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发表于 2012-11-13 08:48:12
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1判断语句8 i. I2 U) H( {5 h% W* @0 k* n
if <condition> then
4 [/ s: i: A' W, I <statement sequence1>;4 a/ {; r8 ?* i
elseif <condition> then- m8 M7 ?4 Q& t8 U9 |7 n- e
<statement sequence2>;5 k/ }0 a) e0 l
else
2 {, S$ g7 @% H L; J/ X <statement sequence3>;
0 v4 S( e* i9 Y1 q8 @7 ~9 y- P end;2 m2 ^) ?$ u; |
如果分支比较多，用：
H/ Q! ^8 r# t; a$ w4 P; F inspect <expression>
6 s$ L3 T9 {# b) V6 z when <constant_list> then2 T. L7 S2 p, v, }
<statement sequence1>;1 R7 b! R/ z) @& N, q' P% i3 _3 k" }
when <constant_list> then+ B y7 k8 G" D R9 B! }# L: p
<statement sequence2>;
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else) K g6 S @6 W' l. `
<statement sequence3>;
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) a1 E; t- K' N3 Y2循环语句
9 f, I; V- K) d$ g (1) from <statement sequence1>4 a( k6 d+ W7 I; o
until <condition> loop
3 c* t' o `" y* b1 l! P <statement sequence2>;! e6 A; `/ V- ~; E
end;) ?0 a. N2 d9 D8 T1 ]
(2) while <condition> loop
% \* z0 O& }) u& W3 X- i. J <statement sequence1>;
% _1 v8 @: I) G end;" e3 w) P, P5 F2 A+ N2 H4 P6 O2 [
(3) repeat 6 \( M9 E; T8 k/ e* c
<statement sequence1>;
+ n4 [% y. z5 J( O. G& e( ` until <condition>;
) p$ p, ~1 x6 w (4) for <condition> to <condition> loop
9 t1 ?( w3 R9 P9 H9 n! [; _0 Q7 F7 u5 B <statement sequence1>;* c( v8 O2 y" T1 \4 J6 Z
next;2 C3 {& ] f! c* g- J( Y
3中断语句# Y& ^; }- J4 q. |. K8 }
waituntil <condition> prio <integer expression>;
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) W3 v! R$ w* j1 f) J以上为常用的函数！
5 V2 E0 u/ d3 a6 T1 Y, v/ Q还有很多，如有需要我把资料发到你邮箱里 ; K( U* |6 H2 }
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