我编的程序如下turtles-own [energy]
% y8 [: W' h8 M$ h( Pto setup5 H1 |9 t$ [& O2 o3 F4 z
clear-all
( m; ~' F+ Z# ?1 {( ]5 \8 k9 O0 Y setup-patches! k3 i4 a1 J( F: z( [, N. d
create-turtles 100
7 }5 }2 E% s4 p( Z6 }- p9 r. _ do-plots9 d" i" C" a8 a7 Q \7 y
ask turtles [ setxy random-xcor random-ycor ]
; j5 h* y6 @8 Aend
0 C* u7 \0 [- P9 }' rto go
8 P2 k" X7 X, g3 R" v move-turtles
8 P. ?+ F- G: A4 t3 I: x- r" C eat-grass
% ]8 K# G% \2 z L( Y reproduce
; N5 A: p# j' c: m7 [ ^, @ check-death
; p( D. s5 Y1 y7 ] regrow-grass
4 i5 q5 \/ Z, X do-plots
/ Y6 ^4 }# T! S/ e/ l. pend, \# i2 j3 r. l3 z
to move-turtles7 R a2 B; J7 X0 {% y* \. U* |7 E6 p6 g
ask turtles [
& S( f% u% g: V; D right random 360
+ {5 p2 `7 v7 I p8 v* T forward 19 M- H p# `! O) C* ]( Y
set energy energy - 19 z, D5 `8 b9 d) Q# W; O& Q
]
1 O2 b6 [: S! |5 H0 ~7 zend
+ L1 L; P5 ~( s4 r. s2 G" m! pto setup-patches
6 g- f: ?2 d2 C: s& m* x ask patches [ set pcolor green ]1 [* E f+ ^2 z( O4 G
end
; W6 L6 x% ?8 ]3 Sto setup-turtles$ A% C* l2 D0 @% X" L6 X' e8 _
create-turtles 100
3 w. D, J3 b- V5 Y7 u, G ask turtles [ setxy random-xcor random-ycor ]
g. X) m6 R+ x& R- tend7 Q( y N1 \9 E X& l$ m$ {* Q
to eat-grass* i; T! ~3 Y C
ask turtles [
% z# I, A3 x7 p6 c if pcolor = green [9 \5 P) t: Z# I* }( ~8 k
set pcolor black
: _; g& Z' n5 r0 j1 E/ Q3 h set energy (energy + 10)0 W, Y" @! R- Y' W; ^/ F% b0 y
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ifelse show-energy?( l6 h7 }6 Q3 z6 S, i8 g
[ set label energy ]
( f, V# f6 ^4 ?7 I+ k4 T" U' f [ set label "" ]
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end h g$ P8 {6 q) ?8 F0 |+ h( g6 I( v% M
to reproduce
P' \. ~% ]$ ^# x( F q ask turtles [/ n, w; d$ s" W- n3 o$ |+ r) `
if energy > 50 [
1 s' i! A( }: o6 r7 r4 ?& O* W set energy energy - 507 y7 i: C0 C; Y6 S @* p1 X( S! x
hatch 1 [ set energy 50 ]: s# P" {! f5 u9 S
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]; s2 J- u8 F- N* `6 n5 q
end y& A8 K9 ~! {/ M, x. q
to check-death" W L& }" c7 k* n# R4 s6 J7 f
ask turtles [7 A, y8 x) Z1 Z
if energy <= 0 [ die ] u% L1 r! P; K1 b; Q1 B3 k, }4 J
]
& d2 t" i% [) Q1 xend/ \/ I7 L2 s2 m$ C8 f$ x. a: v( G
to regrow-grass8 j% p9 t3 U+ W' n! m# ], }9 A7 H% Q
ask patches [) \3 ]$ f$ v) O7 i8 A
if random 100 < 3 [ set pcolor green ]
5 _+ ]) a' ~& R ]4 P' b8 T9 _& p
end8 J$ A* O4 E2 N. N A
to do-plots( a$ D1 Z2 A, J" X( b- Q2 l, S+ ^
set-current-plot "Totals"6 X% k6 {4 N( S. b% B p
set-current-plot-pen "turtles"
7 I: ]- ?( [ l' i7 {6 d plot count turtles
: R0 j6 _/ y V w- f set-current-plot-pen "grass"
" H8 s2 j% U: A+ O plot count patches with [pcolor = green]
6 R/ j* V% O2 n( U: E% F7 w9 l1 yend
! c$ n4 I8 w- o9 p i可是运行时提示no such plot: "Totals"* x. x0 Y; O3 B7 T/ G1 _
error while observer running SET-CURRENT-PLOT1 o% J' P7 E8 W8 N" W
called by procedure DO-PLOTS
) l( \ S# @4 y2 w$ ? called by procedure SETUP* g; d4 O2 P. L- Q9 \2 i
called by 按钮 'setup'
8 E. {5 f) o+ A- h# g求大神解答啊 |