我编的程序如下turtles-own [energy]
1 Y; T2 z; c' F! xto setup' d+ x, d& E( p: k' t, a
clear-all! x5 f0 B! M! S9 S' k( T( S* q+ D
setup-patches2 z( ]: r2 x" D5 G/ u) ?
create-turtles 100& U/ Z" N3 H1 ^- o
do-plots
7 n/ D2 z5 U( i) \) S! a ask turtles [ setxy random-xcor random-ycor ]# z" M* f1 y( [" [; n2 B
end V* A' V! M; l k( z& T a$ @' v
to go
8 G. n3 H5 f# l# V) _ move-turtles
8 W3 c- q, e+ c0 } eat-grass
( j* W, \: U" u' ^- h reproduce
' T2 _& J' Z# A; l) E8 G" R check-death
' S2 K; J2 |& i3 k% S regrow-grass
2 j3 B9 v- v1 v* _! B3 L do-plots/ g- r2 M$ v- i6 l: o+ I/ {$ [
end
* ^2 D+ }) F4 B) \- ato move-turtles5 e4 u$ N" x s- E5 R, R
ask turtles [
# C' A& I: F2 N7 p/ s right random 360
! _# d. z3 d! x6 G forward 1
" Z' \+ x" @# G3 u' |. U set energy energy - 1
3 f3 r) N( v5 c- Z ]% a# G% u- h; Y7 k! p! M a
end- \6 z; h0 L# E2 K8 m( E
to setup-patches7 k5 T) V! T4 c' t9 J; s* c1 ?
ask patches [ set pcolor green ]
% s" O$ ?+ m( k2 }0 yend
8 f6 V8 i/ e/ V8 T2 u7 qto setup-turtles
/ M" l z8 B/ |6 I; v create-turtles 100" {& I7 k$ t2 L9 x0 w
ask turtles [ setxy random-xcor random-ycor ]
/ |' K0 y1 r* X8 {( |9 |end% v$ r5 h; M2 D! H
to eat-grass
! i/ N3 l2 s5 D$ r ask turtles [
, D1 g& C) G6 `, Q ]1 |5 D8 j if pcolor = green [
2 T) u4 k/ e5 J& `! \# _0 D set pcolor black: x5 t( j! e2 a
set energy (energy + 10). Q! i1 _3 ~! v. F }% C
]+ b t4 V7 E2 c/ K
ifelse show-energy?
8 @6 T5 E- b/ F( V$ X [ set label energy ]" w( \; v J$ ^7 c: Z& x" B* V
[ set label "" ]
* `: s6 ?; x8 ?7 y, _& @# h ]6 f) R9 n7 p$ [
end
# A1 H {; r$ O& g% P# E _: Ito reproduce
* e$ J3 M/ H3 d ask turtles [
8 @3 j: h5 `. Z: x* [, s/ s if energy > 50 [6 F* @9 E. B1 h# ~
set energy energy - 50
; N. w2 j) }' b4 c hatch 1 [ set energy 50 ]
7 ^/ v( h& i# F0 [. p ]6 U2 a4 u# Y" b$ P* `6 M
]
% F- s9 u" f- o: o/ d& b9 |end
# f+ R2 O5 V( \" \7 \to check-death6 Z+ \5 H$ X- J L7 \+ q6 S% U
ask turtles [6 e1 U: k# b2 ?; \2 o8 K1 [6 }8 v- i
if energy <= 0 [ die ]6 H" q. b$ I. y
]
4 j3 ?2 ~8 e' [- o& oend9 H. n- v, W2 s( `
to regrow-grass
; R$ \2 V' ?& p, { ask patches [, ~3 j7 R+ B7 ~2 E u6 u
if random 100 < 3 [ set pcolor green ]% {* n" u$ {' e, B
]$ y0 b: r8 X0 r4 v- q e) M
end3 @. D* J w! [- r5 Z# p
to do-plots/ s+ ]5 ?. b' Y- ]) O. D) r
set-current-plot "Totals"& {# m% W2 f# s3 J
set-current-plot-pen "turtles"1 B9 v0 _) ]4 l: Q; A9 S
plot count turtles- `1 ]1 G5 _% s4 B8 l
set-current-plot-pen "grass"- y/ ?. ~( F6 j$ A0 S+ {1 l
plot count patches with [pcolor = green]
( Z7 @1 p, t9 {, xend5 V+ U4 z+ X' v. F2 G/ f
可是运行时提示no such plot: "Totals"- n" @* G* |7 n7 o4 Z" H9 S
error while observer running SET-CURRENT-PLOT
& j+ h4 x4 |; b& r4 J called by procedure DO-PLOTS+ U4 u9 o) Q" F+ j5 ^
called by procedure SETUP
5 i+ m' s# N* l' w- E called by 按钮 'setup'
. J1 `5 y" }0 ?# f+ A4 s& ^: L s求大神解答啊 |