我编的程序如下turtles-own [energy]# C/ S- V2 L9 F
to setup
* _8 _8 l4 c9 C3 t4 ]+ e clear-all' M! s6 `: ^6 L2 f
setup-patches
6 n- r: R E3 m% u# [ create-turtles 100+ S3 g @' W9 u7 b8 X- ?
do-plots
, O$ P5 N% E* g: X& B4 U ask turtles [ setxy random-xcor random-ycor ]
9 v7 w' a. X' K" o( Yend' G. E7 E. [. m
to go5 H5 i. h) D. \$ c; Q& C5 G& r
move-turtles
) _# `/ k& d+ r' x eat-grass8 C) s% p/ K0 e8 G8 I+ T
reproduce
7 M; c, O! o! ~9 I* ]5 | check-death
9 _- R h) s) V7 g regrow-grass
' H9 `8 o0 | ?# A- s do-plots
* I5 o3 B) n4 Yend; B8 Q$ {4 ]# [* G$ W! R# G+ C
to move-turtles
0 h1 b# \7 k b+ |$ a+ M7 s ask turtles [" t# u. z( {5 s5 P
right random 360
~4 d0 V' f7 f+ `' b% [4 E! S forward 1
- Y5 u f1 T _" x. }1 Z set energy energy - 1( p- n7 ]" ? N# z, G# l3 y/ m( G2 r
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end8 Q2 ~$ q! x# H3 \5 W9 m
to setup-patches L6 E5 [) h& S+ j
ask patches [ set pcolor green ]* [* N y! S. v" d4 H* r
end
) `) X9 E6 \" ]& `2 S% E7 Ito setup-turtles# ?. \9 M" @* U" q2 {9 e' R2 m- k
create-turtles 100
$ z. h- `7 d% d+ `5 o0 ]0 B ask turtles [ setxy random-xcor random-ycor ]
1 G8 C% X$ }3 jend: A( g0 o% D9 Q: n' K3 @9 _+ V4 }
to eat-grass! f- Q4 e( M5 A$ r) |
ask turtles [
& n& f5 V' ~6 e- E& Z4 v if pcolor = green [# l; h6 @: I+ _9 T2 U
set pcolor black
' d7 ~4 a7 R& i {9 C5 b; B set energy (energy + 10)! B( s' {& ]7 P& P+ b
]# B b* c1 [6 ~8 G3 s& x, g
ifelse show-energy?
, [/ a1 S3 ]9 N: C [ set label energy ]
8 Z2 d6 A* Z" l6 Q- d* G& M [ set label "" ]
. H# Q- z& B" t9 n* z/ c$ j ]4 |! G+ ]! \! ]8 }2 T' o4 k5 X E
end/ A6 _7 A0 h" o) ^9 O
to reproduce) Z9 R8 c3 w4 i3 s8 S! K8 ]5 e
ask turtles [2 }: {: H ^+ y3 c# x z: r
if energy > 50 [/ `/ x/ A5 ^: t* z5 ~7 h5 N
set energy energy - 50
2 _+ K3 a6 v3 _; c8 @9 u7 D hatch 1 [ set energy 50 ]
; X" p2 u+ I4 n ]& I. O' {% q6 ^5 A, k" X/ c
]/ K: x$ |9 _4 b/ i
end
$ Y. H4 o' N( @3 }* H- Wto check-death
2 D0 h) f& s* `9 f3 f ask turtles [
; V- \: M$ f+ l; N5 O if energy <= 0 [ die ]
' k# z5 o/ ~3 v- U9 }, V ]
! M) y8 \ _; L' P& p* G% _end ]& @/ y. R; C: L8 t2 k
to regrow-grass# x5 C8 ~' J. P( C
ask patches [% t4 T7 A5 _$ F% n. l
if random 100 < 3 [ set pcolor green ]
h* f; E$ i; ^. q4 Q( ^ ]
( [# I( r) M% u, z: @end5 T8 A* s" F( _* C ]
to do-plots
3 f4 q* v2 f/ W2 ^; z set-current-plot "Totals": u9 S" _/ G* C$ q* ]
set-current-plot-pen "turtles"4 O$ x: v; @ l# Z, c- K
plot count turtles+ V: i3 z- a1 N p5 [5 R I* k
set-current-plot-pen "grass"
, w+ \0 d+ }9 I plot count patches with [pcolor = green]
9 o5 H/ ]3 i- X; }$ n+ P" k tend
1 Q6 N% K# H7 e8 u% m" V可是运行时提示no such plot: "Totals"1 k, D. T4 b: M4 d
error while observer running SET-CURRENT-PLOT
$ J6 H" _) Y7 D called by procedure DO-PLOTS
* r( [8 a0 J$ o1 Q: [. _& g called by procedure SETUP& e f3 w8 t$ u
called by 按钮 'setup': c# g: C- x) C0 ~' }: U
求大神解答啊 |