我编的程序如下turtles-own [energy]" u$ Q; d* r% j8 b$ M
to setup* q; H5 P8 s( `' N6 P" p
clear-all. J& Q. m8 s: L
setup-patches
6 w1 W$ L# |, [! o create-turtles 100/ z( a1 {$ }& `0 z5 M C) U
do-plots8 E1 h: p$ J' w% Y0 B8 i: H% E: m/ {) g
ask turtles [ setxy random-xcor random-ycor ] @& X/ U% ], e( X( l
end
% y/ U" F6 h* m$ Bto go1 f: Z* `+ s* @1 F4 k9 K1 D7 k
move-turtles
8 P/ B9 ]% [9 b eat-grass( }8 }* I+ @8 N0 V3 _& m
reproduce
" g- M+ v a2 x# h" F4 q- U$ i check-death
) S( d& M0 b! h regrow-grass" i, F# ^% l) W, S: L2 O
do-plots
. y- L2 u$ c' i9 N8 y9 Kend
. M* @ L3 j8 D. V: ?# D$ n) U+ t8 pto move-turtles
. g U6 P9 k8 V4 ?& t ask turtles [2 j8 N% d0 R' g2 ?- J
right random 360
k# Z8 w2 t- L: M/ @9 I forward 1
4 U- q& L- Y+ T2 { set energy energy - 1
I* ?0 y+ h/ ^6 B% \ ]
: e3 h* X; ^; N4 I5 cend
& U8 i! b( g1 \) |to setup-patches6 ~/ e; |. ?+ U+ U" I$ Y
ask patches [ set pcolor green ]- [" m" A) p5 s/ c6 m( g
end6 h( x6 C8 I8 m) `8 h
to setup-turtles
# Q, q' i) A2 X8 f( A0 q; S% S create-turtles 1008 G7 ^$ p) F9 j/ s$ v
ask turtles [ setxy random-xcor random-ycor ]
+ g! I5 u S6 M* kend/ K J. b+ i# c% I' K; u( m2 i1 _
to eat-grass
3 w- ~% O4 w3 F# N' X ask turtles [# }; k4 ~' j: h, k+ R W
if pcolor = green [
/ k5 J1 G2 l! c, z1 {1 @, p) c set pcolor black
; m9 r9 F6 D6 U- l2 A, C R set energy (energy + 10)' r; ]# U A1 E! r8 j& w
]3 m( ]) v4 m6 G9 {# E4 R+ L7 X6 ~; t
ifelse show-energy?% C; ~: {, p. o3 N# y
[ set label energy ]/ K& [* B6 k# B4 o* [* y) Q% H( m$ ~
[ set label "" ]. G! Z4 p" H U* a- Y3 O
]
5 v; j1 W0 O4 xend: n, D7 X& }* p. U+ k
to reproduce
, M4 ~9 t9 M) H$ p0 O( q ask turtles [7 L2 Y2 }: c9 {
if energy > 50 [# v1 ~+ g* A! a4 {1 \
set energy energy - 50. B" K1 K( W& Y( J
hatch 1 [ set energy 50 ]
$ e [) Y) j& P7 M7 T5 W ]
% {$ l+ ^$ ]8 J9 q% d ]
! q+ F$ V& w. n/ h$ Z0 L0 ^end1 Q5 j8 L P F% a: \4 e5 R, p+ N
to check-death
9 b8 @# N0 ^- M) J+ k ask turtles [
0 n1 L. H l8 ~+ ?. B, _ if energy <= 0 [ die ]
3 ~' Z+ i, z9 {/ V9 w( f/ q ]
* w% T. y2 U4 r, tend! X6 \3 c1 j) W+ M8 n
to regrow-grass- C# d6 `! D+ h4 o0 i( e- M W3 v, a
ask patches [
* s) R8 O; D1 z* j* D+ Z if random 100 < 3 [ set pcolor green ]" T' X; i# \2 i. a
]- A, P0 O2 _% A9 w0 m. k
end, \1 B% E; g) s& I: p
to do-plots+ s. B1 r Z$ F* O( s3 ?: ^: _. ^# f
set-current-plot "Totals"
% _$ I! Y2 u! {5 b# S+ P2 D# \ set-current-plot-pen "turtles"
& e3 f$ B# {2 K plot count turtles
& ~) ?" a M o+ e) J set-current-plot-pen "grass", O, e* B/ _/ q2 s
plot count patches with [pcolor = green]
. @' F, W. G/ y' ^0 B2 qend
7 L2 D$ t! S3 L. K; _可是运行时提示no such plot: "Totals"
0 ]1 p8 _0 Y' x0 Z- ~error while observer running SET-CURRENT-PLOT* |/ j+ x3 W1 Z
called by procedure DO-PLOTS( I& R# Y' Q5 D8 h1 K* t+ R! `& k- d
called by procedure SETUP
( o0 Y. h+ m$ P; R3 v called by 按钮 'setup'% k3 K7 l& G& x: l' A& \
求大神解答啊 |