我编的程序如下turtles-own [energy]
% l! Q! ?: `+ w% @) J$ w: Oto setup
% r$ J1 ~/ J0 Z! m0 D; ~ clear-all- D9 K @# C' w
setup-patches+ b2 R# {' q9 y3 t' ~9 {
create-turtles 100' o# D# y0 a% B$ V x9 k3 p6 c
do-plots, S |* I4 h) t( L
ask turtles [ setxy random-xcor random-ycor ]. L* @1 @* m+ c2 @8 w; M: R2 M0 y
end
5 R; _8 w6 n' y7 D! }to go
) c9 J) I& O" A# l move-turtles" P$ u! P* C+ g; z: _7 P8 b X/ n
eat-grass0 w, d) b% B T( Y) o! @
reproduce5 c( P9 z$ y7 H& s/ S$ e
check-death
8 H' H$ X. g- A regrow-grass: u# H$ q- M% I
do-plots
" b1 _9 r/ ]' {/ |end, l4 X2 R' y, [. g) V3 `' T& [
to move-turtles1 G- @" @& _ r7 l# u/ {# D$ m
ask turtles [/ Q# K! o$ R8 H+ i
right random 360) U. d4 M% H/ n
forward 1
1 ?2 C8 o0 R' y5 M3 f! L; U set energy energy - 18 W$ p1 x/ ]; B( H1 y
]$ x$ Z8 _# |8 s6 L2 [! K1 ]
end
4 ]" `! s8 v* h/ Gto setup-patches3 F4 B% T% N5 X2 l7 k" }. M# l1 B
ask patches [ set pcolor green ]9 {* w' e) R+ x m9 M
end0 f; m$ D7 k( a. y2 K- T! R/ i
to setup-turtles
. B0 j! w) P2 Y create-turtles 1005 j. K7 q, o% V! l- r
ask turtles [ setxy random-xcor random-ycor ]
* O8 Q4 ^ l2 Kend
' q }7 _) Z9 o4 I8 q7 c& {6 `3 tto eat-grass( t4 F7 p4 E, M
ask turtles [
* i4 L0 C" `. }( y if pcolor = green [/ H# g+ m9 v# y3 {
set pcolor black
2 f0 \7 W0 [" ~: J9 }1 ~ set energy (energy + 10)! h* N/ v+ V# i( f& x4 Z
]
' x/ W. J9 S0 X2 ^, s: @) f ifelse show-energy?
. @# M/ g1 r, P% G! q+ O2 P, L2 c( ~ [ set label energy ]8 o# C" w+ o6 @# {7 [
[ set label "" ]
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end* H+ c. Q6 @9 P3 X
to reproduce; k0 M, p* E% }7 }
ask turtles [6 W! K# N' z+ c4 G" Z, D
if energy > 50 [
9 [+ N8 M2 L$ P5 w/ u set energy energy - 509 b- q. s4 l3 w/ ?
hatch 1 [ set energy 50 ]
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]
1 Y6 Q. D+ e. h# e5 |# n8 hend
1 M) ~- ]8 B- G2 s# W$ b ^to check-death
0 n4 O1 |% q# f+ K/ y/ R ask turtles [* ^1 w2 I1 e- p' \/ q! Z
if energy <= 0 [ die ]
: Q* ?) S% L% J! G$ l ]* X6 Z9 B. @: k8 r; ]1 K. T* l
end
; G8 y* W: h+ P( O$ fto regrow-grass
/ K. T& N0 R* V9 @+ N) l# ]) F ask patches [9 R8 X( z+ z6 }
if random 100 < 3 [ set pcolor green ]8 `, h' n8 d: y: G
]
1 s0 Q8 _- \% b9 y# X6 qend9 [5 r Y$ _- P% m: B- W
to do-plots
: d$ ]' ~% a k8 _, }: x& `+ v set-current-plot "Totals"0 K- e/ `! N( q' J/ A
set-current-plot-pen "turtles"; B" }8 ]+ U/ J' S+ r& o. O
plot count turtles
4 o: W$ l2 Q: L ]) U/ ^2 L* t set-current-plot-pen "grass"
4 Y: q7 p6 ~! R' d8 \* q7 b plot count patches with [pcolor = green]
7 T; K* C7 b2 H- A6 u, a7 z- ~# Qend
7 Y! U5 {" S& ^& x可是运行时提示no such plot: "Totals"& f* O" O( l9 k% ^! Y9 V
error while observer running SET-CURRENT-PLOT7 e1 B5 B& c! R
called by procedure DO-PLOTS9 P$ i! A/ F$ _7 s
called by procedure SETUP4 \1 Q% |8 g7 H) X A, U
called by 按钮 'setup'
* j( F+ r$ {+ u2 X- ]求大神解答啊 |