我编的程序如下turtles-own [energy]4 T, N# M( `1 o1 c: q$ ~
to setup( B, b Z+ l* t' V7 z
clear-all; ~# X) }6 C! Q7 Q, s' ]
setup-patches
# h1 Z% q( T) C( w- `+ T create-turtles 100
; E5 W8 g# R) Z do-plots
$ y% \8 w% W: |6 t( b7 ] ask turtles [ setxy random-xcor random-ycor ]
3 K# K3 a+ B6 yend
2 I, m/ B8 E3 t5 I. @to go
1 d! H1 Q3 [3 j( J& C move-turtles
3 X( ]9 y4 u+ _/ v; ~0 x eat-grass
0 p! v g2 N% K, C5 h% D7 ] reproduce# a+ l1 A: F9 R" I) P
check-death/ y1 T w6 k2 r& w: G: q$ F/ W
regrow-grass
8 ?9 Z/ w& R9 j* w& Q; G' s do-plots
' w+ |) s) A; @' \5 uend
" \; s" m: ^6 z/ _to move-turtles6 G$ j) c( R2 H+ A3 @ T
ask turtles [
/ _( b& ~; i( E0 L+ X right random 360 W6 M0 g( U' G, Z' h
forward 1
9 K8 n) V8 |7 W; l! w+ I3 O set energy energy - 1
1 k3 o" h5 _8 T( M5 i9 d ]
9 p" k- p; U+ r8 x9 Aend& s0 P; A" P8 Q$ ]
to setup-patches$ {0 L; e! ?4 ]1 k7 i, X8 e
ask patches [ set pcolor green ]- a u$ W$ N$ U9 H& b6 a. `
end
8 A+ b5 I& p* g" eto setup-turtles
# S z# }7 b1 u; ]9 D5 G& E/ m create-turtles 1004 |0 Q, m; K' Y* Q& J0 L& u
ask turtles [ setxy random-xcor random-ycor ]
, u+ v0 Z2 Q; bend! V. E6 x8 C( E9 A5 X
to eat-grass ]& D5 K8 K: u, G2 ] X; ^
ask turtles [, L/ B) F2 `% X5 p7 E1 W
if pcolor = green [5 v2 `- z2 e1 o, Y
set pcolor black
" ~+ J4 e' f, N# N) F, z) t [' U set energy (energy + 10)
4 }4 d8 Y& x3 x) Q. y [ ]( q4 W* L1 n2 U, J ]! s9 h
ifelse show-energy?
, p3 H8 N* D: a& N1 P/ c [ set label energy ]
. i8 f- n; N, T" ~) ^3 z9 u# V) R; F# { [ set label "" ]8 R( F& u A; u& p
]* Y3 d1 b' y- X4 g# v
end
8 U K4 r9 Y2 lto reproduce
& y3 f0 z5 v5 l c9 K ask turtles [5 R, S8 D- `2 ?1 {& R/ y: [7 w
if energy > 50 [) U5 [- ]! `/ k7 f9 q0 ~( `+ w
set energy energy - 50
4 T: {7 H. x3 f9 Q# I, } hatch 1 [ set energy 50 ]
6 P4 a5 g# S: r3 A ]4 M1 X- ~) G1 Y& Z5 A* T' E
]
4 w7 H" ?& v3 H% [, x1 d7 Dend8 q8 W2 {/ ]1 ^0 I$ _8 G: t u( `
to check-death; u6 n& l w* }7 l: G
ask turtles [ V+ v* {1 O. G/ G
if energy <= 0 [ die ]
5 @7 A; g5 _0 Z; \" n ]
% r0 N% c+ R5 e+ | W' eend3 ?: M1 S' h7 t& p" e i
to regrow-grass! z# O8 c4 O3 I, N- d" c
ask patches [
) F2 [! E- F3 V1 Z; A4 I if random 100 < 3 [ set pcolor green ]2 w# f) ?: g# N, n0 w
]) {6 y( V$ j8 Y# G6 g+ }5 p1 F
end& }/ r# G! r. A: x
to do-plots
: f) J* w% c) n/ z5 j8 a' v set-current-plot "Totals"
( d& y6 {: G- M, d7 B set-current-plot-pen "turtles"
0 Z# ~: [3 c3 k6 A% l; Y plot count turtles: f0 \# U" k+ v y$ D
set-current-plot-pen "grass"
0 j8 c- O' c9 x& {& M4 ]6 R7 I) r plot count patches with [pcolor = green]2 `% b- _, p* P$ S& }7 P
end
8 p2 n3 M% B' m可是运行时提示no such plot: "Totals"9 Y- c# f; A M, X
error while observer running SET-CURRENT-PLOT
, W' k0 O+ e, q' M8 i called by procedure DO-PLOTS4 k# x- X8 k6 J z: n8 K
called by procedure SETUP
& E8 x$ Z; [% J3 @ called by 按钮 'setup'4 ?5 U+ Q+ v6 h7 m* F5 O3 |
求大神解答啊 |