我写的这个计算语句,调试时通过,但是运行时出现了不知名的错误
% o" e4 _) V4 h$ `1 `请达人帮我指出错误好改进& O1 H' d3 b- l! T& q/ }
, B7 }. |: ?& g7 `) V! qto find-distance" @' k9 _! h6 K! w" r
let i 01 E0 i6 Y- v$ F2 v; K
let nodedistance 07 E: \3 p. w. [/ Q; z7 R. _. h# U) i
let linknumber 0/ S. b% A. ^: A) k
while [i < count turtles]
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if link-neighbor? turtle i& U6 d5 C+ D" B$ a; H
[set nodedistance (nodedistance + sum ([link-length] of turtle i))
% Z; E2 L6 a q! U& R set linknumber (linknumber + count [link-neighbors] of turtle i)]
) r1 |0 m1 J) \. K' S& ^, m if linknumber != 0
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3 o% A9 Y2 u2 \ S set average-node-distance (nodedistance / linknumber)5 m/ |- N4 {, _
]
* S" @2 s1 a( U& D' r set i i + 1
. q$ ]: y+ |, ?" Z3 L# B ]6 P! O, M! y" P: f# A: X( J( N
end k$ s( ]5 e) l# z4 W6 R( j# c
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[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |