我编的程序如下turtles-own [energy] F/ Z4 S4 u, E: x' Y8 y
to setup! B& {3 N7 M- ]4 h! q7 J1 A
clear-all
3 |* x6 w0 U$ @% v. D! A setup-patches1 x( v0 T' o _% N& R( V
create-turtles 100) O( l2 ^+ X+ i- n
do-plots- |5 C [, p8 ]' P
ask turtles [ setxy random-xcor random-ycor ]
9 ^1 O1 a/ @& D- send
3 v0 Q7 s- `1 I0 Jto go
! G6 s* Y+ ^$ [+ l, C4 g; h move-turtles2 M4 S6 k/ a o
eat-grass& X" {# @6 a( X6 O
reproduce) M- G, d# n1 F& z( a
check-death
0 g+ \) O7 Z7 V& e$ L3 F9 \( `& S regrow-grass
5 a1 [6 B7 [% r# _ O% g, Y do-plots
6 @8 T: }# i9 t: m4 `end3 H) j$ z3 U$ W- T: l! N
to move-turtles- E, t: i/ i- ]' m1 }
ask turtles [5 u% K4 [2 f8 p
right random 360
) @8 q) C& Y6 o forward 1' Y4 c( D p2 \
set energy energy - 1" n$ A4 a, g% [( N( m: X% K
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end
9 O* n& }( m, y3 xto setup-patches
4 N: y' E% H* U9 y ask patches [ set pcolor green ]
1 ]8 b# v$ D7 _0 yend" @. i" S# D/ F1 p0 E
to setup-turtles+ R! ]2 t D3 k
create-turtles 100" o+ U$ h, A. Y. M4 [& g% F
ask turtles [ setxy random-xcor random-ycor ]3 U/ y( g& ^7 H p
end
9 `% q4 c& N+ R5 E& h8 u( uto eat-grass# F; G: y% u( p) m' L9 {
ask turtles [
7 B; c9 G" H, Q8 ~ if pcolor = green [. z# R4 G* L0 n( c& g( H
set pcolor black
6 A3 d. Q, a9 l2 V5 }( c set energy (energy + 10)* m6 P0 G! r; f2 x0 o* J0 ]2 E0 b1 {" z
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ifelse show-energy?
- B5 T7 S3 ]) q- r# i6 E [ set label energy ]
+ I' i7 d* ~) o [ set label "" ]
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0 w) ?2 q' Y$ R+ X8 q5 Lend( C7 s: ~5 _! n+ c
to reproduce- P3 b" A! U9 O* Q: N
ask turtles [% o: w, {! C* r3 N! X9 q: e
if energy > 50 [0 r; y, j5 ^0 y. ^, J2 Z5 k
set energy energy - 50
; E$ s# F( o1 d2 k* c) Y hatch 1 [ set energy 50 ]
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]
, P; n; G+ M' c- K5 J+ f) ~3 jend( a W; v8 ~% N; C8 T) G$ {
to check-death
8 R: W& r9 g6 M1 z: s, x. ~$ C7 c8 X ask turtles [% h& d2 `1 i5 c9 o+ S5 x5 w$ u, q
if energy <= 0 [ die ]
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end
8 \8 z+ j4 j' M8 Dto regrow-grass3 Z0 `$ r5 c& b& L" @' P+ j, X
ask patches [
. l" m, v$ _! d" U if random 100 < 3 [ set pcolor green ]
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: x! R8 H1 M. q/ S1 }end6 Q% G9 x+ ~4 d9 d. C+ O9 p
to do-plots
4 U0 g* Q0 O3 _* y' } set-current-plot "Totals"
) x( C' |6 c% k+ R6 o+ K" ~0 P; q set-current-plot-pen "turtles"
; s5 Z" A1 R' Q) P9 p; |0 `- M; X plot count turtles6 O; a1 r# Z; C& Z D* l
set-current-plot-pen "grass"7 |! p2 A b# E/ k+ t
plot count patches with [pcolor = green]: s+ C# m. p4 k
end
4 P( b" T$ p' ]9 g- b( S' p可是运行时提示no such plot: "Totals"! b/ o# W# p& ~$ ]) o3 |7 ^ s% [
error while observer running SET-CURRENT-PLOT* W9 |' ^6 `! m9 b% S% u* b
called by procedure DO-PLOTS y0 |0 t1 t% i& E. Y
called by procedure SETUP
; I. m6 j2 f8 s8 A6 n2 A called by 按钮 'setup'
! W+ J% z! r6 z; N/ e" K求大神解答啊 |