我编的程序如下turtles-own [energy]+ y& M( K- V" l# D
to setup
) q) o- g0 X r _' n clear-all
; X+ M) R. i6 t8 G, u, P0 i setup-patches: ^! ~* N- L0 f+ @! n! F; i
create-turtles 100
1 O$ ~9 [# d0 N& T7 _ do-plots) ^. p$ `" J% A, E
ask turtles [ setxy random-xcor random-ycor ]' \; Y+ q9 I2 P; _- a' B; H0 R( y
end
0 a7 @1 V# y" g+ k/ x7 Xto go5 H( a0 W, Q8 {
move-turtles. x+ D* i( K2 k8 q. s
eat-grass
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check-death7 `! q" S1 w7 Y) P. R
regrow-grass8 l j" t* F, @8 ~5 [) X7 ^0 p: m
do-plots
2 A7 l+ n1 ?# T( Z/ O O! nend
: p/ T7 [! o2 H2 Q2 vto move-turtles
" M( x* W) w0 _" R) ? ask turtles [ n1 d1 ~: z; Z: t- e: V3 Z
right random 360% h9 D3 f( U5 }& ]
forward 16 v/ a8 z; S, i) z" R# o; \
set energy energy - 12 Q, f- w- a# }0 \4 w& y# p5 ]
]
0 x. {/ z# Y+ `7 k) u' Tend
% p& F1 G& G6 R( lto setup-patches
2 @( l* o+ q, X0 n) |1 C ask patches [ set pcolor green ]
) Q+ @# n O% f! C4 u% p7 bend$ |: S2 l/ U# X! l; ^4 [- ]7 B; J, {
to setup-turtles
. {- H6 L' B' E/ q" U- }+ X. U/ d create-turtles 100. |# c, m7 V5 q& z
ask turtles [ setxy random-xcor random-ycor ]
+ l9 D1 [+ f; M( }8 b& ?" X: vend
) |8 q3 y9 f/ }/ w: s: l& ]to eat-grass' E3 v6 x' Q* M1 f# j& g2 n& d
ask turtles [
+ `" y2 l7 Q/ ^% C if pcolor = green [
F; i8 F3 W- n# k, ?5 q set pcolor black X8 b8 M/ r; m1 x3 w
set energy (energy + 10)% r' e3 U5 w" t& T8 ]4 ~! S4 v
]
+ C3 \) i9 O) D+ N$ `! s+ Q ifelse show-energy? y. g1 \! z8 V0 P9 _4 s4 z( l
[ set label energy ]6 C* _# `. e L" P+ R; c
[ set label "" ]
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end }6 d( M6 }' F X* d8 v
to reproduce5 i# Q, q, [) ^$ o; N: v* S
ask turtles [! s5 j% b5 M+ [1 u; B0 k, G
if energy > 50 [
' X. a& @; A2 P. A set energy energy - 50
! i/ `5 P% {7 H hatch 1 [ set energy 50 ]
1 V) k0 S' y) T$ E5 C' P ]
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end
, f+ K, X4 i" Mto check-death
, i! c2 Q: b8 O# Z: p, @ ask turtles [- {! P0 `, }% r+ L4 {: j
if energy <= 0 [ die ]. n7 h9 P2 d: [ e& _
]
( U3 T7 w0 J, r$ P8 p( _end* O. I- [& B* h2 w
to regrow-grass' k' p% n% L5 G
ask patches [5 w+ m) G; l V5 o( k) [5 H
if random 100 < 3 [ set pcolor green ]
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end
! h0 d# |+ {: ~- ?9 _- {to do-plots
. b3 d/ L/ O- R' ^) [' l ] set-current-plot "Totals"
! ~( g; O: p2 Y6 V M f& N; c, h set-current-plot-pen "turtles"
. T& U+ A5 ] `1 {6 u c9 p- W" \4 z plot count turtles
3 P! D, h: l6 X1 W set-current-plot-pen "grass"
- x2 B4 d, F) X/ H4 A9 u y plot count patches with [pcolor = green]& a. J# {) X) s8 v; p$ ^
end8 Z$ n* L$ n& |% \5 `8 d
可是运行时提示no such plot: "Totals"& q/ q- C0 y4 g. W1 G- q$ W
error while observer running SET-CURRENT-PLOT
8 [( n3 S8 b* q- H( ?% a/ T3 A called by procedure DO-PLOTS J$ P6 f3 S% T5 b( ~3 i1 C, W
called by procedure SETUP# f2 [8 u$ k9 I/ ^5 P% W6 C0 e
called by 按钮 'setup'
# F# O6 t9 h* X. g, }& n+ q求大神解答啊 |