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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句- }. I# T/ @+ B
if <condition> then* s; [' d& f) Z' r3 n% a! j
<statement sequence1>;7 U& ~3 E$ z5 d! v8 O2 X' ?
elseif <condition> then2 @$ d/ N. f* U% |. n
<statement sequence2>;# I' g/ D; C% K( w- M
else
( m U8 ^( K+ W/ s- Z <statement sequence3>;
# ~. D! N% m7 u! e: |. M end;" y1 \/ F, ^4 q' J# G
如果分支比较多,用:
- Q( u2 U. T$ O9 U9 Z5 Y' v inspect <expression>
. I# ?) _1 |2 L5 O0 y) {$ L" S. ?8 O when <constant_list> then5 ]2 U0 w6 T% ]" O1 P9 D C
<statement sequence1>; v; r" `+ [' T- b! `" Y J" u7 }
when <constant_list> then
" O0 _5 ~' _+ t. s0 c1 Y( o <statement sequence2>;
' a! W* ?/ [, m! Y, T8 P i) O m+ | ...
x/ n( w* I8 u else
# E, p3 o% w% L" n/ Y/ \ <statement sequence3>;7 ^2 ]& v1 S' C' b- S+ z; V
end;, k( ]" d) E- x, H# Y
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2循环语句
( t+ y0 X9 U e0 S6 R( R5 I5 M (1) from <statement sequence1>
7 g9 s4 [ d- V7 w1 {1 M until <condition> loop
' K5 Z7 S$ b9 |# S <statement sequence2>;
- a/ Y: f' C' C9 h$ ^5 I end;
5 O) [) ~- l- \2 r" V7 F E/ E! } (2) while <condition> loop
% I- g9 O7 r5 ^. H0 G P6 a$ S <statement sequence1>;
- i! C6 p& H& Q0 I end;
" q# v" J! v& T2 h* i (3) repeat . f( H# t) u0 @9 Q
<statement sequence1>;! L5 b2 Z/ t/ e# L: h/ M
until <condition>;$ v+ U7 [; _2 d* q$ O, V: e& G) o
(4) for <condition> to <condition> loop, f( i) R- e( v4 l( d0 K4 h
<statement sequence1>;- t/ l4 d1 K* c1 b
next;
& z. `5 |; G1 \7 Y3中断语句
$ r' J# A( Q+ f0 \+ C4 Q% A waituntil <condition> prio <integer expression>; `( T1 e' A. N6 G6 | {7 W
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以上为常用的函数!4 |5 P; V2 |3 a* Y$ u( z5 K3 S$ D
还有很多,如有需要我把资料发到你邮箱里 0 @0 L1 l8 d1 ]) M! U- x
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