我编的程序如下turtles-own [energy]' A2 C" C L. y2 J$ b l
to setup9 i4 R ]1 V1 }- J, n
clear-all/ g! Z" l& p; {: F, Q. {# R; k
setup-patches$ R0 ^. y. o; L. m6 p( E
create-turtles 1002 C \. A: p9 m$ d% W, Y. v+ u$ _
do-plots9 U; l R( h2 F9 F* U# t0 {
ask turtles [ setxy random-xcor random-ycor ]$ l! g8 w$ _% n- [8 }) p
end! c2 Q5 H6 T& l8 v6 N( B* G
to go# z5 D5 h& U8 a% o
move-turtles* ^. V; M' [. S/ m
eat-grass
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check-death
- L$ |* P) X# g7 l# X# x0 {9 ` regrow-grass" z' P1 K, }+ \$ Q; w% y2 q
do-plots
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to move-turtles- X' [ d6 |& k' \
ask turtles [3 }4 _- T6 I9 f9 O9 p
right random 360
1 I7 |/ K/ J- A1 {' U8 n3 M4 x, G forward 1
! j: P8 L/ n3 R set energy energy - 12 R |0 q, N6 i# @
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end
% T! l. C' |) I/ q" u% Wto setup-patches1 i" j3 \* r; S# @* A
ask patches [ set pcolor green ]4 B$ y2 {; l" z ? u( G
end- o/ o" m6 ~3 V- C- d1 [
to setup-turtles
4 ]7 [6 c# c2 t* y+ z; v- B% @ create-turtles 100
% a0 c! j/ M7 X$ |6 }! a/ h ask turtles [ setxy random-xcor random-ycor ]4 l0 t: q" i; j, l
end. K4 O* \* R& \" ?) c2 q" Z3 ~$ u
to eat-grass8 P4 l( X# x/ B4 x8 |0 W5 X
ask turtles [
. K e+ U5 L# V3 s if pcolor = green [5 f+ Z# X' d" s; v c- [' C
set pcolor black
; m+ H4 q7 J/ P$ g6 s set energy (energy + 10)
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[* J/ l" ]9 P4 z( U( f ifelse show-energy?" _% j1 I' ^- |0 R5 k J2 F$ V! g
[ set label energy ]
% Y; }( k3 _5 C# t* y' T [ set label "" ]% a) I& ~' s5 ?2 J' K" l+ L
]
1 P( B3 m7 y, K* Qend% [0 e% ?8 @5 e: |% s6 M) \' x
to reproduce
+ J0 h B2 t* U$ {/ J ask turtles [! @, F* a2 S* h& J3 e8 B/ c) Z0 u
if energy > 50 [# s, ]8 M6 Z+ S- O2 l
set energy energy - 50
" t5 c& \. ?# ]+ d' P. o hatch 1 [ set energy 50 ]- |! a' Q" i5 m" q2 a
]
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end7 P% I& D$ Y) e
to check-death
. d, g2 a% l: D& i& } _. K ask turtles [
9 m% x' u9 u1 K9 Y* v: {) A if energy <= 0 [ die ]
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end4 D# ]. K2 N" N7 ]
to regrow-grass$ Q4 O# U* N# y2 a; m+ z4 y. r( M: ]4 \
ask patches [
# n6 S* a5 H! f3 r3 A7 o if random 100 < 3 [ set pcolor green ]6 o$ u8 {9 r9 E/ ]! X4 X/ |- h
]: g2 E' D' u, F5 [; L
end2 L# I4 l5 Y8 O& Y5 H! r. N' ?
to do-plots$ S4 M9 {$ C/ A
set-current-plot "Totals"
: }0 C: r; }+ Y9 f+ D/ k set-current-plot-pen "turtles"
, i* ^! Z" w6 z5 g plot count turtles% N8 p6 u) y4 T! s
set-current-plot-pen "grass", }0 k- s/ V z# |- A9 ~
plot count patches with [pcolor = green]# y4 E C* n( P: p: F9 V" i3 r9 n
end
8 s2 d1 P* I' C0 p& z0 e可是运行时提示no such plot: "Totals"
2 q* n5 |5 x( i# f7 `error while observer running SET-CURRENT-PLOT
2 P' t& `: M( ~ called by procedure DO-PLOTS" V8 t" ?2 _2 r2 K8 h! e' N
called by procedure SETUP
\1 \4 L& K7 K& u3 }. D called by 按钮 'setup'5 }$ Q4 `1 {+ k! P7 o
求大神解答啊 |