {1 E inspect <expression>8 l% ?# z! b2 c- p( C% z
when <constant_list> then* x: B! P7 x$ K( `& I% n4 e
<statement sequence1>;8 l: v7 X! V2 y0 n% r# e4 N; H3 y
when <constant_list> then! Z/ z) g1 \" V7 r- [( j4 \
<statement sequence2>;7 W9 e% Z7 i2 _3 t8 }* S9 }' S
...
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<statement sequence3>;) V6 s3 }% K% r0 w$ F) D
end;
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) O6 t1 G, r7 L. C2循环语句5 ?4 Z% Z, s' T! b, u
(1) from <statement sequence1>2 i: u! ?" r4 e D3 g3 l7 f: D( ]
until <condition> loop
- y. T- F Z$ t <statement sequence2>;
. |( r4 L3 T! u4 b6 K end;
- [+ k8 a4 A! t% w& ^ N& j (2) while <condition> loop* V+ G R3 u* y
<statement sequence1>;
3 f1 e' s8 L6 H! Z( @" Y end;
3 c- l# i% d0 M; E5 t1 w (3) repeat
% }* d9 d2 S/ ~9 d% C' _% Y( ?7 ^8 x <statement sequence1>;( @% K- `* g3 `+ L; w
until <condition>;
! O9 R4 d/ Z% h( G" V; u; h: U) T- a (4) for <condition> to <condition> loop$ g5 T$ T( p, ?- B8 Y4 s
<statement sequence1>;, v. }( ~) p/ L: N) I
next;& c6 e$ X1 a" C4 B9 W; d, Z
3中断语句
. c4 ]8 h! }' j" R* G0 T. i waituntil <condition> prio <integer expression>;/ m6 e! F4 f8 X/ J" e( [6 ~/ {- O5 _
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以上为常用的函数!
1 ?2 Z: Q+ { n6 E/ ]; F/ i" O还有很多,如有需要我把资料发到你邮箱里 4 \- ~9 H V; Z6 B# P1 b
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