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发表于 2012-11-13 08:48:12
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1判断语句
: C. {4 Y9 N5 x# f if <condition> then/ T* f s) m- F8 D1 ?" r- d2 D
<statement sequence1>;
6 l: n' P! i+ N Z elseif <condition> then
1 e H9 g. o0 X# @; C* w+ S <statement sequence2>;3 {/ A$ |6 b. A7 z( Q3 a
else $ l% ]& u7 y. o' V8 s# f
<statement sequence3>;
7 X" P" `, c' X- J* i& e end;
- s" M0 B) L; H! f如果分支比较多,用:
! P+ ~2 v$ x: ]$ I* @% V* ] inspect <expression>
& a; X. w& q( a% _ when <constant_list> then
2 p( h7 ?2 Q" [+ v; m <statement sequence1>;7 p* F8 E' p5 k# n8 i
when <constant_list> then! h7 l+ b. u+ n' J7 Z
<statement sequence2>;
5 c7 E. N, V0 A" I ...
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<statement sequence3>;
3 `. M4 O/ Z) @, ^7 Qend;. N( T3 J; d+ G e3 t
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2循环语句# S6 a- s' V3 S* H8 G4 Q3 N+ r
(1) from <statement sequence1>" g; P4 l6 X+ U" D; J* y
until <condition> loop
. o: s5 E6 t) j% ] <statement sequence2>;
5 S* ~+ @( D4 n9 \7 _ f3 w. g end;3 C; j& R3 g" b R
(2) while <condition> loop8 P6 k' q0 V( X) \& A/ W
<statement sequence1>;! K- s+ V, t6 n+ R# ~, U2 i# b6 f
end;8 E% H+ V% D: i0 ?* Q5 p
(3) repeat 0 y1 v1 E6 l+ g3 i
<statement sequence1>;
- n" O9 D* e% ?/ q( _$ ^ until <condition>;
( V; u% K! h3 S2 M# q6 q (4) for <condition> to <condition> loop
/ q3 Y# `6 X: k" F <statement sequence1>;
, V" J& w5 l9 [ next;
0 i+ U5 l& P, h1 r: c* m3中断语句
! p% c5 ]' H i' K) ?! a waituntil <condition> prio <integer expression>;
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0 U) y5 m. X6 w3 @8 M& G `/ T以上为常用的函数!5 F: Z' I1 `. f
还有很多,如有需要我把资料发到你邮箱里 1 E1 `1 Y! x5 f' q
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