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发表于 2012-11-13 08:48:12
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1判断语句) Q# k! B" P5 f% f9 {' p
if <condition> then
, t! E1 \) t& v. C/ ?8 V' I; a <statement sequence1>;6 m6 L: U# O% }6 X
elseif <condition> then% X+ Q8 H+ U, D( e! o" L
<statement sequence2>;5 @9 v5 R. X3 Q$ D: V% `/ A" G, [
else
. I' b) T) S- {$ n/ R! I1 } <statement sequence3>;
/ K+ q) z6 G; U" n* F1 o- B0 ~+ H end;
* j1 Y$ C% b! x' g2 n/ `如果分支比较多，用：
, T$ f' ^) j2 I& D v& _. V, o: V inspect <expression>: H: @! F( c7 w0 s2 e
when <constant_list> then# p: C5 E" [ J: n+ s, C0 t) u% B
<statement sequence1>;: I" h8 O) {5 `
when <constant_list> then$ e7 \$ d* t7 ?# J" b! E& B
<statement sequence2>;
5 C- Q0 R% j# `) h9 v8 D3 S ...
+ O$ P% u1 N) n. ^6 {- H else
5 R4 h2 z4 }( T: z8 X5 n <statement sequence3>;& o, Z7 e' J4 n# M: s
end;
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9 r. F) A B4 \. j) n2循环语句/ [# [" W5 z1 p1 G) ]. i! O
(1) from <statement sequence1>: |0 t0 l- r, x! d
until <condition> loop ?9 P2 L% D' P# G
<statement sequence2>;
u# C6 t. K& N; @; T! U end;
3 { e# P* f: g (2) while <condition> loop1 G) s! q$ t6 M
<statement sequence1>;! F8 s) I: t% h6 S) Q
end;1 W: ~4 r6 [! {" J
(3) repeat & J7 R( L$ [0 V/ e; k6 E9 \& h
<statement sequence1>;4 Z' Z9 U9 I" n7 K( V
until <condition>;
. L: D; _. a5 Q& a (4) for <condition> to <condition> loop
, G3 N- G1 {' e l8 k" ] <statement sequence1>;
7 s( ~0 Y0 W; Q2 n/ s next;. {& E) g: Z) D% q' ]$ ?. n# z
3中断语句
+ Q* c% A/ O& e& v/ L6 F/ a, U$ G- P+ C waituntil <condition> prio <integer expression>;: K3 S1 L$ Z+ Y- k# u7 [
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. _8 f$ m. }4 b5 n以上为常用的函数！
0 R* @0 W' X( B5 s9 N4 ^/ E还有很多，如有需要我把资料发到你邮箱里 + I( `0 M }) h9 S
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