我编的程序如下turtles-own [energy]7 ~% i! G/ S2 o9 A! z
to setup$ Z9 Z0 h6 G$ l
clear-all, Q( k. Z' v: J& b; y0 Q
setup-patches" T+ C W' U( B0 M% l
create-turtles 100
, R0 s) I; o) `; g/ E" J* { do-plots
# r& x! a" D+ ~" J ask turtles [ setxy random-xcor random-ycor ]
8 R$ B( L0 b$ f* Y$ R) Qend$ F1 L% `# j9 F: ^' p1 f/ i
to go% m' Y+ ~5 O" q; l6 ^/ [7 \- K
move-turtles( r0 }6 @7 I/ P5 g9 j3 G7 ]+ }
eat-grass+ p4 ^+ }( N' J- s0 J
reproduce# o5 V. {( Y h7 E
check-death- N4 p5 l) F% N" b
regrow-grass
% Z1 ]% [$ N F5 I9 Y; n5 k! n0 M1 [" m do-plots3 |& d. s- V$ a5 S) k, o
end/ h4 b+ ~0 w! |
to move-turtles2 b! z1 L6 q+ Z( R0 r
ask turtles [0 k$ G: f3 l9 Z! k. L* e# G8 y
right random 360" `1 l) K9 ]/ R3 z
forward 1
% X" \! H a2 }' Z# S+ h6 O set energy energy - 1" v: W. d% Z. A0 E# t
]0 l4 {1 Y7 u! y; A( g
end
" |7 h. x6 B0 i7 B9 ]. f; L# `to setup-patches
0 p6 `$ L8 s" v) d; J/ W2 U ask patches [ set pcolor green ]
( U/ e5 ^# I( h6 ?$ r6 Q, Send
: b, x6 @' m8 ` C" Z2 J# E1 b5 Lto setup-turtles
$ E8 ^9 |9 }3 v4 K create-turtles 100
8 Z$ Z' j3 G" X7 x& l+ Y6 L" [ Z ask turtles [ setxy random-xcor random-ycor ]# t: z. E3 {+ i4 l) k6 ~9 K0 t
end% X. y2 L# X8 E2 n, R- ], e7 z: ~3 F* T
to eat-grass
! V" q3 H( J- i# J ask turtles [3 R( f( k& t$ s( g. { T& q
if pcolor = green [; U* K+ L; t7 }) J: C1 F8 }
set pcolor black
7 k8 q+ G ~8 y& n- I! w set energy (energy + 10)7 Z% W2 z* H2 Z
]3 F% y/ C0 y7 h+ a' s
ifelse show-energy?$ |( f) R' q& \; s# V
[ set label energy ]
8 \6 F: r5 L2 B7 n- }7 b, p, H [ set label "" ]+ h; A- n$ I$ [4 i' I
]1 ~2 q, \, y ~3 Z( {
end
0 ^1 u+ q: ]4 y0 Yto reproduce+ y) q. v9 e' ~2 q6 b. x
ask turtles [4 D( N+ C* X$ o+ L! [, q% F
if energy > 50 [
+ l# C' i+ Y" q8 p) S set energy energy - 50; _- X, Y% Y( m" d
hatch 1 [ set energy 50 ]
# q) z6 F* b# N& J$ Y" |8 I! r ]
, I. Q( S9 R$ z ]
: @2 @" a& S6 g4 l* m iend! ~/ Q- r0 i& N6 H
to check-death$ Y, \5 h. j) h8 t8 j/ o! c M" U
ask turtles [9 S/ [$ ^* r$ {# M2 j8 G. ]
if energy <= 0 [ die ]3 d ^: _' r$ S1 E r; G7 K
]
- R9 [% l$ B- u6 `. i7 Tend6 C9 x+ z8 X8 A1 @/ |% A3 ^. s
to regrow-grass
: B3 n: D+ w- O' |; H$ u& C ask patches [# D, v, i4 U$ `8 Q4 ^; }- o
if random 100 < 3 [ set pcolor green ]
5 Y1 w$ I9 M! S% ?; F ]; c5 @0 ~" Z" V; [2 `1 r
end
$ n$ |, z8 c/ Z: }( _ dto do-plots
- V5 L* O2 x# R2 u set-current-plot "Totals"
# Z0 |, o& S" l7 L4 f. W set-current-plot-pen "turtles"
1 u) L& ?, x/ U' y* `. C M' ` plot count turtles
/ H" |/ R7 t) v L4 q4 A1 c; k; W set-current-plot-pen "grass"
. @- \$ B% I7 `; j' E/ l! G plot count patches with [pcolor = green]
% _! p" S# A; c0 ]$ q7 g& Cend
# X- {) V) L5 `5 [9 F可是运行时提示no such plot: "Totals"2 N; P& w: s3 M, c2 h9 I$ O' D
error while observer running SET-CURRENT-PLOT! U. M/ Q1 |6 i% n' b9 m: ^6 `) j( A
called by procedure DO-PLOTS- g8 A/ O4 Q3 V* \6 Q. F) I
called by procedure SETUP
# f4 m& U( ]6 z7 X6 |- Q' r4 K9 c called by 按钮 'setup'
. O$ W8 C5 v* ? x' e求大神解答啊 |