我编的程序如下turtles-own [energy]+ R1 Z1 D! `* E0 l5 t
to setup5 j- O0 g4 b1 j$ P! i& U- n1 ]
clear-all+ ]7 H7 k2 l# N; O8 _" B2 \
setup-patches
* e- z# _6 w" s% u6 O% ~2 u* t create-turtles 100
2 X- e: ^6 w. ~3 ] do-plots5 q- t( Y9 x) x ]4 L
ask turtles [ setxy random-xcor random-ycor ]
2 }7 G0 k+ D* y! W' _/ I. t+ |, _end
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move-turtles
3 `) E" R, a8 D- L' O eat-grass
, C8 w; u- l6 M- t reproduce
; w7 [% N% P8 @0 V; n# w# n check-death9 @/ e$ \# n: c1 d6 |
regrow-grass3 @$ D- Z" O# H8 Q) B- n
do-plots
; }! ?/ H p, m3 P" nend2 m3 R5 z5 T' j4 g6 k
to move-turtles
) B/ T, U+ R' {- H- K$ v* ?. Y2 j1 M1 X ask turtles [! p& i9 r/ e" @; L Y
right random 360
# J0 A# l: }. I forward 1. F2 \/ n2 x3 q
set energy energy - 1+ k' e8 z! B* B" {
]
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# d+ H7 l5 L2 q8 d2 jto setup-patches V. B& P& A+ M# D8 I, w) {% g
ask patches [ set pcolor green ]- j0 ~/ }+ m E: h1 ~
end
; ] v; o3 k8 Z" A* T* dto setup-turtles; W8 l5 L* u) }: W# V2 M3 s
create-turtles 1002 F* J4 o) E3 |* n( Y& n
ask turtles [ setxy random-xcor random-ycor ]
% G. |: U) ]% [/ Y4 Yend( {8 U) b! _, Z: \. m% n$ X
to eat-grass0 S7 L4 F5 V. Z9 O) m- z; ^
ask turtles [0 p4 i8 d- A% A" V3 f% U6 K5 d
if pcolor = green [) C' {% S) J5 M
set pcolor black8 H1 \, \! x( r. _( e/ i( V3 }
set energy (energy + 10)
4 m( U; w; o- Y+ u" q6 H1 q, H4 N3 z ]
0 e3 t% H/ _, K ifelse show-energy?
+ D, j( b9 G! _" a2 n- y [ set label energy ]9 O2 G/ q6 ]$ g3 G+ l1 Y
[ set label "" ]
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9 z$ B" L% S$ x* Y Eend' e: `6 ~3 X5 z- g* K
to reproduce7 T" y8 t7 E6 L/ T% j
ask turtles [- t+ H7 E6 E4 l! q/ S
if energy > 50 [
[& M9 J5 k( f/ O6 R set energy energy - 50
5 K, t2 I5 c5 s4 O9 D hatch 1 [ set energy 50 ]
$ v: _6 d! y- A2 _6 ] ]
2 F7 V6 _% Q1 u9 k3 U" s; @ ]
4 {: }% y7 P5 t$ B& o' V, N& Yend* c( w3 w- y# O
to check-death% h1 [* ?5 V; v. k+ @2 {
ask turtles [) I% y4 E" I3 `3 T( G
if energy <= 0 [ die ]
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9 Q: Z1 r; e; E" p5 Vend7 n" U" V1 W+ \; @, Y9 H3 @: v
to regrow-grass
. |% ^% a3 D' U+ V/ [/ h) \* D2 S0 F/ K; w ask patches [$ ?: m: I5 c/ Q) B
if random 100 < 3 [ set pcolor green ]
# Y! I- Y9 }5 N* O ]
, H3 ~/ i9 v9 l1 eend& t, j2 l1 ` o8 H: I. P2 a
to do-plots
$ p) B' q; Y3 \- j) H( D0 w set-current-plot "Totals"
$ M( N7 Z7 f2 m) {# F# Z6 m set-current-plot-pen "turtles"
) c: g3 V/ y, a3 j# h$ @ plot count turtles
; j0 x3 |& x7 [. z set-current-plot-pen "grass"
" p8 D* c; l5 ?( P3 D8 r6 W5 f. B4 s plot count patches with [pcolor = green]
, x T: C, Y# Q' Uend9 |2 L, W8 D- ~/ [9 u/ Y
可是运行时提示no such plot: "Totals"( g S0 c0 W7 n4 }
error while observer running SET-CURRENT-PLOT- O( X3 o3 B$ {$ n! y
called by procedure DO-PLOTS" \5 m2 x/ t- R5 w8 Y0 q/ _
called by procedure SETUP
; S( J7 w5 Z, P& V5 v9 G V called by 按钮 'setup'
/ l) ^+ \, p' g8 ]3 M; K求大神解答啊 |