我编的程序如下turtles-own [energy]
: L# k6 p6 B/ J: ]to setup Z* b# A$ V7 @4 _( W1 D( K; `2 T
clear-all
6 k1 P6 ~" u. C setup-patches
/ j" y9 P# A6 e, ^& T create-turtles 1007 B% B# p# z7 j* X9 H. ~
do-plots: G/ v2 C. v) o
ask turtles [ setxy random-xcor random-ycor ]# t2 U. [: n% j( n
end* O1 u' Z' \% h8 O i3 a' A$ D
to go+ X/ W" {8 M' Y0 W+ e1 ]7 `
move-turtles
. {1 i) p e; D2 d1 g% F+ p eat-grass. T; C$ b% s \) Q6 A8 W# m
reproduce
" i1 x( X/ `* k) K' U& j9 U check-death: o1 t3 M S9 O! E: p
regrow-grass
7 c( c! W$ {, V do-plots
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to move-turtles; s# A- ^% K! s) E" g
ask turtles [
' g7 `- |1 W# | e% [( e% i6 s right random 360, L$ Y, p4 W' w) y2 i% v! p# F) D8 s
forward 1) b& Z* d. b% e1 @
set energy energy - 1& ~1 i* K& d' D6 h- f
]4 \2 D+ Z/ o4 s! x0 o: W. H: t
end
/ P j6 C' u4 `/ J5 A! sto setup-patches, h* ^, m" X$ Q+ r3 s
ask patches [ set pcolor green ]
/ A3 D4 a% d1 A* o1 V* w- O gend
2 H- _7 O; n0 X& b0 W/ Ito setup-turtles
2 P# Z; N6 w; J; I* b create-turtles 100
% ?9 J7 d! d6 n% E8 N ask turtles [ setxy random-xcor random-ycor ]' _& P( Z6 R7 K
end4 I, ?! X- z2 h" t, x; h* j7 K
to eat-grass
- ^2 a# T& h3 P) ?5 ]3 g ask turtles [
7 Q, O9 t7 ?" _$ a) s# Q if pcolor = green [
! k% k8 |8 v0 C: w set pcolor black
/ w$ D0 V; k+ f7 |6 `; ^& d set energy (energy + 10)9 E; O& w7 F+ R0 S
]
; O- `$ u' ^' m' @0 n ifelse show-energy?
' T8 X3 y; R# }/ z6 p- r [ set label energy ]" V; U: e: }4 E! U( w4 v
[ set label "" ]
m, [! i3 U. ^ ]
& D2 Y i) G, Z; bend( r) @# @' ]; \& b) O O
to reproduce3 g$ S6 U3 l8 H9 \0 E% }. d/ ~
ask turtles [* q) }# D4 }0 K1 v- c3 K4 V
if energy > 50 [7 b% T# Z$ \3 S0 w
set energy energy - 50" P3 l! O" i: Q" w; y3 C
hatch 1 [ set energy 50 ]
. k8 |' O) a( b. K ]
" K" \ U: Y. Q2 t: ]( x: B7 I ]
1 s# M+ g% k' x i# ?& X# Tend. g0 B- f4 N' T, l, R5 b
to check-death# j8 H# D1 u5 ?* _$ P% `
ask turtles [7 L8 k- s/ x$ l2 E7 W+ @, m9 e
if energy <= 0 [ die ]) n2 _: L$ p2 v) d) n
]
1 ?8 i" V L! A$ F2 C2 vend
3 U5 ]! A: z# W6 l, W2 {/ Y' K* B$ nto regrow-grass& c+ b" A% D& `! U& B
ask patches [) ]& R" X9 D; t, k9 ]% M# p
if random 100 < 3 [ set pcolor green ]
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end$ C8 R2 X5 J2 g2 `- q5 D4 |
to do-plots
, e+ Q3 |- r- H5 h set-current-plot "Totals"1 T" c3 h# o T! ]! O
set-current-plot-pen "turtles"
* w; @# `( n# O! A plot count turtles9 [0 r5 _" N; O* \: C
set-current-plot-pen "grass"3 F) G5 Y7 W# I: R2 E
plot count patches with [pcolor = green]( a2 |% D: ~( e0 t
end9 S& A' P n! E# N& |; b @
可是运行时提示no such plot: "Totals"8 ~0 j. X0 P/ ?( T
error while observer running SET-CURRENT-PLOT; r3 G* L' L" u$ G1 ?9 c/ F
called by procedure DO-PLOTS( i* J1 U, A) f; J0 z+ L7 R. f
called by procedure SETUP( a& \& `3 W! u8 L7 O3 S
called by 按钮 'setup'
8 e' d# f L" ^& c+ A: s$ S求大神解答啊 |