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发表于 2012-11-13 08:48:12
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1判断语句' k/ p$ q( @9 |7 f, x4 V
if <condition> then# `8 D. j. Q: j$ ^
<statement sequence1>;
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<statement sequence2>;: @4 \2 N. U9 y* u l# p
else . Q( t3 x( A5 R# u" M; T
<statement sequence3>;8 A/ ^1 {3 n" l, i8 N J
end;; L4 F3 e, w9 V$ b( c b I4 x r; ?2 a
如果分支比较多,用:
7 ^9 C! S2 A4 ]$ d. O/ Z& i inspect <expression>
9 h6 j. U3 T( W' g when <constant_list> then
& F" }4 R9 ~2 v/ y6 e( k2 i <statement sequence1>;5 G! q- H; ]1 C0 u0 S0 m3 r. S
when <constant_list> then0 p* e7 U/ o M" k
<statement sequence2>;
$ g9 G& h8 V. P. H ...
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<statement sequence3>; b" M1 r8 |* V" @3 t
end;; B$ g# c3 ]5 P9 `: E7 }; ^
+ P6 |) f7 S6 ^7 a- `$ B: z2循环语句
; X( m$ X( p9 ^$ e& ] (1) from <statement sequence1>
, S3 f& s$ n" l2 Z) q until <condition> loop
7 u) l+ j: b- ~4 \/ Q( R$ \1 i8 k <statement sequence2>;2 @4 _" W7 J3 h" U- e
end;
' M( K- h5 }- E' v (2) while <condition> loop
' z3 x% t S+ e, w: { <statement sequence1>;
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(3) repeat
- f/ _8 Q$ \- K8 a/ B2 V @/ G/ D <statement sequence1>;2 L$ D8 s5 V: w7 K7 E: s( f, {
until <condition>;6 t9 N0 H) l+ e, j( _2 U8 h
(4) for <condition> to <condition> loop4 e4 Y4 \) @1 \5 o
<statement sequence1>;
9 X/ p9 B4 ~3 ?- h next;. v6 C* }3 J+ j9 `/ h" D
3中断语句, Y+ J: U9 r( x$ |! r
waituntil <condition> prio <integer expression>;
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以上为常用的函数!6 X8 W1 Z1 v# q4 R
还有很多,如有需要我把资料发到你邮箱里 . F. B# ~ y8 i! ?+ S7 h& O
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