我编的程序如下turtles-own [energy]
$ m) D2 X/ w: ]8 K6 _! P$ Gto setup# w0 U; _$ a! d Z
clear-all
8 v L' T, P" X setup-patches/ c, y! O5 d7 T* I
create-turtles 100+ ~, S+ d* P, T8 q+ H. y) w
do-plots* H' i ~$ A: v* {: ^1 r7 H& l
ask turtles [ setxy random-xcor random-ycor ]
& P4 q# ~, y0 Y Z" c! A4 P# P& X. Tend
3 f5 m4 J& W- [6 \# O( nto go
$ {1 t- o1 C6 B+ K9 N move-turtles- C3 y' O1 j, B9 g" x0 a
eat-grass
7 n. }* g: A! d$ A8 i reproduce
! h9 i, Y/ U7 v$ u' }" K check-death
- s1 u2 v; F( n# J; | regrow-grass
7 q3 U: F2 g) m }) | do-plots
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to move-turtles2 z5 h; x. g( r" Z9 ~) g# X' w" e
ask turtles [. C( t$ X( J! v+ H
right random 360
# a8 F9 E; R$ R$ u1 T$ Q. ] forward 1
5 f: D" y3 b! M! _ set energy energy - 1/ w, r( g, m5 M4 u% `1 w" B
]* j! V& [% g9 ]$ |( v
end
% M3 L7 M' m0 c, k* Oto setup-patches
3 P, D! ^ D" D4 C ask patches [ set pcolor green ]1 d& s; i0 }4 r6 A7 z9 x n5 ?
end
) A; t( [; y H1 B) o8 Fto setup-turtles3 }& [. [1 \& |% g7 B' Y7 ?
create-turtles 100- \4 F( G6 r2 C. D. F, [
ask turtles [ setxy random-xcor random-ycor ]' w) f3 C9 \2 |+ Q( `
end0 ?0 S( T9 u( I2 t
to eat-grass+ R# F5 T( H* ]! z
ask turtles [9 q' c% p7 C$ ~* U0 O: @
if pcolor = green [' E7 u' l$ x) i- G9 ~2 P' T
set pcolor black
1 U4 A$ \5 j8 A) v% Z' T% w* F+ c set energy (energy + 10)
* K' h6 G2 f! |. A ]
+ C4 o% X, {4 O( d! p$ W2 S5 I* L) f ifelse show-energy?
+ T+ z( Q2 D: x9 @# |! ?* ~ [ set label energy ], D# ~1 U" @' D# b. a" Q- w/ Q
[ set label "" ]& w7 a4 D2 j7 Q) C* Y4 _
]: h* N9 v7 G% m, @. L3 O1 b
end
# M4 l/ f) W6 l) |, k+ `to reproduce. p1 B1 V& Q1 S9 @# A& U, k
ask turtles [6 Z2 \+ T8 V; @; P" z3 h: W
if energy > 50 [ i8 K$ R9 w! B
set energy energy - 50
, m" K- s V0 C8 b. m7 O3 v hatch 1 [ set energy 50 ]
5 `, u0 n# U0 p ]! N# |& F. P; c- B! j! ~" Z5 ]9 E
]
" G9 ?( x* S( h" k; o aend
5 n. E+ D6 x" h) ?* tto check-death8 P- E4 j2 k8 |/ t+ k% M
ask turtles [
, y* u+ L8 I4 a m$ \% X5 M if energy <= 0 [ die ]
) u( g+ B' Q8 T& Q7 [; A ]
# C! d! P5 `5 t$ q. @7 C: yend1 z( y8 u! V/ m( O C7 t
to regrow-grass8 R9 C; d' O* w0 }) F3 }: B" H$ u
ask patches [, Y. C& p5 U7 t! B$ B
if random 100 < 3 [ set pcolor green ]
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end. Y% A& P3 ?$ z, Y
to do-plots
1 N Z* j/ n& _, L9 L set-current-plot "Totals"
6 O) u' h0 Y/ I) k: h set-current-plot-pen "turtles"* d6 t" E: O( Q% n! |& k
plot count turtles) q' L. ]6 U; Q a F- U
set-current-plot-pen "grass"
, [$ B( H/ C% K3 X9 D8 v plot count patches with [pcolor = green]
' R5 t$ V, I7 Q/ U" `. i, \, tend
% B' N4 P& ^* R0 O. N9 _; V \可是运行时提示no such plot: "Totals"
6 B) x$ l! \, K: \0 ^8 Kerror while observer running SET-CURRENT-PLOT
2 y. b0 o( U7 i# k9 y called by procedure DO-PLOTS- [5 M* \1 G/ p) n5 ~: U9 q
called by procedure SETUP# q" }& u5 n* x+ V# `6 P- _5 @ Y* d7 n
called by 按钮 'setup', u! p( Z) U) r) N; S7 G4 Y6 f
求大神解答啊 |