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发表于 2012-11-13 08:48:12
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1判断语句; J( u E& a3 j- `& k" z. D, G7 |( R. C
if <condition> then7 l% R1 G( g3 w
<statement sequence1>; n8 `2 v& X( d, d5 Q. I* T
elseif <condition> then
* L; B, o4 o3 H# a' T$ S <statement sequence2>;
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<statement sequence3>;" n1 b7 u) T9 O2 D' O, }- {
end;
4 c" ^' t5 j! z& F3 Q如果分支比较多,用:1 ]- o: X+ s. h& [3 H
inspect <expression>8 E- a0 b; l! O7 L" a5 Z6 W, K
when <constant_list> then
' _, c8 y7 \0 J# i2 D <statement sequence1>;
" h4 ^) m' g1 B+ ~, N* x+ | when <constant_list> then
& r$ N! ?7 ~$ N; z- P# P( C <statement sequence2>;
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else
* q* U8 {; Y" E' Z <statement sequence3>;
. G$ ~4 Q# L8 N- W- _end;
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2循环语句
7 B! I: }6 I3 e2 d+ C' K) Z) e& N# { (1) from <statement sequence1>
% }1 ^+ B/ ]. c until <condition> loop
: `0 T3 N4 y3 x <statement sequence2>;
9 l# L; E$ D6 w5 W4 r end;
) z* I; m7 f# }0 F; m$ t (2) while <condition> loop
* i: b" h7 U: a0 c: u4 W* [ <statement sequence1>;4 V& q5 {6 p( a1 j+ o1 P
end;( r% q! ~3 ?2 \
(3) repeat 4 i. |- G: _2 Z
<statement sequence1>;3 Z# Z/ O: Z+ I* p
until <condition>;
0 P; z) ]! u+ a! N+ E& S (4) for <condition> to <condition> loop
0 Q' @" ^% l/ c8 u5 p8 _( X <statement sequence1>;0 |* Z4 U; A. p1 s f* q1 A7 T# U
next;
7 U3 Y8 \* @, ]9 G. I- m3中断语句6 _) @! o5 {: @- r5 e
waituntil <condition> prio <integer expression>;# S% V# m! M8 s; [& {' q O
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以上为常用的函数!
2 h0 }5 o) Y" {, L! a7 M+ m还有很多,如有需要我把资料发到你邮箱里 I& T' \% @( n' k
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