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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句
" |. ~+ Y# o0 k, V$ i3 @- e, M' S if <condition> then
9 h# } G! r+ O, w8 n( L% o, } <statement sequence1>;0 ]% Y5 l. a; |; @; f6 P
elseif <condition> then6 G" X/ w3 Q" \: m) b
<statement sequence2>;
: R& {$ ~9 ]8 h5 ]. n! p5 H. R else
0 \! w2 D+ F o" U6 j, b( n6 } <statement sequence3>;
. R9 Q' w5 Q, k, S end;: {' e9 L0 ?7 T7 J3 i
如果分支比较多,用:# q+ O% O, G/ p0 q; I- A9 j
inspect <expression>
, |' ?% l( @9 c3 S0 O$ {( { when <constant_list> then
& z- s/ c6 s# s8 i: {2 ~, d; p <statement sequence1>;
. E; |" e& E- h k! q when <constant_list> then
% z, m% e y9 R5 u7 n+ w( [5 { <statement sequence2>;" s1 K6 M5 F9 @5 Q8 Z z$ F
...
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7 j% i+ b+ y9 ?4 P5 \& l' v3 T <statement sequence3>;
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2循环语句5 @: ?5 [4 O8 u0 V
(1) from <statement sequence1>& U* G$ S5 d4 K( f
until <condition> loop
- G5 K* x/ O1 v) K5 E7 B6 ^+ B <statement sequence2>;
t2 g0 \. x8 j# m. | q- G+ s* C end;
7 M% Q. W" A$ w, E7 t (2) while <condition> loop
. \- P8 p" ]. V5 Z ^ <statement sequence1>;) [/ U) z# d% R, o7 r, _- V2 ^
end;+ N8 l( Q- `. Y+ D
(3) repeat 0 j! }6 K) i+ ?. ?8 u2 f! V& \
<statement sequence1>;7 w( e) f0 _/ Z8 X3 b6 A8 D4 a. D
until <condition>;9 p* \5 |! t, E3 x( ?1 g6 z
(4) for <condition> to <condition> loop) ~- k1 ]( D3 G3 @4 Y$ [
<statement sequence1>;* K+ z# H' u1 b0 o4 m; a2 ?- g* [
next;
4 ~0 o1 ~* L5 @* d! d R9 C& ?) ~3中断语句
5 {: _' h; J' L ~& [1 y, S7 z1 W waituntil <condition> prio <integer expression>;
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! P2 A9 x9 c" d. l以上为常用的函数!
0 f: w X. ^* o* A; {; q9 H还有很多,如有需要我把资料发到你邮箱里 + {* w) D" y2 Q5 b, b6 ~( ~
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