我编的程序如下turtles-own [energy]& F7 `4 l9 e8 |! D- x1 E
to setup' ? G- L7 J& D _$ ]& l
clear-all7 |& h/ o$ I) s1 K/ N( y/ A! G" s
setup-patches
9 ]' u) M% o( H" Z create-turtles 100
& ?/ f& p$ n3 m: z X7 r do-plots
# [5 C" E& ^5 V1 Z" R: k4 t ask turtles [ setxy random-xcor random-ycor ]
8 }. Z) Y |( J' d$ o! ~; aend
) i6 Z" D) Z8 t5 i( B6 l7 P+ F; `to go
& M$ X* v6 W$ t! P3 P$ | move-turtles
7 V, C- \: S2 d* n8 d6 U$ J) S" l eat-grass$ u- X% s! A5 B7 ?: ]1 X, L
reproduce
& W3 Y7 e6 t) {# }1 Z1 b check-death
7 S7 k1 I+ m5 y" R% N6 U) Z! U regrow-grass
+ {' T2 `0 U2 L5 t do-plots0 `7 B" R' g u3 ~& O. f
end' |7 ?" l' z8 ]. a! i
to move-turtles
% T# M$ l" E# l* t ask turtles [+ i. |. A1 p/ j$ o$ k, Y
right random 360
4 n* [. i6 c3 c: s forward 1. i6 k& G: g3 c/ l- Z
set energy energy - 10 I8 b% T" e# T6 Z& g& w
]
% i4 M7 c& h) s" v8 u7 Z" E. Mend
" z: m9 N( d0 q' _+ E; z" uto setup-patches2 J+ s$ k+ p6 u8 N
ask patches [ set pcolor green ]5 ?2 l1 D y) C5 J0 k2 w6 K' }* k
end( [# E5 B, M. U' {3 q
to setup-turtles
/ |. `% m' ~0 w0 Q% _2 M create-turtles 100
# q$ f) z# G; w5 k8 P5 y: A, H ask turtles [ setxy random-xcor random-ycor ]
0 t% j2 `" b& |: H8 Qend
- v7 j: V9 ?6 Zto eat-grass2 s' Y( W! e) x
ask turtles [
2 h; F6 K3 y; @, J1 W! @% e+ f( N if pcolor = green [1 Y/ u; a7 p8 ~& k; E' B
set pcolor black: e! L/ @/ l I+ @4 H7 N, E+ `
set energy (energy + 10), a% k" p$ T, p, Y Y. E) u6 u3 }, z
], {/ ^8 V% a' G- v# F4 V
ifelse show-energy?! t: ^1 q: k6 ?9 p4 S) i: q
[ set label energy ]6 j# W s% X0 O0 e( M
[ set label "" ]
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end
Y. |' \- d2 S" D1 f3 t6 u7 Oto reproduce
$ z' r6 d4 A' l8 s. G ask turtles [
5 y$ \, d( f2 Q. P if energy > 50 [+ \) S) o! B5 E) q' K+ C8 |1 a% T( K
set energy energy - 50/ w9 n- L! ]5 c1 x
hatch 1 [ set energy 50 ]" L( [ q* ~8 B6 Z
]
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end
# F0 ~6 g+ D& c7 y B5 C7 ^, ?5 j' [to check-death, B6 {7 g) F+ ]0 e" v3 }+ ?4 i8 L: c
ask turtles [/ p$ u- @- S! Y
if energy <= 0 [ die ]
' }& V- b3 c8 X4 ^& @' v& ^2 K ]& ^8 ~3 J( s9 H. B f; D3 P. _
end4 K9 i4 ?, V$ _' |% D
to regrow-grass$ w1 M3 E" z- M0 W& d& j; y
ask patches [- h6 [( E6 o6 y9 I d b, y0 i
if random 100 < 3 [ set pcolor green ]
9 z8 c( q% }8 L/ k" M1 t ]
( m( l4 |& ^ G5 bend9 U2 A" C' {0 e! n m
to do-plots% k/ K! q8 U+ ~" x) x
set-current-plot "Totals"
7 D% O+ Q% d" K9 m C set-current-plot-pen "turtles", V* V- U& B) ~% z
plot count turtles, o1 _$ {! Q: t, D/ U& }
set-current-plot-pen "grass"
7 U# [; T: |, I8 x) e0 ]# `1 q plot count patches with [pcolor = green]
4 R5 F9 u, V1 jend
3 q. x/ |4 Y q: D- v2 r @可是运行时提示no such plot: "Totals"5 ^4 b! g6 U g% _
error while observer running SET-CURRENT-PLOT1 H# p) J# B" L# s8 x P
called by procedure DO-PLOTS2 P3 K- t; v8 X0 b0 o6 t( H
called by procedure SETUP
. |4 U# V7 F+ t3 k/ ]4 C6 g called by 按钮 'setup'
# d/ w4 A/ x% M- Q求大神解答啊 |