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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
' S# D8 r5 b9 H& v if <condition> then
# L6 W7 Y) m5 G" K. c) I; o <statement sequence1>;8 \% ~: _2 T: a2 O
elseif <condition> then
/ E7 Q! \0 N) N4 M, l4 C <statement sequence2>;( A3 ^" u. G6 `" s1 D/ |2 o/ {
else # A& A/ b" F Y# `" ~1 t7 W" h
<statement sequence3>;
2 B$ X q+ W# j. c end;
S: B, ^; H! b7 w2 m) |& Z8 m如果分支比较多,用:4 @5 M( p9 m' O
inspect <expression>/ [- S. m2 i) b5 p# ~+ c$ `3 i
when <constant_list> then
2 A& F6 h: i" G; m V <statement sequence1>;9 W5 }; x% Y( n6 A# K4 a( n$ S
when <constant_list> then( p# ?* L* U* A0 k4 A- I* T' G9 H3 C
<statement sequence2>;! V+ t' p- W8 Y7 G; v. R
...# ^$ C; n, [' A, ^
else/ z' }& }8 m) H+ B' G5 Y4 `: O& @
<statement sequence3>;
; b) w3 T" a2 O& t* O. ^end;
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2循环语句/ ]8 t" f1 Y5 r; V+ v$ k/ Y5 ]/ c- w% k) U" k
(1) from <statement sequence1>' P0 Q9 {% Q1 m; i8 H6 F! d
until <condition> loop
, p* B- {9 e4 |" c <statement sequence2>;+ w# Q* @* u( `& o6 g* l3 M# ^
end;
3 K- a5 V% g0 J) Q" ]* w+ | (2) while <condition> loop; z/ Y n+ |1 {& |
<statement sequence1>;
' T9 P5 e' v# @" A4 C, ? end;
! D6 g' [: i" @/ k( a0 h' p (3) repeat
% g( k7 B( z. m( q9 M6 N) a' h <statement sequence1>;
" S3 p# m) R7 o until <condition>;
+ \" ^2 a- i7 ^- Y& i (4) for <condition> to <condition> loop/ T- N Z" w6 v- {7 n2 d' L& x$ P
<statement sequence1>;
, D6 o% e/ M3 X/ n) ^/ ] next; f! W- e: z2 m {) S8 G; h+ S2 Q
3中断语句
: c3 r: p+ g% ~ v0 U! D, i& y waituntil <condition> prio <integer expression>;% d9 p% |- y0 J3 g
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以上为常用的函数!
' J! _" N! h1 L还有很多,如有需要我把资料发到你邮箱里 - }* N. q0 p" q. I' m4 R+ D4 \
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