我编的程序如下turtles-own [energy]
# }2 e) c" \; ]. m( sto setup
& C" ?0 x! C' \0 Y5 K clear-all
/ I. ? z, o$ z8 F, T setup-patches
' Y. m, `& U; ?0 c create-turtles 100
. F4 }2 u9 Z2 h1 u, L. c4 U do-plots
) T, W- q6 @) k1 y% v+ o6 S& ~4 F8 e ask turtles [ setxy random-xcor random-ycor ]
$ q( T; N# D+ c; a" ]: I# e4 V5 Iend
7 \% f9 w' x/ P4 R, i; Uto go
c# W$ o- t# f move-turtles6 t5 a- \. s0 {" e6 [5 J
eat-grass5 w" l+ o. {# U7 w% H
reproduce
4 x! G4 C( f4 D; I. b6 K( L check-death
0 T+ }. X6 r ^+ y1 u regrow-grass! s3 W4 G+ ?6 [/ Z7 N
do-plots
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to move-turtles% Z2 d& i1 a j' ~& ^- s# Y y
ask turtles [
' b2 @- z' u) X# h9 r6 f right random 360
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set energy energy - 1
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end
# M2 r9 F0 P' rto setup-patches
# w. H- e( M) I, q" J5 J/ n/ f( ] ask patches [ set pcolor green ]. S8 v, O% T; z* I% a1 o
end8 _& p& f: z B/ D9 ~+ V$ i/ ]
to setup-turtles3 R; c# H0 I" Q" a6 t; {% U9 \- N
create-turtles 1002 H" h2 O+ d2 y( ]: b
ask turtles [ setxy random-xcor random-ycor ]
& J9 S" d. |" M. Pend$ w# I. n$ _7 @) N1 n% Q
to eat-grass
! B+ Y7 i/ F# }- A# J ask turtles [
* X4 i0 s# f0 A8 T, w if pcolor = green [* k, E) N. L( u( w/ G
set pcolor black
W ~, R( h& D9 h3 i3 {- x set energy (energy + 10)
: }' _ Q P d; d2 z- b6 ~: e- c ]
, {4 u9 m" t! U+ b2 c/ k! F# K ifelse show-energy?
& i5 V0 \6 ]+ \ [ set label energy ]
7 W8 h6 p* `& B [ set label "" ]
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end
+ R0 Y4 S- b! G. P1 g/ Ito reproduce6 v' Q) o+ s2 }3 v* s6 b( S6 j
ask turtles [! q7 V) T0 f2 z7 E4 a
if energy > 50 [4 `/ D% }7 v' h6 }5 F1 L/ R4 O
set energy energy - 50
9 L! a2 F6 B2 h2 F- f hatch 1 [ set energy 50 ]" X5 }# C) n, s S
]
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end
+ {0 A% ]. ^: a2 `4 c* K, Bto check-death
]4 x* A+ t8 y+ k ask turtles [
. }' r. J) N! g1 N. C2 l2 Z if energy <= 0 [ die ]
* N1 `* L+ \& ~6 U/ e1 B0 f ]
( \. f# `3 ~/ b6 C9 jend; ` u" h; u& ? y2 Q
to regrow-grass6 I7 C3 h: b5 @5 e# C# F
ask patches [. _6 M Q B9 P G( b/ L
if random 100 < 3 [ set pcolor green ]: Q- j' m7 [7 s; N
]
2 i* y; R1 a" X, C; L9 I7 k7 c$ kend
7 B# Z6 U+ Y3 E V+ c8 t% Nto do-plots
# z0 u4 _( G3 O& e: ^. c& P set-current-plot "Totals"
! m! E: H. j% l& |5 A5 A set-current-plot-pen "turtles"
& S) q4 _3 F/ F& Z$ X plot count turtles
1 k& z2 t5 q1 I set-current-plot-pen "grass"! q" z4 s" D/ A+ H" k) w
plot count patches with [pcolor = green]( x! J: M5 `8 s) T
end
3 b7 \5 B, ^9 q2 H% _可是运行时提示no such plot: "Totals"( K2 \' ^7 U$ ~: [- `
error while observer running SET-CURRENT-PLOT, b8 A U! k6 x0 W
called by procedure DO-PLOTS/ t- M2 Z& e0 z& G
called by procedure SETUP; \ V2 e# D. N; ]8 ?3 T
called by 按钮 'setup'
1 M' W6 u: C7 p9 A0 b z求大神解答啊 |