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发表于 2012-11-13 08:48:12
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1判断语句8 m. |" v& `3 j3 I4 X
if <condition> then, j+ Z: r; I( Q1 |' ^3 j
<statement sequence1>; ]: S' e# [5 I1 q7 ~
elseif <condition> then+ K* [- t7 b# X/ e, r8 s
<statement sequence2>; b/ C J7 m- s1 f1 y$ d( g/ ]
else
: t3 r* p" X+ H- d6 \5 f1 \ <statement sequence3>;+ b! A" m, V9 x. b. Y. R
end;0 i& \6 B) v9 Y7 E& k
如果分支比较多，用：
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when <constant_list> then4 B! b! c3 x0 G- u, D
<statement sequence1>;
: F& z# ^4 `+ M' N2 y! @ when <constant_list> then* o/ |5 W( r% o7 k1 {
<statement sequence2>;
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else. d7 Y5 n9 r5 d" g# z
<statement sequence3>;. {: `* ?. L6 a
end;
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2循环语句. R& B2 N/ o# B$ v) p2 H) C
(1) from <statement sequence1>* a% I6 L6 N% z& H: [
until <condition> loop
* o/ B% g5 T* R( K$ B" l8 \ <statement sequence2>;
8 u+ [- v/ C- j4 d: t$ E( S, L end;
; ~4 ]% L, v* `5 D (2) while <condition> loop
" v3 ` q- k0 A7 Q% q2 ]6 ` <statement sequence1>;# W. X3 e6 o# e' r
end;4 s+ V" O1 N# W& H! [5 c% P+ u
(3) repeat - [ @& s6 A0 u. m
<statement sequence1>;# }5 R, v8 q+ x2 {5 B( `) d% _* t
until <condition>;
, {) ?) i$ D, C9 _' s/ O (4) for <condition> to <condition> loop
5 _% L: X/ T* w0 o1 ]; c <statement sequence1>;
5 d x8 T2 e5 g' k! N+ Z next;
+ r1 m2 L/ y2 a( J3中断语句
& o: w( q' N$ T+ M4 i waituntil <condition> prio <integer expression>;( `+ o, f0 F( _: V6 u. z* I
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以上为常用的函数！5 ?: x% [5 J, Z6 H
还有很多，如有需要我把资料发到你邮箱里
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