我编的程序如下turtles-own [energy]
' _* V8 U e$ B% g: Y G( n$ k. \to setup2 O/ ^, `; u0 ]" b& }+ W# r
clear-all I. H' ]: n( }: I& m; r% F5 b7 Q
setup-patches! O$ e5 q% n) u9 M
create-turtles 100
$ E9 W$ A- I: Y' i/ G do-plots
0 J# B: C$ u5 D W- B ask turtles [ setxy random-xcor random-ycor ]/ S' w+ n+ N# k# h; `' }
end
0 s, u0 b! d/ y0 z& ^7 {! A: Fto go
! ~" Z2 V1 J! A# u/ L# [+ M& U move-turtles
4 p; [2 Y$ p9 R5 h! Z eat-grass
4 b0 {) Q- Y& F reproduce
, e' H; i7 W! c! d9 X6 t: a& \ check-death5 e5 L; e6 `0 [. A+ R, p4 {5 Y/ m
regrow-grass4 A& m9 _% g. @3 f& [
do-plots
# \8 C3 C' E, K; {+ i' Uend
8 {. H. h" K- m: o" yto move-turtles
/ ~1 s4 `* @) S& u0 U+ p J6 X ~6 y ask turtles [
" _+ y3 s* u7 W( D; W8 A right random 360
/ B. k8 a6 R+ \1 O2 { forward 1
" }2 M. h8 l. f/ R/ o; T4 j set energy energy - 1% g; {+ M5 p0 H
]5 v6 t9 x! e" H# p2 X
end
* n5 ~% V7 p) S/ P4 dto setup-patches4 {, e# x% O4 s; j' ]: ^8 r
ask patches [ set pcolor green ]
9 a5 ~ q' L: I) ~- W$ Q2 F0 R" B, rend: _9 Q6 z; `/ O5 c4 w. o
to setup-turtles
: j2 M+ }* A& y9 X) W# p( d/ p create-turtles 100) t! h0 |' D4 o$ i' `
ask turtles [ setxy random-xcor random-ycor ]$ y6 U. u- H( a2 W7 y
end/ C! s& A. k0 A. K6 r: r
to eat-grass
: q. J' Y4 P' r ask turtles [5 W4 e9 P% e$ {
if pcolor = green [5 {2 C: ^0 d4 k4 S
set pcolor black4 @* c; O, h( q( x7 j* ^9 `
set energy (energy + 10)7 c! L/ Q7 o1 a( N6 b; _/ S
]* @# S( }4 R2 }' k
ifelse show-energy?
* Z& x) C( \- q) s [ set label energy ]
5 T2 {# Z# b% J* B9 x. l- E [ set label "" ]9 @/ U. \& Y+ N- z# c' U+ T) y {
]. m j. d3 n) E
end( x: I5 p) \) w: B: k$ a# B
to reproduce# [7 e/ J0 ?6 z- s0 s0 f
ask turtles [
# q% I* K3 p8 I* v6 R if energy > 50 [
) {+ y q9 [1 _0 V, _ set energy energy - 50
7 \( d0 C! O) K hatch 1 [ set energy 50 ]( E( W/ ^/ G+ F* d/ Y0 N8 L
]9 Z9 r7 R3 u8 y. B7 X
]* _4 m) ^: O" a" ^, w. ^( v! [
end$ ?2 J% g4 @* {( d
to check-death' w) Y9 J$ H! `2 Y, t
ask turtles [
9 g' d: ?' S# y. w; N3 q if energy <= 0 [ die ]+ x4 |+ F) b4 x# h' T
]2 f. i5 a% z9 V& b% ] W1 G( A
end- S: V! ]$ S5 X* s4 |( n
to regrow-grass
; i/ D7 K0 }, K) t' Q) q ask patches [
2 R' _0 ]& `' p" K2 p0 G/ b if random 100 < 3 [ set pcolor green ]3 z8 K" f' w5 X7 Q7 O% g+ s, N
]
+ s7 W9 A3 p& q2 C6 C! t* d5 N7 Tend! @, S E) V+ ^6 I( A
to do-plots4 }! G, ?6 D$ X N4 O! j
set-current-plot "Totals": a3 D$ d/ \/ ]; A# n0 t* w5 E; g( H. v
set-current-plot-pen "turtles"- {. j& t4 `5 _
plot count turtles, [2 q! F4 v& B/ E! Y8 Q% x
set-current-plot-pen "grass"( S- j. `: k. u& O
plot count patches with [pcolor = green]
* m# N2 q. Y; M+ r7 Dend
' }( I5 k* L" `8 n m. U* S- q可是运行时提示no such plot: "Totals"
- b9 c+ T! l7 uerror while observer running SET-CURRENT-PLOT
& p _5 R* R$ l5 f; X called by procedure DO-PLOTS
4 g" r4 z) x- R" ^/ N3 u called by procedure SETUP
( i6 ~# b+ y4 g8 `& @/ S; J, u called by 按钮 'setup'* y! ]# w4 {$ l) M' }& s
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
