我编的程序如下turtles-own [energy]0 E4 T: i; x3 E, t" R
to setup- P( d7 ~. O; ]7 z1 P& n6 g
clear-all
3 f' B7 [* l- z3 \ setup-patches6 Z0 X; I8 `. f+ q' J
create-turtles 1007 Q2 f* V# f: @& d5 P: t. C
do-plots
7 r5 y/ u. S# F+ t4 U: y0 ~ ask turtles [ setxy random-xcor random-ycor ]
# V, D8 g4 a4 L& b6 q" Nend# \( U# ~9 g8 h# l
to go
7 d1 _0 Z4 ` W8 n# X* e. C move-turtles
1 f4 x+ Q6 N: x5 M# y7 |& r( ] eat-grass
, C7 m9 F) k1 f reproduce, m; H/ K$ |" Z# p) a
check-death
' S1 s/ G0 Q9 j7 f+ q regrow-grass) \* } j+ ~* ]3 j# y& x% j' j
do-plots' q$ ^1 f. ]) S I2 @9 h" ]
end
L) _1 v- u9 h- l# m; f3 ^% Y0 nto move-turtles A: m8 Q2 f) q8 s" @, |
ask turtles [
/ T6 u8 l/ y0 D/ f) E right random 360
3 h3 k" `1 T% U* Z forward 1
( U/ {0 h* N; N% I% X! _ set energy energy - 1
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end6 C J5 d4 R. V
to setup-patches
_. K; H9 A7 H% [' E ask patches [ set pcolor green ]. B( O* t- d1 v! a
end5 }4 v/ G7 q5 W0 V/ L2 S
to setup-turtles; z# m- ]9 q+ A6 |* ^$ n5 d8 |5 p. x
create-turtles 1004 H8 w; a9 L: q6 j) f
ask turtles [ setxy random-xcor random-ycor ]
# v/ r) g2 \ C/ m# iend5 n' @: k: k% F6 X
to eat-grass
: [; n7 k9 K& U0 O1 U ask turtles [/ K) d& U8 ?# m" M$ l' N* U/ r
if pcolor = green [7 `% v& [5 q: a5 P% S6 G
set pcolor black- U0 U+ ^; |5 _! o* h
set energy (energy + 10)
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ifelse show-energy?
- j3 ~% R$ W0 B# `9 Z [ set label energy ]' }6 K3 S9 w7 d2 @( \( @3 ]- @
[ set label "" ]9 R4 E* h) g7 t; b- D
]
" G* ^2 d4 \) Tend2 v5 S& O9 d6 R& k, Q
to reproduce7 e3 O, I. l# O
ask turtles [
; F4 _3 z( l3 |% A if energy > 50 [
. R r+ Y8 R8 y0 B set energy energy - 50
( E p5 |- q: S" k' ]( Q6 I, ]: d hatch 1 [ set energy 50 ]$ ~5 p9 C0 ^ a0 A2 C$ \, N+ O( r
]. B. V: a# m7 M0 l, w. x
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end% h9 _1 o; B8 M% ?( s" T
to check-death! S+ p1 k5 u4 a
ask turtles [0 U; F( Y' w! F9 e. q4 l
if energy <= 0 [ die ]
) R/ F S9 {% ?$ y/ A* p5 ]! y- Y ]
. m: e) r2 }5 ?1 `) Uend
8 A1 G; l( |9 f) y3 M. Ito regrow-grass
! [+ a) z5 o4 t& p, Z4 Z* Q ask patches [+ y2 Y8 t; D* y1 u8 X" N$ H
if random 100 < 3 [ set pcolor green ]
$ S s- ?$ w- v' f$ m7 j/ b% d) @ ]
4 u- m* {; Z0 c8 o! m$ ~end
0 }. E& |( v6 S+ `+ a+ yto do-plots
& F1 Z% @8 \2 C9 b- V4 N set-current-plot "Totals"
5 J- [" B" @ w* ~" ^* @6 B7 [ set-current-plot-pen "turtles"5 \6 T7 s \! z6 M- ]
plot count turtles; z- y& k0 c" k1 i; A$ @! L0 g% d
set-current-plot-pen "grass"
: w2 q; F/ [- T3 { plot count patches with [pcolor = green]
* O7 \9 `4 N$ D0 Cend
' U0 p+ O) a( h! v可是运行时提示no such plot: "Totals"
8 }5 I8 P8 y$ C# Oerror while observer running SET-CURRENT-PLOT
7 H% H4 V" h+ F0 [% @% o$ E. W called by procedure DO-PLOTS, G \7 b; x' q
called by procedure SETUP% a* I8 l( U& A! {) ~
called by 按钮 'setup'
! Y9 }' x- C3 H& C t, |' j$ f求大神解答啊 |