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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
. w% S3 o. p# _: p+ H+ _6 p, O if <condition> then b0 M# g- e5 |/ X; @
<statement sequence1>;
9 g8 p+ _' _; ]2 {/ R9 @0 { elseif <condition> then
) v8 G0 j3 k/ U5 |$ V$ @. f7 \ <statement sequence2>;( X. _! X5 i( W; F( n
else
) A6 q) [/ B4 {* @# F, [5 b) L <statement sequence3>;
V& F8 i0 I, U( D9 F, w end;
4 j) E7 V$ d) V3 S) o; n. l如果分支比较多，用：
" ^$ }3 r1 Y: _ n* t' Y/ U% ? inspect <expression>
0 s0 F% {6 g* g( E4 Z( Y3 P when <constant_list> then( f1 D# W7 ^3 [! W, P# [1 @7 C
<statement sequence1>;
/ Y& E; {9 i' @ when <constant_list> then G7 b, d& P0 C) q3 ?
<statement sequence2>;' |9 o! T l- ]: d% b3 ~; o! {
...
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<statement sequence3>;
! V& R0 I8 O3 j5 m; I5 [7 i1 {end;/ }" k3 ?. Z7 [4 _% ^: f
7 Z% r4 R: i& \# r3 Y4 s" G
2循环语句
4 t# l3 n1 [1 R: r* U! |0 L. ^- a (1) from <statement sequence1>
6 D7 g5 [* R" s2 g' D/ `$ x l7 Z until <condition> loop
) U4 n3 C7 H4 K( c- t9 a- q/ x <statement sequence2>;
2 u5 Y4 `5 J- ~& _2 C! j end;
2 ]- \4 `4 R1 y8 n (2) while <condition> loop
4 F* V7 f* x& o" n9 y! u9 ?: } <statement sequence1>;
* {' o. p9 J4 U1 m+ j7 m end;
" j' T: y0 y( m9 S+ e& R1 x. d4 x (3) repeat
. S: r/ _+ k/ J5 j k# ?4 p" P- q <statement sequence1>;
7 v2 m7 k; a1 A5 |6 s5 u until <condition>;) C# y+ s6 b9 H% f) {9 k
(4) for <condition> to <condition> loop7 y: x& H- c; R' `
<statement sequence1>;! M$ M0 V, W |& t3 U% D4 @
next;
' i+ Y7 _8 ?1 |3中断语句" M5 o' F3 y: F; i8 V
waituntil <condition> prio <integer expression>;
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以上为常用的函数！
" n+ V' U8 a4 Y+ M, F* h. }还有很多，如有需要我把资料发到你邮箱里 . A, U. F9 M) Q+ Y/ i1 \/ J
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