我编的程序如下turtles-own [energy]
t. l: j4 X$ Q! m" {to setup& z# e. S5 S) I' r- T! L
clear-all
" s; a1 {& K4 ~+ E& @) G7 j3 j setup-patches, O( |, m6 x4 Y% j' F c+ Z
create-turtles 100
6 F7 v9 h. ^% T% ^: x% G do-plots
0 l! @3 v8 f2 P3 i+ k; j ask turtles [ setxy random-xcor random-ycor ]
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to go
( o3 n' H5 t S move-turtles
! p* B2 y) f+ p4 j% ?5 ]0 R( G5 D, X eat-grass
7 X. ?: n; z: k9 q: P reproduce
$ j" }7 o2 S; e$ |$ V& T check-death
) A; o- S( M* k7 K regrow-grass: [/ L) q0 i) X' i3 I, J
do-plots( p" t. a# e! U7 j/ d0 K+ C& Q- F
end9 L) p# x- L% J* i& T" ^# C# @
to move-turtles* ^" A) b0 |' a3 x: e6 s8 P& N
ask turtles [
/ r. }6 E5 {4 w5 Y4 O1 \ right random 360( F! Y4 u2 W" R* {* p! N
forward 1
. h3 _: c O3 |! m3 L% v! _& B set energy energy - 1
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to setup-patches
( t0 v3 B& s# T" \, | ask patches [ set pcolor green ]6 ^$ ~% y' `5 L2 [ a
end
' B6 r4 g! t8 N0 M' ~/ C9 w. sto setup-turtles
/ s: W# v9 s) K$ p* m. b8 c create-turtles 100% z; S3 {. ^6 w3 f' M! }& n
ask turtles [ setxy random-xcor random-ycor ]
2 ~" f9 N, z4 D- Dend5 ^) N" I0 a$ J5 W! d9 Z
to eat-grass/ J- d0 D# b" X0 d
ask turtles [6 H {; ^: J/ r1 S, C1 w/ Q2 K2 J
if pcolor = green [
# D6 X% T6 F& C! L( ^2 ? set pcolor black
! |4 ~+ r, K' s, E set energy (energy + 10); A6 @7 H1 v) e
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ifelse show-energy?! Y$ {- S7 e; @
[ set label energy ]6 Y# N6 B5 ]( j; c% D1 n
[ set label "" ]6 Z% r _1 f9 }% W. m8 J# F d
]
" G9 a# p# a ?0 M1 mend- Y! W, z3 r( n* O1 S$ F! B
to reproduce+ M! ]( ]5 w; R* q* ]0 p% w W
ask turtles [
' |: N% E2 E+ D if energy > 50 [! |8 z6 X8 u9 W; N
set energy energy - 50/ B- r1 b/ g* B
hatch 1 [ set energy 50 ]
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end
- o4 d! D! L6 }) K" }" J Oto check-death
& {' G, e; M4 U3 q, i6 J ask turtles [) v: u& ~, A0 D4 l6 Z3 A0 Z5 y
if energy <= 0 [ die ]6 u! Z/ h7 E u& E
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end
0 ^" T9 H6 k8 @$ K) s {9 vto regrow-grass. v8 ^( J$ @8 D9 D( w; z
ask patches [4 B6 ^$ u3 A2 ]) p3 ]
if random 100 < 3 [ set pcolor green ]
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end9 Q! J. q; J7 V# s% Y# ?! H
to do-plots
" s4 b; V$ s8 x0 y! f; j* i% x set-current-plot "Totals"% K q1 c. a- x# P( g- v
set-current-plot-pen "turtles"
% a9 X' z9 G! a plot count turtles3 k) M* z/ Z2 P2 a
set-current-plot-pen "grass") ?* D/ ~8 g/ c
plot count patches with [pcolor = green]& P+ g; g& V8 ?$ P9 t( o# e
end
. ~0 W& y- ~; \( n0 p% F {可是运行时提示no such plot: "Totals"
; W9 `) L/ d7 y" i+ x4 u3 Z4 L" gerror while observer running SET-CURRENT-PLOT
" p4 x9 M4 @4 A+ \ X e called by procedure DO-PLOTS6 Z* t* \9 L& |, y! L1 u7 [' [
called by procedure SETUP
P/ @0 P! S1 h0 \1 G! \7 Z called by 按钮 'setup'
/ {/ s- E/ G1 P% b! I: }求大神解答啊 |