我编的程序如下turtles-own [energy]: d6 l: o/ J" Y! c4 j
to setup8 |: L4 \- E7 _- H j) a& k
clear-all
2 j) R$ z4 q8 |: m& T5 ?6 r4 Z setup-patches
R( f% N1 Q/ U$ \2 q create-turtles 100
: I o- U' |2 q O* V do-plots4 h* C& R& U4 W1 M& `7 p
ask turtles [ setxy random-xcor random-ycor ]
! O. I: c; c" n0 q, |# ]end
. f3 X2 S: N; d% _$ [to go
- [# a' e, M1 [) Q move-turtles4 {- l( D6 [3 Q& L' \0 T! e
eat-grass4 @! N% K7 g7 { A; { Z* f
reproduce$ z& e7 M/ P' r& i
check-death. r2 b' k+ F2 U8 p- b1 h
regrow-grass& ~$ g1 M8 p' |
do-plots) D/ Y; X' X. H- t) s
end- t8 u; B+ w& {+ ?
to move-turtles' c/ F( w: t9 m8 T
ask turtles [2 A2 P& D3 f+ i$ `1 f
right random 360
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5 | X* ~# @- \+ v8 {0 G. r5 ] set energy energy - 12 t8 R1 A! j7 u. Z
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end7 J- h3 @& X; V8 |0 x6 L
to setup-patches3 H! ~3 ]( M9 H& K$ ?- x
ask patches [ set pcolor green ]
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to setup-turtles
& H/ r, {2 Y& t create-turtles 100- c k( L" A1 ]% E7 @
ask turtles [ setxy random-xcor random-ycor ]5 `9 _& F3 @5 A: Q
end0 ~* f, J: m0 g; S. Q6 @) E, y
to eat-grass
7 ^ t9 _# h6 o, ^ ask turtles [ W- H7 l B# W6 k% B. Z
if pcolor = green [
& U' R& I$ Z- f( } set pcolor black& ?' V. C3 o+ i. V
set energy (energy + 10)
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ifelse show-energy?
/ x% x& L4 n6 P5 K+ t4 Y/ `0 H [ set label energy ]0 L) ~# C: w% {; H* U" y
[ set label "" ]& c9 ]1 {" A3 `0 n
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end
- `! e" L5 f1 X! K( Z9 w9 rto reproduce# F/ R+ y9 n& e& j ~! z% k# |# k0 e
ask turtles [
1 }% o O, H4 D; u% l: r) q e9 l if energy > 50 [
$ _% G/ S; e' \$ t set energy energy - 507 z- V- k* F2 O0 W
hatch 1 [ set energy 50 ]$ `- ^' y0 f* u5 i" y, W
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]
1 G/ p* t- A3 b }/ f0 H2 v8 ^( eend
4 W# y" \' Z' P3 _9 y1 C- fto check-death+ s- K. b& W, a: y4 ^' ~* e7 U
ask turtles [
7 @6 {- H/ F3 c2 D if energy <= 0 [ die ]0 y: ~" R( b- B) s/ x. N
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end1 f% B9 U. v0 `6 T' P
to regrow-grass" q# P. u1 S! e$ k+ D
ask patches [! s7 B; V3 r0 w. C
if random 100 < 3 [ set pcolor green ]
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end
F+ c$ G v/ v5 [" Y! qto do-plots$ G* a' h3 P. a2 g! f9 `6 h& u
set-current-plot "Totals"- q/ d1 Q: D' k5 n0 s5 O" \6 b
set-current-plot-pen "turtles"
5 y$ m O: `+ J! g! e# I$ | d plot count turtles5 R: r# {' s4 e$ Y$ s/ e
set-current-plot-pen "grass"
. K7 ^: b% y& X plot count patches with [pcolor = green]
( s A. f2 I/ V- M/ b# ^1 i# uend
( j B( q2 z, k7 Y可是运行时提示no such plot: "Totals"9 d x6 E* K9 G1 X1 [, |+ S
error while observer running SET-CURRENT-PLOT
3 |. b0 @( W/ V/ T1 | called by procedure DO-PLOTS
, x8 u5 v; u3 } p1 m called by procedure SETUP
( ]& p/ K0 ]& f+ P6 ^0 x called by 按钮 'setup'
. j. H( h; w$ ~) a- M( s求大神解答啊 |