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发表于 2012-11-13 08:48:12
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1判断语句3 m5 m" W' q$ J3 ~* G, ~( [2 e# l& ^
if <condition> then7 o3 G5 G3 c1 [: t0 _! I! p- D
<statement sequence1>;0 l5 }5 a* i. d3 [$ G' f) l
elseif <condition> then
& `: e- u& n6 Z+ n+ z" p/ ]3 A <statement sequence2>;( E5 q- |6 w+ t. T% \
else
& d* p3 x5 _/ Q' |3 P: e6 t6 m <statement sequence3>;" j/ f+ j% B7 I5 U% `
end;
: `9 r! X! Q: | U如果分支比较多,用:
& O$ }, q) \# O inspect <expression>
8 M u s5 k7 i G when <constant_list> then: c) q7 g7 _6 Y; V" t
<statement sequence1>;9 x$ G7 n G. d" d- z; G# f
when <constant_list> then
7 Q" F( a" U( x1 R/ e1 @+ c% N7 Z <statement sequence2>;
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else- \; X! z' k6 W- w
<statement sequence3>;$ @; P; [2 v8 s N
end;
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( ~0 M. J5 a# `, h! p2循环语句
9 |) [- t$ P: g, i (1) from <statement sequence1># e4 J& {8 n5 O i+ q5 s: U
until <condition> loop" o! K8 ]. ^& G" P9 U( j/ N6 ]
<statement sequence2>;1 U1 L5 f1 G* `! P" n& a
end;8 S, q9 W7 Y' l
(2) while <condition> loop
1 r1 [. r: h. P$ Q# J c2 k <statement sequence1>;
) @; N5 N. b9 M/ k- t7 \ end;
- X% y6 X, Y1 S (3) repeat 4 W8 b4 r) o8 |
<statement sequence1>;6 z4 D3 t# }9 b, Z# ~
until <condition>;
" i* B" }% h6 y (4) for <condition> to <condition> loop
- A8 ] v. ?% x6 }; Q4 n <statement sequence1>;' r4 c; V: g7 @2 d" n V; n& w
next;; p+ p9 N3 \7 o8 i
3中断语句
" N8 M- I" n- E6 D8 M$ X' h0 n6 f waituntil <condition> prio <integer expression>;) x6 u$ d+ Q& P/ A2 F! B
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9 | n8 w! {+ E% d以上为常用的函数!
4 S; v( O) S5 @. d8 r5 n7 m% C$ x还有很多,如有需要我把资料发到你邮箱里
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