我编的程序如下turtles-own [energy]: ]3 I) W8 T3 q; @0 I( h! u
to setup
3 Z5 t5 {9 J: w clear-all
- x% n/ D' H" c7 n setup-patches
5 p2 `- c) |: P0 w1 D- W create-turtles 100# Q, y6 T9 ~4 w
do-plots1 D' ? ^0 {1 I. B) \
ask turtles [ setxy random-xcor random-ycor ]
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to go. w" S( i. t/ W. @5 J, K/ N
move-turtles- y$ I) ~$ Y# P2 v2 A
eat-grass
1 m+ x# ^# H* f$ p reproduce' B# @" M) d9 c' ~( A$ n/ ~
check-death
! y7 n0 k/ a# J" G regrow-grass% W0 ?) h: [% C! `" t
do-plots
1 X4 Q6 x9 o, t! ~" Zend
0 t& k- d \" R2 Hto move-turtles3 ~6 d( `3 e6 Y/ x5 y
ask turtles [
* U! W) N. a$ D: t( K% u0 h right random 360- F, b7 |, J# @1 J/ P3 s. J' ~4 I
forward 1+ G; d' M& V' q4 m; o M8 @5 s# d
set energy energy - 1" ]: | I& A3 L u
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end
5 C3 p, a5 w, {2 L3 P: v. X- J. i/ bto setup-patches
1 S1 h: n! y3 @' b) }. b ask patches [ set pcolor green ]
6 d1 a) I1 r1 L# A2 qend
& b, }! {2 x+ |) L* ?3 ato setup-turtles& Z1 @3 |9 I; V
create-turtles 1002 W/ z! i$ |$ I8 }: ~& _8 `
ask turtles [ setxy random-xcor random-ycor ]
, b2 s/ R) C# q7 [* R" Jend
) K- n1 w: g4 o" Rto eat-grass
9 \% l9 E5 e& U* g3 I4 k ask turtles [2 i( Y) F/ P7 c( v
if pcolor = green [. a. P# S( @. s9 K/ G0 _0 k0 y
set pcolor black
( j! D5 v* V, H" n, f set energy (energy + 10)4 C: f. n2 r4 ?: {0 R! ]
]
# h6 C9 y- p4 q% M4 H/ e& J: ] ifelse show-energy?
- c! a8 B/ K8 O, V6 Q$ f [ set label energy ]
, |, o# `( O, t- \; M [ set label "" ]
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end U+ X7 l3 a3 R9 i) P
to reproduce
2 G+ B, s! \" \8 t# ?" _6 B# m ask turtles [! q$ W3 l& l5 p) y
if energy > 50 [/ G# k8 j6 O" k, N
set energy energy - 50
[# E* C+ F' |$ A& t1 @: }6 G hatch 1 [ set energy 50 ]& e& |8 [9 \. R1 [* Z. n
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]+ b. B- l( L. R. g# x5 R- u
end2 K' t' x( `+ Y v1 w
to check-death
3 v4 C* ~! i- S6 F/ x- k ask turtles [" l- {9 K' G( j1 ? U
if energy <= 0 [ die ]; w6 z5 ~: ^1 X4 h+ C- l+ T
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end: K5 E8 {0 ~9 _. i9 W
to regrow-grass/ U& q0 }9 |2 @5 H1 M0 K
ask patches [. [0 V7 ]6 i3 s( B8 T: A
if random 100 < 3 [ set pcolor green ]# A+ I7 v- r" m9 ~& p8 _+ W3 c
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end' P( q# V+ Q% d% U n$ y
to do-plots2 M. ^8 A% x$ l& T, n4 J6 H
set-current-plot "Totals") h+ z$ H% p D. A/ i
set-current-plot-pen "turtles"
" B( c% b. n# A {9 ]' d( [ plot count turtles4 i2 E8 k0 c: i: T6 O( \" C
set-current-plot-pen "grass"/ `1 r3 p/ ^8 [/ N2 C
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"/ V4 Y0 z% O, |. Q. P
error while observer running SET-CURRENT-PLOT
- q A3 b T7 M/ ]! r. l called by procedure DO-PLOTS9 V+ E& H' @+ M5 @ u
called by procedure SETUP' U( E4 ?9 `$ k. o* y9 d9 A
called by 按钮 'setup'
9 k6 k8 y: c3 p求大神解答啊 |