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发表于 2012-11-13 08:48:12
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1判断语句
4 A1 A' A4 x5 u9 h: X if <condition> then2 G# T c% M6 n9 T4 a! x
<statement sequence1>;& p% r6 |. Z* r% T' z u& B4 Q
elseif <condition> then
0 n" _3 }9 x" q& R' M& i; q <statement sequence2>;
7 o& d7 X8 Y; Y2 U8 d- H else
0 Z) ^1 B% n, p" L: H8 C( U [# W <statement sequence3>;
" t- f" ~8 G1 a `8 S( Z1 k end;. H/ f$ A) S. u# @1 n3 T# c3 W4 ?
如果分支比较多，用：
) f# C( K/ W* k- K7 D inspect <expression>& `3 ^( P: K2 `3 D3 ~
when <constant_list> then
0 T* J- u8 h, B+ Z+ o! d <statement sequence1>;
C' e1 A9 Y( s, W when <constant_list> then
+ o+ F' ?0 L) { <statement sequence2>;
8 O6 S1 R& V' y0 e* a ...
' U z2 _4 g9 ?/ |# J# \ else
( Q! Z t G. {& _/ J1 O% T <statement sequence3>;
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2循环语句
) P1 \! d1 K8 v* n$ s (1) from <statement sequence1>6 t5 G+ h! z( A }- d
until <condition> loop
! ~0 Z. r$ f: ^( x* ?1 Z <statement sequence2>;
$ ?8 B. U( e: r% p end;6 A, n2 x$ U! G' N: o. Z3 p; A
(2) while <condition> loop
. a# _4 J. M* v& ?$ k <statement sequence1>;+ L: i) X) X( T$ Y+ x) J( F) k
end;3 n: {' Q5 F* o* `2 ~: n
(3) repeat
! E% B) i& o5 r' f3 U <statement sequence1>;5 D* s' `6 i; a/ C: Q( m. A( t& N
until <condition>;/ b5 J- s! g+ O* A O
(4) for <condition> to <condition> loop
2 S7 F9 E1 z, ?1 v <statement sequence1>;3 s% G) ?3 j/ P3 t" k& b1 v* f4 [
next;
D& m0 I- b/ S3中断语句
# y( E7 F* N1 D8 D waituntil <condition> prio <integer expression>;
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以上为常用的函数！1 Y% | Z8 p# x5 z/ Y$ l
还有很多，如有需要我把资料发到你邮箱里 % T8 d' J! D, M" M! G: n% }
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