我编的程序如下turtles-own [energy]8 ^( f* u9 j) e6 F5 e4 s
to setup0 q, R. Y0 L8 x: H* p5 J
clear-all
3 _/ z3 C X, P% A0 b setup-patches0 ?: ], v( o$ R2 ~ \
create-turtles 100
: }0 y1 B' F- v! `% | do-plots
' A" o* j0 O8 \$ @* y7 s: w' w6 q ask turtles [ setxy random-xcor random-ycor ]
2 G/ Z3 a* M+ B ^7 w$ R2 b Oend
# _" }$ C( j( P- C- I/ Kto go
$ a1 O* ] H ` move-turtles# P3 W+ E8 Q' a% `. l
eat-grass
) o4 Z* C \# L1 |/ y0 \! \ reproduce
; V- h5 n% I1 Q% j5 K check-death
! N4 q7 d6 M. d+ S6 W regrow-grass' Z; } T/ G8 p) T" K" D
do-plots: e& Z+ S. @+ h
end
. U! b' Q+ [6 ?) dto move-turtles6 {& e0 i0 G) e5 I- h* E
ask turtles [
6 k" x% K4 `5 J6 a right random 360
# W9 s0 h0 o: s/ |) s8 i2 P forward 1
- Y4 S+ s( b0 }$ b set energy energy - 15 f% T5 C* n7 x7 |' _! P$ H
]; o# B& K Y' p! m( K
end
: j2 M: T/ H% K% `" z1 W R( tto setup-patches2 p; P1 }5 a# D u5 w) W+ E
ask patches [ set pcolor green ]
, Z# W" p: J; ]* u$ H2 z; mend! |8 R' L; ?' U+ M. B/ D' `$ ]- H) h0 G
to setup-turtles2 c- o0 b f7 ~3 K
create-turtles 100% w5 y2 g: Z% w, j, E: |$ [3 i
ask turtles [ setxy random-xcor random-ycor ]
( i) E; n2 d% w* |end
! t7 d9 W9 ~! c5 `: Tto eat-grass+ x; Z* b: \9 k1 \6 n
ask turtles [
" l: _# O; s9 T+ Y! k* H; c if pcolor = green [
4 K2 x' L6 l" h3 l; `& g+ b* ? set pcolor black
* T4 m/ U( H5 E C5 { set energy (energy + 10)
?5 B5 r# _9 y. q# s% a ]9 W! j$ ` ~ a$ E( {
ifelse show-energy?
! z6 \2 L! J$ y: ~ [ set label energy ]
, K/ P% h4 m9 w$ w" m [ set label "" ]! z) k/ } m) D4 x: I# K* u" y+ ]
]9 w4 l! J, n9 X. H! c2 }
end
# H9 n4 u7 q8 q" z; _. eto reproduce
6 {4 a$ w7 Q: D( ~( o) ^ ask turtles [
) s( q$ m6 |9 Z: R) X+ n if energy > 50 [ C- I* _) t: H, G7 Y
set energy energy - 50
; q! B X( c8 |; ~ hatch 1 [ set energy 50 ]% a, ~& O, _: a
]( x, S* _ R6 l* \
]
# E' |( M& _5 [, F0 X: bend
; r. f9 ] k, c+ ~to check-death7 s4 @ T1 R. }
ask turtles [( ?9 m/ W& ^0 x$ s( S9 F6 B
if energy <= 0 [ die ]
- ?3 v! n2 ~& N ]
+ R$ V+ N D1 E; `; xend- C* q2 Q0 ~; Y! e7 N; d) }/ g
to regrow-grass
* _5 _$ B& o! G8 U3 T( m ask patches [! L: ?( u7 P% z. q
if random 100 < 3 [ set pcolor green ]# L, _- G7 c) N* B% |5 \
]* E) c1 l( K X5 }, Q6 @
end
$ f) P& }, N7 ?% z2 S4 gto do-plots
6 Z+ ^2 K5 t; g; Z; _4 T set-current-plot "Totals"
1 }6 u) q q; i' ^/ p( J set-current-plot-pen "turtles"5 Z, Z% W6 X$ e' Q0 {$ E8 @/ Z
plot count turtles0 n {1 f% U8 g# W5 x- ~* i
set-current-plot-pen "grass"
( w2 D5 c" }+ P* C$ i e+ o plot count patches with [pcolor = green]
/ _: x, U- E% Fend/ H: o+ H8 Y# W2 Y+ u5 g4 ]. w& a
可是运行时提示no such plot: "Totals" C7 `0 e V, y+ p
error while observer running SET-CURRENT-PLOT, x5 w0 ~$ n/ a; f4 r& E
called by procedure DO-PLOTS, z' E! N) e7 w0 k
called by procedure SETUP0 t' I! h' T4 s. k" _! A% x+ ?; X
called by 按钮 'setup'
7 {! B x8 m4 z" L5 A求大神解答啊 |