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发表于 2013-5-15 18:03:34
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用FlowControl3 i$ X! x, R& H% z4 C* H
! x2 ?' d0 S4 X. C. l% A
大概是这样控制的:
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if SP1.empty then
% p2 M) {9 O- M; Z$ P! ~ r:=1;
/ M5 U! y$ X( \, k9 Felseif SP2.empty then& ?3 I' a! p: K) }; {7 c' K
r:=2;
4 }6 z4 m0 g. T9 F- ~elseif SP3.empty then
9 A8 L# @5 K; j/ k+ i3 C r:=3;
9 e2 {: {9 `) o! @: |8 t* Belse" }% m8 y U X6 V
r:=default_output;
, x' K( ~' H; n4 u2 tend;
$ r+ ` r8 D+ t* q1 B0 J% C5 `* n. F; O7 W7 b4 Z( u0 ~$ v
return r; |
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