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0 E$ n, _1 c7 W8 s
请达人帮我指出错误好改进. ?- W3 `$ f. K# o# \" m# K
; I, O O6 A8 I0 vto find-distance" ~) t7 Y8 i2 m4 b4 Q* U1 p
let i 08 g, K" S: O- V+ q4 h
let nodedistance 0
4 F- O/ m* S0 L% j( S/ l$ B let linknumber 0
( j, J4 X7 d | while [i < count turtles]
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if link-neighbor? turtle i
, b5 \* M0 p) R2 \+ C [set nodedistance (nodedistance + sum ([link-length] of turtle i))
/ ^6 \& a7 b2 F* l# w# ] set linknumber (linknumber + count [link-neighbors] of turtle i)]
_* w" u: U' @ if linknumber != 0
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set average-node-distance (nodedistance / linknumber)9 E' Z2 E# m1 f/ Z( g \8 _ a
]
% w' K- L3 w6 M set i i + 1/ G: Z) H. o6 G9 U1 N" ?7 q4 V
]' }: V/ W+ t$ | e( V+ c, ^8 A9 T* V
end
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# r4 K/ |4 v$ p8 W[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |