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发表于 2013-5-15 18:03:34
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显示全部楼层
用FlowControl
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. r2 O `6 D, Z4 f& i' q" a大概是这样控制的:
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if SP1.empty then# \2 D. C4 D' z* j7 Z
r:=1;
' V$ H' M& i& e% r2 k5 Ielseif SP2.empty then9 ~9 i+ b: i; q9 R
r:=2;' W0 @/ N' }7 E3 I: _( ^8 M1 s
elseif SP3.empty then
# [7 Y+ \5 O2 ~9 f9 m: { r:=3;
2 u; |. Z& J' xelse: C! P2 L: h; j: k1 ?* k
r:=default_output;
* U' J0 z, ^- c) x' `, Vend;
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+ v& K; B% R5 p% J% ]return r; |
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