我编的程序如下turtles-own [energy]3 d. v' |5 n0 s z
to setup
+ F. n* }1 z! k8 d! G! i2 i2 r clear-all1 D+ v% e) I# }8 d- t( V
setup-patches
( m5 l- u4 ^4 }- y, \1 e/ c6 W create-turtles 100
' q8 D6 G- B2 C+ Y" d3 N! i( ~ do-plots4 G; J7 M, M& D' N9 z% L
ask turtles [ setxy random-xcor random-ycor ], C% x6 S7 a. R# k' I5 L
end! n( c" C: L9 c" N
to go
! u: [& z/ P1 X+ W7 t& L' `! @ move-turtles% }) W$ g2 r/ I$ M x" c
eat-grass! N* w, x0 _6 ]9 L7 Y4 }7 r+ y7 b1 r
reproduce9 ], D5 ~$ p3 R3 M
check-death
3 C) o/ z9 u# v regrow-grass4 }; I0 S, L. N
do-plots4 S+ r/ n% y! l' N }! b
end
( Z8 C0 V+ ^4 a4 C0 p/ Pto move-turtles
) m# Y) k) g0 X U/ }9 U# B Z ask turtles [
% }- F! G* K \: n right random 360
+ I/ ~9 J* v( A forward 1; K3 |+ y {8 v+ {6 ^. d
set energy energy - 1, n) K! Z h0 j3 x8 l6 x
]1 g4 b& y7 l D
end7 j9 d' w* N. d( R# r
to setup-patches. i1 K6 C2 ~ B z0 o
ask patches [ set pcolor green ]; f) D7 v% j! F T+ E
end
5 [! G: H3 A) m! U% ^to setup-turtles9 d4 k8 Y! {9 a0 J* G
create-turtles 1000 m( [; I4 G) E0 x5 P! @+ i0 o
ask turtles [ setxy random-xcor random-ycor ]" I+ E$ x8 R) l% A, H4 l
end
. G! P }( U2 d0 \% Ito eat-grass
3 L1 k! ~/ \6 z. ?/ i& G ask turtles [
/ l& E& T) e% @ if pcolor = green [ |$ N& {5 _- S2 u) s* C( Y
set pcolor black
/ J$ S3 z6 U& d' H/ f set energy (energy + 10)
& }9 x2 U& h( l# N# y# ^0 m ]
# n7 X, A- \4 Y: { ifelse show-energy?& }7 A" }) g3 B
[ set label energy ]
. e% i7 _6 |( B. S2 z [ set label "" ]
" A; z, z: Q( `* u3 s ]
1 i- U4 _: I% f+ o8 fend3 G. L, y% N$ p( J! y2 ]. {1 b9 v
to reproduce
: k7 I6 m3 b! J% y% U ask turtles [8 E' S4 b9 q) n1 e
if energy > 50 [( c* X. n7 P4 o$ @! X4 s5 q; t1 [6 |6 d
set energy energy - 50) Q% Y: P! R/ I, b8 e- t& e! p
hatch 1 [ set energy 50 ]" R4 s2 Z8 g1 B: z0 E; c
]. @% y3 O5 ]- v, k6 S
]
: f" @3 u0 y( d6 _+ tend
& B* V4 _, }+ r/ v/ S# a: l' hto check-death0 V% \0 `. l9 p4 Z( {9 z- a7 c# ^! e
ask turtles [
( y8 v" R& |, n/ }: I" A# M if energy <= 0 [ die ]
. X" A) p+ b3 Y% j+ _ b! c ]
' U4 I/ s3 _' \: Cend
; [* A. W% B3 n, T1 Bto regrow-grass3 J- P8 a# Y/ e) j% {
ask patches [
a M$ Q1 F5 c/ x6 d. R% Q+ h" M if random 100 < 3 [ set pcolor green ]
' j% X& K) \- k) g ]) d8 r8 d# p9 W6 } ^9 h5 g1 w1 l
end
4 h' U4 T9 ?; |+ s+ z& Tto do-plots) m- j: H; O& W1 ]4 D# d, c* Q5 E
set-current-plot "Totals"
0 G$ R: K4 f# Z; C% ~& A$ y set-current-plot-pen "turtles"
* E* I% e4 p7 r2 H plot count turtles
- _ L# M' `* c: `5 T# t set-current-plot-pen "grass"7 b( O$ E; N0 o; ?5 ~
plot count patches with [pcolor = green]& j6 x3 w) C1 j( K4 t8 M6 J
end
5 a/ `* e3 K& e! ?2 o可是运行时提示no such plot: "Totals"( C& g" V2 J4 J$ F0 t9 ^ F: ]
error while observer running SET-CURRENT-PLOT
F. R9 R. z; K& ?* g+ R' M called by procedure DO-PLOTS( [7 a# v* \* u4 U
called by procedure SETUP
: b4 u- _- u6 {( R3 U' Z& F called by 按钮 'setup'
0 U) w! N0 P2 f* a |+ `求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
