我编的程序如下turtles-own [energy]
& h, V6 l; n% Gto setup% x: N7 d$ Z8 E2 F" |" m
clear-all, k# P# z0 q+ ~" Y/ M8 O. W
setup-patches( v) }. m9 ]5 @0 z/ u# ]% U
create-turtles 1006 f' d: n* g( _8 h8 O c* k
do-plots
& ~# t/ V P: P o8 c0 Y ask turtles [ setxy random-xcor random-ycor ]& h$ ^8 x' ^9 A: G; p# [( L
end6 h, m1 e, Y* F/ Q. B- `
to go
6 x ~, U: B" F8 t) b: V move-turtles- r+ T: ~8 z' I6 a
eat-grass- L4 d" \; F; J! O1 `5 r; k
reproduce
$ M9 Q1 J D" t/ }" Y9 z check-death1 @/ X) x& R5 Q# R L: t. V+ ?: [
regrow-grass
6 g4 k* t1 x+ f do-plots
) U( k1 T! p3 ]6 O0 eend
" ~ H" N- y, B e7 Kto move-turtles8 ?" }) J& f" X1 e# g' \7 e8 M
ask turtles [
; E: A L1 g8 b' X: v! T7 V) M right random 3600 s* n0 c3 c6 |; l+ M; f
forward 1# U* Z1 l' E) F$ |. f& w( q
set energy energy - 1
3 w+ J$ Q3 w/ ~% z/ X2 C- H' _1 K2 F ]8 t: Z0 F) S3 T, p2 s- S3 E
end$ o0 A/ a u9 ?! e
to setup-patches) M' O9 }: W ]; b
ask patches [ set pcolor green ]- Q, o g' ?. d F. N* P0 {
end, N; u* c$ [- n; e" r0 ], N( Z0 [$ T
to setup-turtles
' m B3 m I3 I6 u/ l5 v+ d. t create-turtles 100
2 K, [/ }' E4 w% V" X$ m ask turtles [ setxy random-xcor random-ycor ]& Z! e' A4 |) K% c2 y
end
3 b+ H2 v/ Y. I& a3 B! s' G# Fto eat-grass
; f6 L9 x: j V2 u ask turtles [0 a, B1 g' M( L
if pcolor = green [2 O) `& _3 I- p
set pcolor black- i( k0 ^1 m" Z4 M" U3 u' f
set energy (energy + 10)
4 P* y$ o% s% g0 |1 H2 C ]8 N2 q3 V' q; \& f! R3 i
ifelse show-energy?
. Y. x; d; ?+ `* u [ set label energy ]
( w, o2 m4 b) z7 @2 y! V0 l! j [ set label "" ]
5 p6 B# N" m% Y. a ]
H, {3 M% V: h8 ^. l& S4 Iend H8 y- p4 i. h! O. A, I
to reproduce
Y, z' H% h+ b+ ^) P& ^2 p ask turtles [( n$ z" F' g1 N% D+ w6 o
if energy > 50 [6 F. \# Y, |# X. I5 n
set energy energy - 506 |7 s u* J# J" _! B) H, I
hatch 1 [ set energy 50 ]& y- A- l: y }9 T
]7 }7 b0 A& [& L' {# l E$ }( v! B2 h
]! J/ @+ Z6 p; r' S
end5 ^& Z2 n9 w& G
to check-death* _- {: U4 v8 _7 F$ N( d5 g6 }
ask turtles [
& l; I& [( R; u3 p- z, i. |$ F0 j if energy <= 0 [ die ]
0 ~/ m1 W S- r) h( d ]
/ H& G3 y1 A7 _ E" K. eend
0 Z6 B6 N; \6 g& O: h; L0 g' @to regrow-grass
$ U4 `* c; K2 S ask patches [
1 ?' a. v5 ^. d if random 100 < 3 [ set pcolor green ]; O, `1 z: O0 Q/ v# M
]0 q" ?! U: r/ ]
end
" }8 i* }: f/ g+ Yto do-plots3 _" u) T- H& p2 g- m
set-current-plot "Totals"
/ z( y9 l" o8 B+ V$ L- Y( o2 P2 O* A& O set-current-plot-pen "turtles"
, Z1 H: V. m# f plot count turtles+ d9 t; |' h$ S0 w6 [ R
set-current-plot-pen "grass"" p c/ G% |% _
plot count patches with [pcolor = green]1 z( L: v+ q4 ^" v K7 G7 i2 w6 ]
end
# d6 P Z8 M+ y# }/ Y. h可是运行时提示no such plot: "Totals"
3 G; C! C9 p7 S! s0 _error while observer running SET-CURRENT-PLOT* u0 d3 H. a% b" E/ P4 K/ I/ V
called by procedure DO-PLOTS
`, z U8 }( d- ^7 q( _ called by procedure SETUP
1 W; t. |% \* X! d- p ^$ B called by 按钮 'setup'6 e. `/ s3 B" `0 g
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
