我编的程序如下turtles-own [energy]; o- w' }+ p( y5 A- ?. w& c& U
to setup
" l4 p( }5 V% g% A4 ?* Z4 _8 ] clear-all
: t* x2 g; f: \% n. X. C. ` setup-patches
1 [4 F9 c( G- x G create-turtles 100
; A2 W- j9 y! q) [# B! v( F. o( l do-plots0 F) g2 E$ Q; P/ N" u
ask turtles [ setxy random-xcor random-ycor ]
- k6 G* e. \, c, m* tend
! T( J" Q' a+ U0 Kto go
" @5 h& y3 I3 Z+ A; R move-turtles* E+ _2 s& k( y+ p2 H `# h
eat-grass
" r h1 V' o$ `: h: G reproduce
" j, [- P$ I5 y5 U/ v% g check-death$ G% F, q6 O$ f4 h* n- X/ r7 R8 D
regrow-grass
/ j- G4 Y/ c8 T, r' U. Q do-plots' { v' K/ [' i8 E/ G1 o
end
7 S/ @ `* T$ D, Z/ k J. ?4 _9 oto move-turtles
( ^8 e* c2 P9 x& e6 o ask turtles [
. R; E7 C3 t9 D% H8 j right random 3601 m9 B8 j9 f% \8 i. s
forward 1' W8 y! n7 L5 X# ?/ k
set energy energy - 1+ I3 ~7 z: h- d% o: u
]
; i" |7 V/ E/ {6 H. o6 }: Dend7 l" Q1 \: B9 e& V! h1 d, _
to setup-patches5 X# v7 g* s9 Y. y) S
ask patches [ set pcolor green ]) T2 A; C6 U {8 E" |7 {
end) [1 W: c0 Q5 o
to setup-turtles
0 g/ a/ {: h' Z$ t2 H7 U create-turtles 100
$ c, k5 i2 d" j8 g6 _$ Y ask turtles [ setxy random-xcor random-ycor ]
: \" q M: {1 K4 K0 Y- Eend. P; n% a8 o9 |; z$ \7 i' l
to eat-grass2 R! i$ Z) \- i( X! t* ^# n! m
ask turtles [: w9 ~3 B8 b1 ]. l/ h# x
if pcolor = green [
Q5 ]/ i, n" S8 _' W O. j set pcolor black* }; C! j& |( P$ j
set energy (energy + 10)
: U7 ?0 C/ e9 F+ ?! M2 ?6 g ]% u! G% p L! J* y3 t: _
ifelse show-energy?
# E% [* l. }0 ]8 G) a* [3 ?$ U [ set label energy ]( Z" O/ t, b8 z" {/ p! K
[ set label "" ]
8 y; w9 e6 M0 P ]$ }+ S7 E9 [( r# x& l# H7 L8 ^( N
end3 B% I: t- ?0 V; Z p2 {5 k- ]
to reproduce1 W1 Y/ ~) S, U2 j% S: \2 R- M% u
ask turtles [$ i7 B( M& I, ?- a# C0 i- o
if energy > 50 [9 W- ~4 D0 o0 X6 I& f
set energy energy - 50
3 F w8 g- ?$ O% f% l3 V hatch 1 [ set energy 50 ]' e! a! ^1 y5 y. R& R
]8 b: n0 B( u; |& X4 {' @( V
]
" u" t+ I3 ?* gend( } x" y* N: T7 T R# x' j. {
to check-death
, {7 D+ \ w5 m1 n- \, w ask turtles [
?1 L0 m" `, G* E# @$ w if energy <= 0 [ die ]- ]+ v- M( b: [* N8 C' v
]5 a1 n! d5 X4 z7 b! B0 l n3 \
end
$ N; v' d% N; H: H! `' _* d& Q# ^to regrow-grass
2 O/ E" w' r& T4 p5 k* y ask patches [
3 C" i- d9 p8 a- M; y# W if random 100 < 3 [ set pcolor green ]
- v* i3 u6 Y9 x. ]+ y, k* L* r ]& O0 ~1 R0 i" n# M- Q2 n7 g
end
- Q( R& q0 y7 D7 N% ?8 u1 v) N' fto do-plots
' F( f/ M0 h$ M% m% t9 n! U set-current-plot "Totals"; \; {! R3 U, }" k
set-current-plot-pen "turtles"
! e# |8 R$ \1 s# i T plot count turtles5 E5 Z' G9 c. t* \# Q7 }1 C. D7 Z
set-current-plot-pen "grass"
1 G9 ?4 t$ @$ ?! q% z# \ plot count patches with [pcolor = green]
$ i( L3 v. D2 S' ?8 `# lend* u7 f: y& d) L, e2 _9 M7 v
可是运行时提示no such plot: "Totals"
* C) r, p! R4 H; u# l Eerror while observer running SET-CURRENT-PLOT; Y# b5 t# K5 [& Z% R% r' P5 D7 l
called by procedure DO-PLOTS
( p7 K1 ]2 `; N7 Y( m+ M called by procedure SETUP0 S, y# ^ `/ Z4 I) E1 s! M1 R9 i
called by 按钮 'setup'1 `! F: q: J0 w( T: ?
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
