我编的程序如下turtles-own [energy]9 t" _; |! Z4 e+ k( ]8 A
to setup* {1 V5 Z3 J# T
clear-all
8 d$ o7 v d4 Q i setup-patches
1 r% I- d7 C9 p* f" @ create-turtles 100
" p7 ]6 k2 p: d2 | k/ o0 Q# M P do-plots
. |$ R7 c6 M, j7 o8 S: G7 ~ ask turtles [ setxy random-xcor random-ycor ]
# ?. Z# m/ |0 q m. G8 F' send1 A% B" g" U# t
to go
: y5 R8 F n9 z; B+ _1 [ move-turtles6 { ]/ u+ v* |# a; {+ T9 p
eat-grass
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check-death( y5 O; n0 o4 W! O, c
regrow-grass! z) l$ g& c+ Y
do-plots4 N& m' r2 }& _( s( _2 E) n3 q0 s
end
" S1 V5 e6 c9 F& K6 r& `( wto move-turtles4 ~* A& V4 F* s% |. q9 h' u" ~
ask turtles [8 y0 `$ S6 Y& Y# _( H( A9 s; _8 `
right random 360
7 q" V1 P* Z1 T4 t/ }" _9 i forward 11 f6 g/ U/ B( W
set energy energy - 1
' G3 ^. {8 g& O$ }% r3 u# v. d9 q ]
- a1 y) Z7 f. Mend
$ Y! g/ c$ m+ k Gto setup-patches Z i/ H5 t( {) t l9 b* A4 k
ask patches [ set pcolor green ]
3 {! W: m5 o$ \# P$ q( tend
( h. q. P" s* V8 D' l) q% S& Zto setup-turtles
8 X6 c( f6 m( ]! r) ? create-turtles 100
* D- T% R2 O/ X% m# K5 c ask turtles [ setxy random-xcor random-ycor ]
% c5 x* ^4 Y- ~& n' h. [: Mend: g0 g4 Q' m0 o6 ?
to eat-grass
% L- F: v+ J* {: {& i' J" n+ h: i- j( B ask turtles [4 T; _8 _5 C1 }
if pcolor = green [
2 E0 O% V: c# t& y, i- B( w set pcolor black1 l4 E- y* X' j/ T* j, J( f1 Q8 d
set energy (energy + 10)
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ifelse show-energy?: J; m1 e3 X8 \2 s
[ set label energy ], y) h. |( a( ^2 O- N# K
[ set label "" ]4 q1 L$ _7 i: E0 h" G+ u
]- h. b" W. q9 p5 t' }
end
' F/ I/ R! A8 {9 N; Vto reproduce9 D" o2 b+ b" i; n* L0 h8 x, A
ask turtles [
6 r/ N) M0 {4 g+ a7 y3 u7 } if energy > 50 [
' X1 M$ u7 X# X4 C- e' k% { set energy energy - 50
3 s; o4 c- o' g7 g M' ? hatch 1 [ set energy 50 ] z i; K v+ p/ L, V
]
7 m) t* a E4 M9 r0 g' d% k2 W ]0 ~/ `$ c+ Z$ v3 Y" Z7 l
end
* w$ ^/ K0 j4 ]/ S; O0 gto check-death/ _) l9 a; `4 F# E, V$ ?0 H4 n* b
ask turtles [
& Y4 Z( d: X, O1 Y, H* { X; T if energy <= 0 [ die ]
) ^1 ~2 ?9 v, L% g ]
$ }: I: J$ z/ H6 z m% pend
- D- \' Y7 Q8 C3 }! m8 v! fto regrow-grass
; [! j8 u, K# `4 }: b ask patches [- L' M# C4 A$ p/ \8 T# t) J( }) a+ L
if random 100 < 3 [ set pcolor green ]
5 v( J8 M9 A7 k9 o* y# ?/ i ]
: a0 O# ~3 B3 \+ ^8 A; h: o$ q7 }end
' {& I, c, C0 `6 g4 Gto do-plots
! L. ]& J6 @ h3 ?! t set-current-plot "Totals"" ^; [. k* N- w) [" _& y$ O. {
set-current-plot-pen "turtles"5 Y! C4 |# k( g) l
plot count turtles
& l1 G/ A8 R( d3 N% x5 L set-current-plot-pen "grass"
1 D$ f, U4 a2 c0 L4 @4 k) i plot count patches with [pcolor = green]
; X: d% d# j& }2 e; ]end
, L, X4 z+ A1 g9 \8 q9 s0 c# q v( C8 E可是运行时提示no such plot: "Totals"
. f5 T, y3 C D4 Q Y. i/ Serror while observer running SET-CURRENT-PLOT& j' r( Q4 P b" W0 d1 V
called by procedure DO-PLOTS( E9 @2 h" X) d" I* E
called by procedure SETUP% {) v4 U* P: {" L
called by 按钮 'setup'6 r' q3 j1 m2 ^, M2 L+ ~
求大神解答啊 |