我编的程序如下turtles-own [energy]3 f, N. v: e5 {- K9 Y7 F
to setup
/ ?+ K9 c6 ~. [& a5 X! H clear-all! p5 o3 }2 l. g3 {
setup-patches, L0 G) t! u# e5 V0 y' D
create-turtles 1005 A( f: r; S- @! r2 k& Q3 [
do-plots4 x7 X) q( q+ U% Y$ k: }
ask turtles [ setxy random-xcor random-ycor ], D, H0 t% T0 u) u
end
6 Q T! k( o s7 W) y6 q" H$ X Dto go
& y) S& @/ F: }4 l move-turtles+ s, | P/ e# I4 h
eat-grass; z/ n6 n2 g9 i1 j
reproduce
- M' W9 A9 E0 h+ v5 t; { check-death+ `* v- H7 h+ l
regrow-grass
! D$ g' Y7 F O d$ {1 e0 | do-plots
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to move-turtles
, L4 p9 y# x0 s9 t" F$ n! `* W; O# G: | ask turtles [
3 k5 | P ^0 L& |/ D2 e right random 360/ s: l' Z8 I! F3 C
forward 1
M& r5 C/ b# W* [9 K2 w+ \) ?$ ~ set energy energy - 1
: j+ W! q7 N4 [; h$ r" r: l ]
$ }: o$ s2 o1 xend3 \- ~4 Q+ ~. P: h) X, R
to setup-patches% S# X! V+ f9 ]# I7 o# C' p
ask patches [ set pcolor green ]! @1 e0 b; B, N7 L& Z4 `$ N
end- o% E2 [% o* O) K$ y
to setup-turtles9 E7 Z& [8 n0 {* s# Y5 h; B8 c( f* m0 O
create-turtles 1002 ?4 o6 Y Y2 F y w5 H
ask turtles [ setxy random-xcor random-ycor ]
! C8 |+ `) G5 f Oend# L9 D& {& T0 c* W j s* e
to eat-grass$ y( Y8 ~- x0 D; j+ R
ask turtles [
: _8 N- [- D# r+ ? if pcolor = green [
! a$ y! {7 [" }/ M2 j' f" K7 o set pcolor black# j/ j: b# `, }: \0 I0 p0 F
set energy (energy + 10)
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ifelse show-energy?
4 }9 R7 _5 i. r; z [ set label energy ]* i% Q1 ^$ Z, C
[ set label "" ]
" Q8 m+ [% ~! B) y ]
5 {; s* C/ {" L' oend$ V" b; Z, [ H6 n( P0 L" \
to reproduce" i* {) |4 Y# N( a( x
ask turtles [
. ], y' W" U7 F if energy > 50 [
9 ?, @7 ?3 j1 t- T- W4 Z6 | set energy energy - 50
3 Q! _+ a$ P- ^% ]+ @5 A hatch 1 [ set energy 50 ]9 _/ x9 t# L+ C* `4 ]+ p) U
]
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end
: Z5 J* a5 z# U+ r, [to check-death6 C' o. n/ V- b) G2 ~
ask turtles [
, J! R) V" x, U1 T5 ?3 z if energy <= 0 [ die ]
5 O/ Q' u% E) O& D ]$ W* N4 g! W8 E/ a
end l" f5 l' u! I: S5 e
to regrow-grass
* T# [+ t: }" i$ O( ?3 | ask patches [5 y* Y' \: ~& Y) a3 W0 ]
if random 100 < 3 [ set pcolor green ]
9 g/ r$ v8 x1 a2 X& h5 p- _: o ]
* q; t. a7 g4 @2 Xend; C" W" e$ {) n8 U9 }% S% L
to do-plots
$ Y6 `; F. Q. b set-current-plot "Totals"
* ?( S3 y; g0 H9 P9 [& G+ _( A set-current-plot-pen "turtles"
4 J% o5 w0 m- q& {/ U: m( H5 _ plot count turtles* c! h" B3 |: q! [1 _5 }, Q
set-current-plot-pen "grass"
- z+ f. r9 N, z# ?/ o plot count patches with [pcolor = green]) n3 X; g8 P: G
end
# U4 B" v: s" G6 y3 ] {4 n# B/ G可是运行时提示no such plot: "Totals"
* D0 H2 X2 G0 z; c* jerror while observer running SET-CURRENT-PLOT
. h# x C3 k: l7 p8 b: d called by procedure DO-PLOTS7 h* F, p4 Z$ w$ Q1 {
called by procedure SETUP, ^' ^" T% C8 ?1 P$ s
called by 按钮 'setup'
! Q/ u, j$ S% I L8 \求大神解答啊 |