我新调试好的程序如下,应该是对的,供参考
G9 r% x6 ~$ Q( l4 \因为特殊要求,这里的边的长度是二维座标内的空间距离
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to find-distance
* G# h s# m" g" ]8 _9 g. c let i 0; F, I8 ~0 t) j# N
let j 09 J6 a N( K9 {
let nodedistance 0& j8 O* @2 m- Y* d4 ^4 w2 h9 ?5 [# F
let linknumber 0
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* k, M& z2 q1 k& r1 E( k8 O1 {" Y while [j < count turtles]
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8 \5 v. ?, m, B( m6 L& H' o2 X6 @- | while [i < count turtles]/ A* Q0 M; u, b
[ if link-neighbor? turtle i
6 J3 ?% `6 Y# l* ^" r [ask turtle j [set nodedistance nodedistance + distance turtle i]7 }3 L" [ u/ R @) C
ask turtle j [set linknumber linknumber + count [link-neighbors] of turtle i]
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5 j! ^: O: e! W, v+ Y) d* u6 P# s, e set i i + 1
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set j j + 1' W; @- v5 }5 F* i& B4 u8 R
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set average-path-length nodedistance / (linknumber * 2)0 n: S) W5 c& V
end |