我编的程序如下turtles-own [energy]
! I2 V) G' X$ N$ W9 j8 Q. Tto setup
- C' m" q4 d- \% G clear-all
( y/ g) w; F5 G p' X E setup-patches
3 m5 X9 G, t$ M create-turtles 100+ i& o3 W! ]# O) M
do-plots
5 v9 x4 S; x2 V: b6 D" R& Z ask turtles [ setxy random-xcor random-ycor ]
- u2 n& T7 f) o1 X; Z) j1 q4 vend8 v+ L: n% ~3 b
to go/ s% W% R5 r) g( }1 F
move-turtles: ]) i5 ~! E/ [) T- I0 C
eat-grass/ X0 `) v& U6 O1 F$ E, @
reproduce
9 p8 ^2 d2 N8 [3 E i check-death3 d3 j3 y2 g% v) g' e
regrow-grass
% F; N3 n; z8 x6 Q$ t$ o0 q do-plots
& O8 i% e& G& _1 h9 ?end4 x8 @% S5 T, s! K
to move-turtles
- z. s! K; x7 h! N ask turtles [. j3 i6 |9 z' K( C6 j* `
right random 360
; V: s9 \ e, m% M/ d6 \; Z5 { forward 1! v% c3 M2 K% H; e* j4 U/ P
set energy energy - 1, _/ t8 C3 D1 g7 H% ?4 f
]
0 M6 D1 W5 f% [end
4 u% h( q2 {' mto setup-patches
, A) T, a5 e5 K! w! T ask patches [ set pcolor green ]
( q! A9 R2 q* n+ ~+ Pend r% u' z5 s: W# M5 ]+ ~
to setup-turtles& W2 R* J$ I+ `
create-turtles 1007 ]6 Q! K) j# i1 D
ask turtles [ setxy random-xcor random-ycor ]4 l, `) f4 U% j/ o; k
end
. c0 \; g y% r1 ito eat-grass
$ U. T$ o& _9 E" ? F ask turtles [* I" A7 d: d; f4 A$ N- i5 G+ _3 v
if pcolor = green [2 ^% z4 ^" l2 O/ r8 w& Z% e
set pcolor black5 P$ P. z9 v* w9 y
set energy (energy + 10)
1 M! F; G# D) T# s2 [7 E+ _$ i ]4 J# ` o( {4 {1 ~$ ?
ifelse show-energy?
) p6 J+ T6 z3 k; w [ set label energy ]
, d( p. u+ m) U( k8 Q [ set label "" ]
# n* I6 o, u) E) h# T s/ n ]
% }% {$ @: z/ j/ jend
1 p4 f+ E' R, Z# sto reproduce
, Q' V; W$ z; |% m2 @8 P; x, [5 l+ J5 I ask turtles [
# N9 P0 T$ A" c( |- B if energy > 50 [5 {% V. s' @# v0 ]3 M* w% G
set energy energy - 508 j* T; h7 _- t, m" n2 c
hatch 1 [ set energy 50 ]
% Y" n8 ^ K- B$ z ]
8 r- [! T, D; l5 [, y ]
. q+ l2 N* b7 s2 z9 c1 f2 Z' ?& Q3 tend
$ V a) I1 h7 ]. bto check-death7 Z" j! n$ g7 M" x
ask turtles [, R4 \3 b p ]- d( ?( Q, I+ V
if energy <= 0 [ die ]
' F3 y6 S6 a+ S4 | ]
0 ^/ V- P6 c* K/ X3 x, \7 o$ Rend
! |: T! V) N0 z' [to regrow-grass" i# F9 g$ O) G G. T2 D: `6 j, _
ask patches [
( Z3 b; q) u2 t* \# a( v, T& D( G, [ if random 100 < 3 [ set pcolor green ]
1 B( B' {4 B' s s) ` ]
! G8 U7 u w' v$ a* Q! o; Qend7 k1 V3 F5 a; d+ [
to do-plots6 q! G' X: E& v- ~. K: c u
set-current-plot "Totals"
3 h& `/ o% a, ?" @3 b set-current-plot-pen "turtles"& s# x7 b( U* {3 @ t
plot count turtles
; y0 n( g; }+ y) j' c set-current-plot-pen "grass"
7 `$ v! F j- \* u& p plot count patches with [pcolor = green]+ T6 c$ ] ]1 i5 W9 J& h
end
$ ~% V4 b- E3 I, v可是运行时提示no such plot: "Totals"
( y" S5 G1 x: Z8 `* X/ Rerror while observer running SET-CURRENT-PLOT
. ~1 k% I, j7 b* [( ]- ?# ~ called by procedure DO-PLOTS
4 }% g. g5 M+ @$ Q p4 C called by procedure SETUP# J H* U" t6 ?
called by 按钮 'setup'
6 \4 D# ^ g5 Z7 K) Z2 ^求大神解答啊 |