我编的程序如下turtles-own [energy]
7 M" R/ n; m! g9 c0 sto setup, ^! V# k# w N4 H" q$ h* y
clear-all
# e7 O) E0 q. }4 E, _! L setup-patches% ]* w9 f8 I' O, T5 `
create-turtles 100% M4 N* ^1 k6 r- B" u1 B. n
do-plots
( |7 V$ G2 x+ k; i' ^ ask turtles [ setxy random-xcor random-ycor ]% C$ k: u5 ?* l0 l
end
% _* I7 S, a7 Dto go
$ H, R2 c7 F J move-turtles
! K: F! O# s3 _6 \ eat-grass5 C7 i! z, v" S* P+ y8 v
reproduce
3 [0 o) m% s6 V4 z0 u) Q( s check-death
; h! ^, ]- I$ g8 E0 l regrow-grass
7 P$ P1 ]" U% f6 | do-plots
+ b; s5 M' Q, T7 b1 A# lend m6 {9 P `. r& ~# L
to move-turtles6 q3 H0 h& k8 B
ask turtles [
$ g. O$ s' p' {, y, k1 O* u( Z, S right random 360
3 C6 l0 N3 M, w forward 1( v; @+ c, M1 D9 t5 u. w) Y
set energy energy - 1& u8 m& r( a' K0 _6 E
]/ ], G1 i% k# u- O/ g
end
$ E1 T9 }2 {# h- }to setup-patches; [3 W1 s& V# M9 G
ask patches [ set pcolor green ]
6 v7 h! s, e- fend
& [, R s* e& `% K0 Tto setup-turtles
- p: ?7 V- Q6 q6 c4 J create-turtles 1006 X3 G/ F- M7 r9 g6 b
ask turtles [ setxy random-xcor random-ycor ]
( {: q% o* N6 ?: v& Iend
, \5 _0 X8 J% A* Pto eat-grass) [! u1 J7 A3 }& Q0 l
ask turtles [3 q" }- Q+ U `/ F. r
if pcolor = green [# S O5 _! n! `! \) Z
set pcolor black e# A( T8 t! ]- q' L6 }
set energy (energy + 10)
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ifelse show-energy?! _& D- ? q4 r, H8 W( J
[ set label energy ]6 V5 g' I4 m( {' p5 p, ~4 R8 z
[ set label "" ]7 s* _; g4 h+ s3 R/ u8 _9 A. N
]3 Y9 h% j% q) Q9 y
end
& _% i9 A4 T7 A+ T2 _to reproduce9 u# U4 G- n g, A) ]
ask turtles [
- @7 Z& |* d3 Z' c if energy > 50 [
# J" ?1 O$ m, a# @4 r H set energy energy - 50
5 D* D. x5 K+ u3 [! M. X hatch 1 [ set energy 50 ]
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]% L1 h; h. K8 T* x) i: s- X3 ]
end- x3 p. X& C0 }) f/ g% s
to check-death
& t' w2 L) T1 G. n6 X% t ask turtles [0 v }: F' r( {: _
if energy <= 0 [ die ]
. Z3 c7 P- x7 F) s/ U ]
5 {, F. n" J- _& O e# V& Rend1 v& B2 d- n( K5 v( L- S
to regrow-grass {% {3 c) r2 E$ k( h* M" v
ask patches [# r2 Q% `5 Z0 N! [$ @: f, R9 ?
if random 100 < 3 [ set pcolor green ]
# @# n: L, R1 Y6 ] ]% A! _7 E# m, G: |, ^& v. b
end) }: Z8 W( O3 M/ s0 d6 @
to do-plots
6 f# p7 r2 X9 P9 K% M% A0 o! v set-current-plot "Totals"- f3 C6 O9 m! M3 g# m3 C
set-current-plot-pen "turtles"% i* z" V% f7 m3 p# K4 h. b3 C
plot count turtles
- ?; N( }' p' R# X7 \, v9 o# W4 | set-current-plot-pen "grass"
, {) b) f, G% C; y" \3 K plot count patches with [pcolor = green]* Q, S5 J. }- u5 D( `
end G1 |7 [4 H/ \
可是运行时提示no such plot: "Totals" }; r! t2 Z6 e# |6 B, D; E3 |; s5 V
error while observer running SET-CURRENT-PLOT1 g' B2 @* \3 i
called by procedure DO-PLOTS
1 m% {8 y/ @; K called by procedure SETUP
" P* O1 K4 q2 }- X called by 按钮 'setup'
" s8 N% C2 i+ ?: ]5 P" j求大神解答啊 |