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发表于 2012-11-13 08:48:12
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1判断语句
: X9 G2 e: Z% K: \3 n if <condition> then) b u# J1 e) J4 H; U4 s
<statement sequence1>;3 o) N5 r2 t" n
elseif <condition> then
2 Z2 k2 v. e0 D* E' ]+ R' @5 @' l <statement sequence2>;1 e4 n; u$ m( [2 v2 }6 ?, p
else e" T' @' u! z
<statement sequence3>;
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如果分支比较多,用:
0 l4 U; m* ^9 B0 O inspect <expression>
4 \* w! g8 _ F) ]+ A8 v0 c when <constant_list> then. j5 Z( @! a! l* r+ q" H# o0 }
<statement sequence1>;1 K5 y0 ~% {8 E; f
when <constant_list> then
7 @& G. W$ ?' ]1 {% S <statement sequence2>;
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. E+ }) O1 Q5 j* | else
, c3 ^4 R) `) B) f9 d <statement sequence3>;" E. d8 V8 g; z
end;3 W0 J/ S; E6 @' C" K! f0 j
0 K6 b; }3 @5 E) X4 C6 X6 [2循环语句
, Y( b7 ~% a9 O; g" m* t$ m (1) from <statement sequence1>
- _# l5 o8 B7 j4 \ until <condition> loop
' }7 s# H' \5 L& E( e <statement sequence2>;2 V, d+ q( ~( t$ F
end;
# d9 x) C5 V$ A (2) while <condition> loop/ L0 c1 P: y: B j1 @: A" I
<statement sequence1>;* B# j7 s) _: ~6 w) c; d
end; \8 ]! V1 f2 r
(3) repeat
" U0 B1 T9 ^, I: `4 b3 x <statement sequence1>;& l( w% X/ x( o# @& V" t$ h+ W6 X
until <condition>;
p- L. `9 |2 k (4) for <condition> to <condition> loop
, ?1 s5 X+ B0 T6 k) V6 q: T <statement sequence1>;. G/ t- a5 t- x% h
next;0 |" w& e+ d0 c8 a2 |
3中断语句 K: `. @" y- p8 i; S" k6 i# k. O
waituntil <condition> prio <integer expression>;
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以上为常用的函数!
( i( y) u0 I/ h% u还有很多,如有需要我把资料发到你邮箱里
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