我编的程序如下turtles-own [energy]' Z1 o/ c% C4 h' X: |8 g. N. Y6 i
to setup
. Y, B% i8 U- s3 G8 y/ x- a, A {- J clear-all
7 z+ q% Q9 v7 o+ d setup-patches* z$ M6 G- |6 a9 c' y2 s- l' U
create-turtles 1001 Q" j- f* c' ?% n- I1 e' N: q; Y
do-plots
" ?! r" B. t) h* x8 f# w) F ask turtles [ setxy random-xcor random-ycor ]
$ p* N5 g, d/ o6 l& ~# j Vend
; j5 y z* x: {% ]( Sto go
" i$ t& I& w. Z# q7 A move-turtles. `3 d) K% _* v) o9 a1 D
eat-grass
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check-death; L# B, L& L4 W" L
regrow-grass4 m, K: p0 ]5 z- V, ~
do-plots
/ U6 _$ h& d* ?2 x7 E$ D7 Oend
! g3 s1 \% ?) T7 l. rto move-turtles
& f ~% g" M4 T. f9 G) o ask turtles [
( J& X) ^3 e6 c; ?) u! Y' b. O4 W right random 360: O1 S9 ~! |( Y2 W
forward 1
. a3 |: D* F( h6 R set energy energy - 1% m, a, Y4 s; L
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end- Q; Z! z7 w+ o& ?! D
to setup-patches
# E8 C( m3 P: }0 w# X: `% V m ask patches [ set pcolor green ]
3 J1 D# Y' W* U9 w0 }0 C: dend% ?7 I$ j8 |: j% ~4 n6 E X
to setup-turtles
; m$ F$ S/ v, x% y; Y' r a8 D create-turtles 100; I% o" _2 _* |; Y# r( h' U
ask turtles [ setxy random-xcor random-ycor ]# K3 Y4 X x) s5 G T( ?
end+ i& r: T# `" p( |( m3 r
to eat-grass
# Q, [ W1 W- ]& q$ g2 n$ |0 F5 ~ ask turtles [1 h& r* l; U3 S c8 s8 r5 `
if pcolor = green [
7 {( M9 A, O5 F( Y& z7 T set pcolor black
! W+ \# d3 m: B9 ], F+ s! d set energy (energy + 10)
& F7 H9 H( {* v& O ]
+ D( e- \: L4 w1 x$ a8 V ifelse show-energy?6 e8 H9 f' a- W2 m! D; a
[ set label energy ]/ \6 U. X& x# ~# N# V
[ set label "" ]" i9 I$ Y6 Z/ O- ~3 F5 z
]# X4 E: c$ u* Z* B7 ]3 A
end& g4 T& G6 j4 L: c
to reproduce$ `) P0 W) J' A. d1 ]
ask turtles [1 c+ T0 s3 ] V) V' Z$ q
if energy > 50 [7 I7 C" v& m) ~* L
set energy energy - 50
- Y5 _3 {+ p) {5 w& h hatch 1 [ set energy 50 ]0 }4 r0 T" H2 k! r& L
]
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end# O$ I/ u @: c" N( X
to check-death
: T2 q/ Z4 b' o8 O ask turtles [! [/ a% n$ k. r
if energy <= 0 [ die ]
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end
# D/ [) Q( y, m+ T. a' E! C Yto regrow-grass R S7 v6 C* z* U) b" b2 U
ask patches [9 T/ z5 g( r* T9 K' T6 L+ J% ]6 P3 S
if random 100 < 3 [ set pcolor green ]" {% S2 z ]5 N% D
]" T9 K0 l! P% S; T
end$ u9 }6 K1 N0 w) ?' T8 [) r/ R1 m7 T8 l
to do-plots
8 S, s* f+ \3 }* D y# C" ` set-current-plot "Totals"
+ D7 R4 S0 p' T2 R set-current-plot-pen "turtles"8 g1 x6 [0 g$ [* t. N' ~' R
plot count turtles) f9 M/ W h4 _" o7 c
set-current-plot-pen "grass"$ D7 N1 R7 }% j3 g% @
plot count patches with [pcolor = green]2 g& P- }5 `7 k; |
end; Z& F5 V2 \: b8 u
可是运行时提示no such plot: "Totals"
8 a I. u6 w' ~8 @' Q* ~7 l( Perror while observer running SET-CURRENT-PLOT. ^0 A9 _2 O1 c1 g( ?4 o T: f
called by procedure DO-PLOTS9 e8 T+ }2 F3 |" u+ u
called by procedure SETUP3 l' I R( }* Q' n- e3 W
called by 按钮 'setup'
' q9 s8 Q4 t% T$ p7 L求大神解答啊 |