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发表于 2012-11-13 08:48:12
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1判断语句
G* B% ?7 ^0 h0 w `1 S# O if <condition> then
0 l) C" s+ k3 G8 T+ {( i <statement sequence1>;# z7 ?3 Q }4 M* |
elseif <condition> then
% v9 `$ h; D8 } <statement sequence2>;
, {, ?$ K. S# ~; K+ K else " X5 O6 M- r' g$ J; ~4 X- ~. w# x
<statement sequence3>;
! A) V( j( W1 T, ? end;
, H! p. s+ ]# ]7 w' q8 f如果分支比较多，用：
, m' `% q/ S! W1 p$ x& | inspect <expression>7 r2 N: A% `6 _5 y0 u
when <constant_list> then: `+ y/ M8 |- Z) U
<statement sequence1>;
. l' M# c3 ~8 `( Y8 D when <constant_list> then7 D [! p! N5 m& ]9 ^7 U7 X
<statement sequence2>;- u$ f! b: g0 t# B( U k
...& P0 K& ]. g w% X
else5 V% s1 A, ~9 k( y* A2 t
<statement sequence3>;
1 x( p& K) o5 t$ f& G2 mend;
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2循环语句 Q! m8 z' Q' C6 S4 o1 e
(1) from <statement sequence1>2 w& X; R }4 W0 h
until <condition> loop
G2 ^ T! {# i n4 X- m# z D3 B+ \ <statement sequence2>;
7 h/ u0 |2 b; d end;
" P( n3 E" ~; V9 M# B (2) while <condition> loop' q+ n, o: l0 H% C4 Z9 B
<statement sequence1>;/ b& t+ a6 x7 N5 _. f9 f
end;
+ q, q/ N6 ]4 b7 Z. T/ p (3) repeat + v- u" R1 h5 q/ m2 I4 N' _
<statement sequence1>;
2 {5 O$ x* h) M1 R until <condition>;
8 v" Q' w' r/ \# L! u (4) for <condition> to <condition> loop
; b9 m( N1 g# x' u6 k <statement sequence1>; l: G0 v* d0 a5 G5 w8 |
next;
2 _$ O- \3 x. F( S3中断语句8 ~' p8 O) i$ L- D y
waituntil <condition> prio <integer expression>;6 L% d7 p! N! c# s* K
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以上为常用的函数！
, R, W* O) H# ~ h" _. T6 {还有很多，如有需要我把资料发到你邮箱里 * ?0 i6 _# p [) ]' T- b
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