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发表于 2012-11-13 08:48:12
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1判断语句' u; s6 M8 N# P; G2 @# N0 w
if <condition> then
# T& Z# ^0 m# r6 g <statement sequence1>;
- {3 b) Q/ K+ [* P" Y elseif <condition> then4 d) P( {7 t- D( N% @* |! _
<statement sequence2>;
8 h( |: p& ^1 r# p7 q+ X else 9 R' A5 U D1 B+ f* a6 l$ ?7 u! l
<statement sequence3>;' q( l+ j$ @2 B+ |5 k3 e/ H) ^
end;) ^ f; _& m9 s& g5 w/ j5 i
如果分支比较多,用:6 X7 A( g0 H- Y1 i9 C
inspect <expression>
0 u$ S! y0 h: Q1 O8 l5 x when <constant_list> then
( _5 m' l6 v- Z& s/ `2 G' l9 t <statement sequence1>;& q* s; [% i6 K3 E b) ]* y
when <constant_list> then
6 Q6 I9 n/ X" W0 l <statement sequence2>;
! A p' ~& g& S( K3 e ...
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<statement sequence3>;( k6 D- O+ p K$ d. C6 y b
end;0 K& E$ P5 K0 b6 Z4 g
* ]& b1 a) G! |* ~" T# G+ l2循环语句
" \; R* {: Y Y/ R (1) from <statement sequence1>
: j) k9 s- F L- i5 S until <condition> loop) U9 H' o0 I2 Z7 {- _. V& u9 J; e7 Q
<statement sequence2>;
: C( T- N5 m9 W/ g: ~2 q4 Q end;% A& m4 S, C. C c6 g+ X
(2) while <condition> loop
$ w% m* K$ A) _; y3 C) m <statement sequence1>;
" N; L% r' ~- Y1 N! a end;: m; A) w8 `: f3 ]! o9 m
(3) repeat ) V% D1 m1 n+ E3 F! v5 c% W
<statement sequence1>;* p! M y# v% h, i4 U
until <condition>;
3 P$ r+ b- F, ]1 Q$ Q0 o (4) for <condition> to <condition> loop
2 a6 M* S9 _! ^8 A$ L+ D <statement sequence1>;* m* b; U4 q2 @- O/ ?
next;
/ w2 h |, G6 u9 [- @6 g& r3中断语句
8 I" v! z' E! Z, l waituntil <condition> prio <integer expression>;/ a( a; d9 ?& M! N
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, r/ F( w/ x' }以上为常用的函数!
, H% a4 b5 I Q& h: @! E还有很多,如有需要我把资料发到你邮箱里 - a: L( {4 |6 {6 ?& B
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