我编的程序如下turtles-own [energy]
7 A9 b$ p% x! N2 @5 m9 _$ W; e6 V7 ?to setup8 C% T) X6 P, A+ l+ m
clear-all4 f+ U8 ^1 T' @2 [& c
setup-patches
9 Y: i* K9 e* `5 I# X create-turtles 100
/ `' a. q; |# F6 Q3 |* b" X do-plots+ Y" e1 j) q# }" ?9 i8 A2 C
ask turtles [ setxy random-xcor random-ycor ]4 W( k( ~4 a C' }5 y A. d9 B
end& }" b0 N7 [8 R
to go
! C7 t( P4 `1 K8 n& B move-turtles. O7 @( Y$ M( M. H
eat-grass
3 D/ U# ]- _% v! H$ y reproduce
0 e$ w K. D) t; E5 D1 l check-death" }6 U1 H8 f1 E, d6 i
regrow-grass5 N% x& ~0 C* U
do-plots. t w2 l) J# M, i- s+ |. U- s
end
# O$ G4 w: W) `* nto move-turtles
+ w) H3 R* r# Q- Z: |4 } ask turtles [7 [# M1 q1 h l5 ?4 F; _! g+ \
right random 3604 }* t% k4 m( N$ D$ t- i
forward 15 C8 J* Z. q4 {7 O5 E
set energy energy - 1. W& ]) Q+ p7 L# n* r: y- P
]
% `$ u$ ~5 r! }) r/ O9 j6 mend* ^* ~& {* W/ |. ~
to setup-patches- I6 C/ H: _& J! g" x- s3 f: x; s9 D
ask patches [ set pcolor green ]
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to setup-turtles( K! U0 T0 a# t, Y5 f% J& ~7 _. ] @
create-turtles 100
" X" Y# i! t1 n' X6 d ask turtles [ setxy random-xcor random-ycor ]
: ?1 c0 }; M# Q; U0 N% N9 Fend( @6 Z+ U8 f8 u& z
to eat-grass
* \; }- U% \7 J# ^+ y/ u ask turtles [ c2 `1 |8 [" l/ S. x7 V" o% N
if pcolor = green [% U2 O* A3 Q7 [( a# H
set pcolor black- X2 p! H- V% E! C
set energy (energy + 10)
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ifelse show-energy?
# J7 S/ b! e0 m5 H. t7 y. [ [ set label energy ]
( X9 }& a6 a3 u+ S# d/ v [ set label "" ]! l3 Z* o/ W0 m" q/ h$ h
]4 z! `4 _1 v$ c: Q ^& D
end
6 G' j4 S) H, j9 Tto reproduce8 I+ U& M$ @% o" W! W( n
ask turtles [
3 E! x7 b/ ?5 ?2 \% o$ v# r. N if energy > 50 [
7 }/ S! Q1 S Z set energy energy - 507 E6 _! b; R( H1 g
hatch 1 [ set energy 50 ]
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: p% w2 s! B/ }% Wend
$ y9 ]6 U/ i T- Z/ dto check-death
, u' f" O K' N( x1 B7 h: G5 j ask turtles [) u6 |: f1 K3 S% e3 c1 b7 [
if energy <= 0 [ die ]2 ?6 G! x1 p. A- ]
]
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) [4 T- u; X7 K% e Lto regrow-grass
+ d6 _& J. V! o$ n V! v, ^ A ask patches [
% j1 ^" W4 M" [1 [6 B& ]* m" D if random 100 < 3 [ set pcolor green ]
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end
) y5 }5 L" C: c0 Fto do-plots+ F2 o" M+ r5 [& _$ K. O
set-current-plot "Totals"
5 `: d" J( v/ Z set-current-plot-pen "turtles"8 R# l! f: v' p
plot count turtles
( T0 ` S/ }; t! f0 ] set-current-plot-pen "grass"& N+ {2 b& q) d' u5 R
plot count patches with [pcolor = green]
. |. \. a/ g6 A4 k% e1 W$ Aend
( N# c( ^7 h0 `4 m0 U) R* j* Y可是运行时提示no such plot: "Totals"
9 H2 {% F; \! q" j1 Derror while observer running SET-CURRENT-PLOT
* b8 H9 @ x. z% V called by procedure DO-PLOTS \0 U& V$ A8 x3 N# P* m# A
called by procedure SETUP2 W* d- |% ?7 _6 v* _
called by 按钮 'setup'
0 t \. t" r( @. [9 Y求大神解答啊 |