我编的程序如下turtles-own [energy]
( ?% {& N- B% R I5 q" I% t: T; f1 Lto setup
9 |+ g1 ` m" n* m clear-all% z7 U4 ^6 Z- A6 P8 ^( e
setup-patches
" u' C* c( a9 o, l A% b create-turtles 1006 k( X4 T; @/ D. G# J$ {
do-plots
" ~# r, l3 d; P2 ~/ {. b5 V1 F ask turtles [ setxy random-xcor random-ycor ]
$ z. T4 M8 A+ |% dend! s. |& F# |: }$ \6 X# v% ^2 F+ a
to go( ]( l( U: w9 X9 z6 G# E
move-turtles, a5 S, A( Y/ [# r4 z! C
eat-grass! _- t9 f; t8 r( h/ p% g
reproduce
# U% E! a- K: V- Q% c check-death
. O3 F1 k( O& m6 ~+ i [ regrow-grass
$ V1 \, U" _! v6 R1 y- y) |$ p do-plots
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to move-turtles+ ?/ {8 }7 C4 R( _4 Z: s9 s7 Z5 P
ask turtles [
* Q' y2 i0 F/ @4 l& R9 P9 J right random 360( I4 f% N* U" d$ z
forward 1
' f$ }9 [/ @! ^5 Q+ r set energy energy - 15 f. ]$ t7 W; @/ ?! v+ L
]
% Q0 G. Z7 G# h1 xend
, f* |" m: M @1 Cto setup-patches+ f- s% e8 c3 R' |* j
ask patches [ set pcolor green ]) J8 l" n7 ~. v+ R z+ z! s
end
1 N: ^3 b! L" M# F' `to setup-turtles# O# W- c) W3 d+ [: z
create-turtles 100( W* x7 a$ c1 F" E9 D
ask turtles [ setxy random-xcor random-ycor ]& r6 D9 z8 S s1 S
end
' S& z$ Y: A3 K7 X3 p) s3 n- T* ]to eat-grass
5 R3 k9 ?. k& Y# l ask turtles [
% W" g' Y' F0 n if pcolor = green [. Y, m- k6 j; S
set pcolor black5 n7 `% F- w4 ]7 O( T
set energy (energy + 10)5 y8 E, b& J: W& ~- N! `3 N$ J3 j/ J
]
+ Q% K& x! Z" b1 ~4 ?. j; ?6 ] `, q ifelse show-energy?
( c8 C$ n0 X0 U) {8 o, } [ set label energy ]
0 d; L3 z4 v6 C" {8 V5 m6 k [ set label "" ]
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end
2 X; P/ V' W. D; Y4 p3 Z0 {2 Kto reproduce& w2 n4 @4 O$ k7 n7 N6 Z& {
ask turtles [& V n. f/ Z0 ~) M
if energy > 50 [
" O. E6 B0 K% d+ N set energy energy - 507 @, Y+ k% `* d! F' m
hatch 1 [ set energy 50 ] k0 v" U/ s& Z
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]
x# x' }8 J5 Aend0 C, t% x* B/ _$ }& l
to check-death- V! ?4 t+ ]: O3 L
ask turtles [9 c4 Q+ K/ s2 e
if energy <= 0 [ die ]( A( @+ t. M6 I' ?( A
]2 n. F! Z. ^' {4 \9 _, v
end
9 |, E: \: x- a% p* `6 |# E# cto regrow-grass
# w8 e- x2 U, m4 B; ~ ask patches [
6 b9 \- T$ [/ m" Q* p if random 100 < 3 [ set pcolor green ]' G6 w; p8 ^9 P: c2 p% v2 `' @
]
" M) G/ j& g' wend
2 O7 ]6 v( {0 d. Cto do-plots& \* N- b" `" f# W' [5 k$ W
set-current-plot "Totals"8 ^2 A" p" W# d
set-current-plot-pen "turtles"
1 C% h- Q2 ~# M0 J" w/ @ plot count turtles) O( U8 E; S8 n4 `4 e
set-current-plot-pen "grass"' `" s6 [& m: u# t8 h
plot count patches with [pcolor = green]
2 U# }( b8 w: r# c! ~end
0 w( | \9 x' g2 k可是运行时提示no such plot: "Totals": U1 n' I+ X0 W$ [2 J2 Q8 C
error while observer running SET-CURRENT-PLOT
: z6 S2 Y' G, t' t7 N- W4 \# |4 M# e called by procedure DO-PLOTS! D7 g Q& `# ?9 w1 g% ^% W
called by procedure SETUP4 t0 B# X; r3 u
called by 按钮 'setup': J% i; u& g, e( b
求大神解答啊 |