我编的程序如下turtles-own [energy]* L( H$ r- \/ M/ x9 f
to setup4 r+ J5 {* g7 c
clear-all+ n8 a c1 x9 y! X9 S
setup-patches
7 S- M4 x: t7 V create-turtles 100
+ g' F$ C0 {9 c4 L4 l& l5 [/ ` do-plots
, a9 y3 l4 G9 j: ? ask turtles [ setxy random-xcor random-ycor ]9 }5 T4 F4 v* P: x9 Z, o+ n2 `
end
! H9 k9 d4 j7 l# Mto go/ V: h0 \# j, g8 m/ B8 _2 t5 q
move-turtles; _7 Q' x i, v( D
eat-grass
7 H: C1 R+ M" V+ z" E reproduce
3 _9 a5 z7 g' o. Y( i$ f, p$ C7 t check-death
$ T2 j+ v5 K' j0 I0 u; j4 W9 v regrow-grass) H) f* O9 j h! ~7 b8 F
do-plots- z+ z7 ~) a4 t
end# }/ a6 f) W- L" `! N
to move-turtles
( K2 z, @* G4 [% ` ask turtles [$ k0 p# k$ R& U
right random 360
, x2 N' K+ ?# [$ \& y l4 @( s forward 1
( D p W) \0 @/ p p) f+ g set energy energy - 13 O8 `2 C: b% ~9 \
]
: j/ g5 P' ~8 h+ c- k. y2 gend
& \$ f o* ^3 ]3 Vto setup-patches3 L8 g0 \ u) Q4 q$ H/ I% s0 g
ask patches [ set pcolor green ]
6 E- T0 e2 m f9 Z% v+ mend) S$ \( _6 W: o/ G) y
to setup-turtles9 Z9 F# ~1 _$ N7 H. s
create-turtles 100
' b9 ]! f; H; U" {. O A0 O/ m ask turtles [ setxy random-xcor random-ycor ]
) S. g3 [% l9 U+ ~4 Jend
' ~! _4 q2 P: X# k* T$ S9 Sto eat-grass6 F6 p5 d9 ?1 D* V5 L6 Y
ask turtles [" T# o1 T* o' i8 t) I
if pcolor = green [
' l' q; ]: h& n0 n set pcolor black
1 N% c7 Y3 y7 z set energy (energy + 10), S. y. B5 x' }, b/ n2 S
]9 |' Q' w/ {4 Z, H( g8 t0 a
ifelse show-energy?
/ e( |5 q( ~9 A% S+ I' s* F [ set label energy ]" y- X A& O" N$ b$ I
[ set label "" ]2 F( _# Q* b; D( h) [4 h
]
: Q; f5 k6 Q0 Y* w. n- ^' Yend
- B% g* O3 K3 dto reproduce8 S" A3 V# h6 H( ]! ?
ask turtles [
7 p9 L# P6 i( |$ b if energy > 50 [
" U" i; G$ n3 o set energy energy - 50
0 D1 i5 Z+ h3 m \ hatch 1 [ set energy 50 ]
( A' S' ^4 C$ e3 D7 Y/ Q: R6 v7 k ]4 F5 V" r( G9 a9 \" s2 J
]5 U$ N% F2 z, ^! Z! G" a
end
1 G1 Z' x# K! M. H- Wto check-death" W5 q& l9 U4 v. f; |- e
ask turtles [
2 Y( _9 k. y/ G4 ~3 } if energy <= 0 [ die ]; ?; _4 x$ I* u( G+ p# [' F
]1 r! N6 j! {3 `# L! G) y
end h( F; V" S9 r$ E1 Z
to regrow-grass
7 ^2 T) w$ ~0 R1 E! }4 `/ z ask patches [
( R5 ^% [! I1 l if random 100 < 3 [ set pcolor green ]
[. _6 l" H6 y( E3 l( Y ]: C8 A/ |3 p" y0 ?' A; v! X
end
2 l3 Z. I& B% Gto do-plots7 P) @9 k5 D5 Y
set-current-plot "Totals"4 g, I5 L5 D, q# T7 C( b. `( [
set-current-plot-pen "turtles"
5 Y% L8 a( N% b' f plot count turtles$ o; v* J4 M, O
set-current-plot-pen "grass"5 A: o- U0 o( o
plot count patches with [pcolor = green]- F$ h1 {8 \" _6 [% _1 \
end: j1 A D6 v2 u: J5 }1 ?
可是运行时提示no such plot: "Totals"
& U) _: c" J9 z% Merror while observer running SET-CURRENT-PLOT% l( i* u# M, \: Y9 C6 Q
called by procedure DO-PLOTS8 t$ t" b) M: P3 U9 F1 k# X- C
called by procedure SETUP
" X) J# A: @, [ m called by 按钮 'setup'
0 \' K5 {4 x1 [: T5 ]; k求大神解答啊 |