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发表于 2013-5-15 18:03:34
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用FlowControl3 t& V/ h; L, B2 p. g
5 g1 f# Z7 T* ~, w3 b" {大概是这样控制的:! a% s3 O, v' y: k4 g- r
6 K9 t1 S: _6 B1 {& sif SP1.empty then8 d' A0 l7 \3 o0 |7 X* m
r:=1;
- k4 g7 c2 }: W9 v2 z5 V/ eelseif SP2.empty then: v$ }( P& ?/ L: W
r:=2;
$ t- D" }5 k6 o. x* M8 Aelseif SP3.empty then
( \7 `7 p( g2 N+ D; Q8 I0 I3 c8 z# K; f r:=3;
% B! w+ I8 w* H+ W4 uelse0 b( a+ @1 C7 ]; h2 x( E k
r:=default_output;
! r2 W* T+ E! ^ u9 C6 nend;
V& _, A7 E! M# K: Q8 Z1 t1 A/ f( K% T9 R9 \% y* D
return r; |
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