我编的程序如下turtles-own [energy]
$ `# O1 ~" ?" w, Wto setup" ?1 A6 Q( B& S: N# X8 J+ P
clear-all
D6 T. A) D h8 [' Y/ Z setup-patches+ ?/ d, J% r. S1 M0 H
create-turtles 100
U4 M0 V* B, P+ \! J$ U do-plots. r. n1 S8 _, V9 E. w* q% l
ask turtles [ setxy random-xcor random-ycor ]8 k6 r1 v3 Z L$ y# \' E
end% B0 `( |& |$ Q' Z/ ~, s, J4 G6 \4 i
to go
4 b. j$ K7 Z6 j/ c) j4 [2 p move-turtles
$ w0 ~- y0 G/ o" ?, P: F! x, S eat-grass
9 |5 L/ u6 ]* A! a9 W reproduce3 E! H; B0 q4 U3 S
check-death
3 [/ o$ T" O0 C- [: z- [ regrow-grass- ?" U- ?. D: t2 l; l6 t
do-plots E/ d) e6 c7 Z3 R# u# e) m1 P! g9 y
end
0 A# L9 I& C3 p+ D# vto move-turtles
% L" k. z% e6 R1 ?( p1 b ask turtles [
3 E1 _2 }5 h | right random 360
8 m( V3 O9 s2 H1 r4 ?+ v6 {, X5 S forward 1
8 d& f# u6 d0 |' K set energy energy - 1
: ? q9 c+ S- \! T+ w ]
# P. x: ~- O4 [& J, qend
) o7 g: p4 h+ n9 x/ K! Q/ ~to setup-patches' e; O" p z {: h! S
ask patches [ set pcolor green ]2 ]9 W) T4 `6 l
end
0 ~: [. y; d D7 [7 \/ i& q& Cto setup-turtles
/ p. q1 V" K; T3 N& F create-turtles 100/ f! s7 E& t( t) E9 L
ask turtles [ setxy random-xcor random-ycor ], h! V* \4 S: v0 z" p- S: B
end9 `/ g7 M$ y- s. Z* |! h
to eat-grass
2 \9 t ^% A4 U ask turtles [
+ B8 F6 O* U" ~' z if pcolor = green [
6 `+ y# |$ x' s1 J set pcolor black
8 W5 C, j0 M; R# ^: S; c set energy (energy + 10)$ L ?6 `- q$ ~0 E Y2 J
]
7 @) m9 N! c4 f$ k, F U/ A; S1 `, s ifelse show-energy?
! G0 k: H4 b5 G& @ [ set label energy ]
~8 y* h' y1 x7 B$ x; W [ set label "" ]
; R/ a( g' | Q9 ?: T% s ]
3 a% A; @" B8 M( e* z: o6 qend; Z/ |$ X; h( o
to reproduce# P4 t* ]; A& F* m: F7 H' L0 K' k
ask turtles [0 t+ T2 c: f8 q
if energy > 50 [1 O7 F0 b9 ~- Z; G5 N; J$ t* U
set energy energy - 50
7 V( M# o J& P8 @) Y' k hatch 1 [ set energy 50 ]
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]
* l" b1 v' L6 N! jend! r1 X X: N/ ]* }- X; P
to check-death' j& ~ k- t0 A. P
ask turtles [
1 O0 [ ~" y, k& ~) s5 B3 Q9 s6 W+ z' H if energy <= 0 [ die ]5 f( _! k5 h7 @! x% T" Y
]' G5 w( i. A( D& t- ~
end
9 ~$ ]# p. E) {: |! F& W4 a! O/ jto regrow-grass
8 P% I, x p- { ask patches [
0 v, B2 E! w$ }. R$ _ if random 100 < 3 [ set pcolor green ]
1 [: x* u, s$ a ]8 V7 J* V" k' S& L3 {# M
end9 u5 D* ~! g' c* j x; z
to do-plots0 z# q! u" f# [
set-current-plot "Totals"$ h% _/ l- w/ T
set-current-plot-pen "turtles") V' S. y3 C1 }4 g9 d5 U
plot count turtles% L8 Y; f, C9 [
set-current-plot-pen "grass"' M$ x1 D5 f! F* p3 Q6 x4 N
plot count patches with [pcolor = green]
b; `+ V3 ^6 Z7 d: v# @end5 U8 R' i/ U4 I! b1 c
可是运行时提示no such plot: "Totals"+ u, T1 q6 n9 N6 S" Y I
error while observer running SET-CURRENT-PLOT- h( A! G* I8 p$ P- j" h) _0 T5 Q2 N
called by procedure DO-PLOTS
5 s- t9 l1 }. V$ P" G0 | called by procedure SETUP5 {9 e8 O$ o7 h- _" B% H6 h5 D
called by 按钮 'setup'* t6 ^/ k0 e3 [, O8 }* d3 `4 E& ]
求大神解答啊 |