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发表于 2012-11-13 08:48:12
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1判断语句% Y1 _% Y4 E; o/ b: k
if <condition> then( r9 v6 Q) |2 v6 ^ t
<statement sequence1>;
& E5 Q, ^2 ?) ]* i elseif <condition> then' R1 n) V) Y5 e1 Y+ n9 n1 e8 O
<statement sequence2>;
- @" ~7 z$ ]8 D$ M else
7 t' i3 K- d: m) K) R3 b <statement sequence3>;* L2 J* J/ p) E+ c1 h4 a
end;
" B- [) {2 e0 y/ P如果分支比较多，用：# c7 r& I2 c, l# p% o
inspect <expression>; |& M$ k' s6 y% {
when <constant_list> then$ i% u6 a- V+ l$ ~* _% t% k5 n% p
<statement sequence1>;: a, q! N% c; Z" |
when <constant_list> then
7 f, A5 }. C: S+ o/ e6 M <statement sequence2>;8 ~, F R# b& f& ~
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else4 b' i c2 S. p! Y W- ~1 r
<statement sequence3>;
% x9 m; Y l/ W5 Y2 Xend;
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8 c7 L2 u: F, L6 q6 }2循环语句; P% ]- \" b- t
(1) from <statement sequence1>- ?- F7 R6 B2 ^% A1 F6 I4 m
until <condition> loop
, J* `$ ~$ V3 z0 u, v& N <statement sequence2>;
' c0 o6 t2 I5 E: ~+ w end;% I: ~- T! ^8 r1 n
(2) while <condition> loop/ q2 f$ L/ x# P# b" K! U/ O$ D8 Q Z
<statement sequence1>;: M }- }" e' k" a7 Q
end;
5 t3 }+ A( j$ M3 E9 C1 w4 P (3) repeat
$ n; x. C' `7 }- y/ s- v+ k& ] <statement sequence1>;% s7 v0 G: `/ L# p6 l8 N' k; E
until <condition>;
5 s/ Y7 k( S: A4 m- [1 ?$ V z (4) for <condition> to <condition> loop
0 Q& y7 [ A0 e' i% f <statement sequence1>;
3 Q% i4 [$ B+ _ next;1 @+ p3 d& W7 y% k, G- Z. Q4 A& \
3中断语句
& l! e; w" c! ~9 r! ^ waituntil <condition> prio <integer expression>;
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1 c& f. y7 [$ U8 I D以上为常用的函数！
- _3 u, f4 e& P3 J" z还有很多，如有需要我把资料发到你邮箱里 0 Q7 j7 ]& n# b& A# X
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