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发表于 2012-11-13 08:48:12
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1判断语句- O9 _! h" o0 c# @
if <condition> then
. X( W# F8 p3 D& w <statement sequence1>;' D) K) ]/ Z' U5 B% q/ y
elseif <condition> then% r$ }5 W7 e- p) a
<statement sequence2>;
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<statement sequence3>;! }7 d. R7 U8 x
end;3 c2 Y1 L" }: K; `+ L
如果分支比较多，用：
; X1 P; S0 s9 W inspect <expression>
- x, G6 v- \% B$ x5 p* Z: b when <constant_list> then
! l3 w4 Y% i# i <statement sequence1>; F5 {7 _& B I4 u1 R9 s
when <constant_list> then1 T1 M3 K- M. M& G1 N1 q
<statement sequence2>;/ X0 G( t4 s# X% \: C% x% |6 }4 a
...
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<statement sequence3>;
3 Q7 Q* _/ j- h) ]: D6 @$ |+ uend;
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9 s G" @8 ~+ O! S9 e2循环语句
( A# B# P0 \5 Z/ p, e$ r, w& } (1) from <statement sequence1>
2 Q" b' L u6 w6 H1 p until <condition> loop* B, J* [2 J% U/ {9 [
<statement sequence2>;% Z: {* F$ k# J5 _! K' M
end;; @" z8 [" @ W% _7 ~ x
(2) while <condition> loop
& g. ?5 x7 F* h# k8 U/ R3 f5 v+ r" ] <statement sequence1>;
; p# c$ w6 d- ] end;
# \) a( }& v* @) I- t0 p (3) repeat
% C' O6 q6 @0 z <statement sequence1>;
' A( z: r# o% W4 J2 f9 J until <condition>;
- r2 t' l. i7 C: o6 S+ p (4) for <condition> to <condition> loop
* b' g' U% O+ U <statement sequence1>;' W8 u' O& b7 E; o3 Y
next;, D/ X- y# W3 U8 E. D
3中断语句, ?* V# ~5 w/ B4 R e( ]
waituntil <condition> prio <integer expression>;# ]6 h. R' D7 z) S
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以上为常用的函数！1 t$ W2 U# ^& t2 f& f
还有很多，如有需要我把资料发到你邮箱里 $ C7 @3 F: c- p
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