我的程序如下: + @8 X# \) ?, B% D ~7 kbreed [dogs dog]/ Q3 W- E& M# ?( U: J
breed [cats cat]0 H" L) S' c; Y* i. L1 g
breed [cows cow]" `! h$ H2 I" U; y# h
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to setup + c+ h3 t: M) f6 A m4 _6 } clear-all0 F& v& h$ [5 `/ q' l3 X6 v- {
set-default-shape dogs "dog" ) `0 U# p3 Z# C) Y3 \ set-default-shape cats "cat"' i$ A( A& V; w9 o
set-default-shape cows "cow" . \' g# |% f' L1 D$ }( H ask patch 0 1 [ sprout-dogs 1 ] # f9 c8 ]5 l/ K) M9 V& j- w1 s" A! x ask patch 0 0 [ sprout-cats 1 ]# s* f6 V+ Z- [
ask patch 0 -1 [ sprout-cows 1 ] ) L( r4 }1 [1 v- rend 8 A! N$ V. c) G F* F: O/ |! H( R$ u! v" c; C1 h( G# S: o) g
8 E+ v4 e @9 K5 e! z这个是netlogo自带模型库里的模型中的程序,我新建文件再将其输入却提示错误:* C4 R3 w2 T* `$ T# @
error while observer running SET-DEFAULT-SHAPE in procedure SETUP4 B: {3 L! i- m1 B9 V
"dog" is not a currently defined turtle shape! I. \+ e) f& h
(halted running of setup) 8 c0 [2 L' T3 ?5 c! U, t0 R$ H3 r+ d" f$ }
7 t6 K4 ~9 w4 C l0 p" p1 P( O
我用的版本是4.0.4 请大虾们指教下。thanks!