我新调试好的程序如下,应该是对的,供参考7 \) B( z+ d8 f2 H3 M, Z
因为特殊要求,这里的边的长度是二维座标内的空间距离, \5 a9 ^, w9 @: W
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to find-distance9 ?5 F* y, d' y- n
let i 0/ D8 t) ?8 C( r: _; W! |# x V
let j 01 V9 w3 Z6 B2 x; k/ C; ^' `
let nodedistance 0
% T$ m, w+ f/ l* s6 u. t let linknumber 0
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1 A n: k7 I9 r/ ]% a c while [j < count turtles]
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while [i < count turtles]
: @; @& k5 n* o; @7 ` [ if link-neighbor? turtle i1 X8 ~% n, W' E1 c
[ask turtle j [set nodedistance nodedistance + distance turtle i]% |2 A) S& C4 }: X w. o' l; b o
ask turtle j [set linknumber linknumber + count [link-neighbors] of turtle i]
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set i i + 1
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set j j + 1
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set average-path-length nodedistance / (linknumber * 2)& h: `% X4 P* R1 c* V
end |