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发表于 2012-11-13 08:48:12
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1判断语句/ t5 d2 c4 R' Q4 M/ u Y) o4 y
if <condition> then \. T( t9 j& u
<statement sequence1>;
! A; c% o- q9 J- ~8 s# e7 N elseif <condition> then* x; S8 J0 J8 }) U( `3 r2 _9 O, O
<statement sequence2>;3 e6 Q h2 x- \1 B
else % d1 A6 o8 D9 {4 J6 d6 L) B" D3 N1 P
<statement sequence3>;
/ u0 y2 t/ v x; e* U end;
" @) S( T. S) I- c \# s5 N5 w如果分支比较多，用：0 D& }- |% F t/ H$ e1 U7 k0 v0 d
inspect <expression>
4 d7 H5 i) }1 G: p when <constant_list> then" ~7 c8 N, q2 N9 q5 ]% Z) g* x
<statement sequence1>;0 E2 M. X6 ?+ f. h
when <constant_list> then
; X$ a U% j9 f' K1 Q <statement sequence2>;
: [" _" t3 B$ k" e. f3 j ...+ ]* d" K. a ]0 d* r. K. y
else
7 P5 H( N4 Z" d <statement sequence3>;7 D7 f" t$ O( Y- L0 f7 ^+ I8 j
end;
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(1) from <statement sequence1>! p5 r8 B1 y Y7 k( Z( k: Z" ]
until <condition> loop, @. `. L) T w* r2 Z
<statement sequence2>;0 {5 |: v9 v8 Y4 _- Z4 N% U8 d
end;- m! C8 t2 {* x: J: \
(2) while <condition> loop- Q0 X4 k8 a* T0 h+ D" e( o9 D6 c
<statement sequence1>;
" \( |2 ?' f) k+ U4 T+ ? end;
0 g! \* ?5 e. D8 H( w (3) repeat
% [& M' t1 M/ b8 p: y: _ <statement sequence1>;" M; A9 D. f$ Y' h" x5 @& w% O; ?
until <condition>;
& Z7 J+ V" F5 {/ i (4) for <condition> to <condition> loop
, J8 D1 P, r! u: y. f <statement sequence1>;
6 I8 G4 @8 {- m) A" I next;7 o `% e3 c$ l$ L
3中断语句
* [3 ^4 S' S/ p Y. C waituntil <condition> prio <integer expression>;9 F( ?5 D4 k* O' ?9 ]/ J8 r6 t
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以上为常用的函数！
; P A1 L% f3 O: O- N0 N还有很多，如有需要我把资料发到你邮箱里 " i+ m; w1 d, s3 F1 ~9 U* V
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