我编的程序如下turtles-own [energy], j! l4 L l' T: d' y* r
to setup3 L8 A( z# z2 b4 D
clear-all
7 S# ^; R+ @$ `) ]/ o, K setup-patches* ^+ M) [% W1 @- v
create-turtles 1002 H% ]% h0 `. ~/ ^0 g2 s n
do-plots, Y% o* |) P# `* [
ask turtles [ setxy random-xcor random-ycor ]1 r, S& \1 w1 b7 y& w6 E! q; t
end
$ `" n( \5 H \ C6 C. l) w/ f. m7 zto go. N; q9 J5 p5 N0 ^/ V& @; @
move-turtles
( {! f1 q0 t( ~5 A0 c% ] eat-grass# I' B+ u/ A4 c0 K
reproduce" x$ L) c# a \) N0 [7 y! G
check-death
+ c4 Z! L# |$ g3 {+ P regrow-grass
5 `; C7 w2 X. L0 w0 ~( ~4 [9 j do-plots
8 M# s5 A! c/ R' K2 ?$ cend
- [* i% w3 ?/ X2 a1 H# Gto move-turtles
2 g5 N! v4 l$ R ask turtles [
; g0 K5 t1 g, o* H right random 360. r# M$ \+ m8 b* P0 W6 v
forward 1# T" [0 P* a v5 a. W1 Q4 _
set energy energy - 1
' u* ]8 w, }3 J# d ]
4 ^" I( Q* A+ k! e5 i o' @end
- e6 N" P7 L9 @8 {' sto setup-patches
2 b; F2 _" Z6 n$ L3 v* x ask patches [ set pcolor green ]) } n' ?" m8 g
end
. E8 Y) \2 C, Zto setup-turtles
" g8 x( t" M+ d! `" @, L+ [ create-turtles 100
3 A9 U' I0 F/ ?+ w6 s% O4 h ask turtles [ setxy random-xcor random-ycor ]/ e: W. e; {6 J7 }- c
end
$ j% p6 f x% ^9 y- u8 o( ]to eat-grass5 P8 @* d0 ~9 A/ J. c9 u$ H
ask turtles [
) l6 ]# n# ?2 m5 t if pcolor = green [" }- N, W) T) d5 s3 m7 N
set pcolor black3 z9 \8 J/ ]( Q5 c
set energy (energy + 10)$ l0 @$ O4 C0 t
]
. I/ d7 r* `) s! Y, ` i. @1 J ifelse show-energy?+ {, I; \6 C/ `- P
[ set label energy ]
3 Z, n0 ^; g; g; o/ n U [ set label "" ]
9 Q* h' s% k1 w/ ?+ o/ o0 x2 r& T* Z ]" O7 W9 C5 {% s& I& v; {$ [
end. f/ `+ w- y8 T. b+ s' s' w
to reproduce: d* B$ o3 ]* e9 ?+ _; o+ Y3 @& V- ?
ask turtles [
% _" B7 l6 E( ~+ P7 v; P2 [ if energy > 50 [
5 f6 \0 c. r- Y- |& ? set energy energy - 509 i$ X+ C1 r/ V8 x2 `; S5 r
hatch 1 [ set energy 50 ]! r; H1 E- w# Z9 f% v
]
: c- E* J9 D2 ^# _ ]
; l- g5 D- U# n) C/ d. hend7 f: F0 }# P, b# ^) g
to check-death
( `; N1 W5 t0 `, d ask turtles [
_, V+ X; Z2 x if energy <= 0 [ die ]$ m9 v% g8 u! o! f/ g4 i
]
( J+ Q' ~ O6 m2 }* `2 bend
7 x( ^+ |! w2 U0 V" q3 ?to regrow-grass, ]$ I7 F2 {5 T" F
ask patches [0 H/ g( {5 C' T0 ^2 k$ u
if random 100 < 3 [ set pcolor green ]
. E' J7 C9 C+ V ]
/ C2 Y' z( @7 Z. @& O) U4 Yend
* Y. X# A* f2 I6 Pto do-plots
* W' ^" ?8 O v [ set-current-plot "Totals"- w5 P2 N# H3 O3 h
set-current-plot-pen "turtles"
5 M9 u$ Q: e( v. ] plot count turtles- e& z$ Y1 N& u" e7 {4 c
set-current-plot-pen "grass"
j- L) g* Z) h2 { X plot count patches with [pcolor = green]
/ X" h4 ^4 r6 q3 h5 f# k2 j# S6 Kend
5 N1 \/ E4 m |2 S可是运行时提示no such plot: "Totals"; O' `, s" M- G* _9 l: U4 ~
error while observer running SET-CURRENT-PLOT
; d/ W5 V. K4 U& C called by procedure DO-PLOTS4 k. N8 S9 e% {
called by procedure SETUP
5 _. H& j! f' t* G0 n; \ called by 按钮 'setup'3 I* l! f" i6 R; W' z) C. |- X' R
求大神解答啊 |