我编的程序如下turtles-own [energy]
- r/ [' o4 c& Pto setup
+ h7 ? Z* X, W, @5 F! R- }% b clear-all
8 ?; _" v1 t4 o# r. f; C/ s9 Z setup-patches4 X7 t7 d% q; Y
create-turtles 1006 }3 X1 q; N( V: A7 C5 m
do-plots. H; ]* }2 K8 p1 d7 C
ask turtles [ setxy random-xcor random-ycor ]+ a. u+ s9 G& q6 _
end
' R. Y1 r9 U; I9 ?to go7 E/ k! Q' ^, b( E
move-turtles
: L/ {5 a9 B" s7 P eat-grass; L+ V( N6 p3 ~
reproduce
6 r: M! C! h, g$ y9 o) V6 }$ E check-death
7 A- D4 u' u/ U9 @ regrow-grass0 K1 @# o: P: o8 N: j' n% E
do-plots4 f" M. _. [$ a, p
end0 g N, I8 f1 U1 q& y
to move-turtles
7 `' B# O: }3 t+ j0 G. u. m6 E: S ask turtles [
: a/ ^( s) m0 p/ E' o: a. H3 ~" I right random 360 S+ Y0 w; Q) _2 O# l
forward 1: Y j$ [0 R- ~5 G( d! {
set energy energy - 14 L# j- @+ X% H) t- A! U8 k
]
/ K7 z* @! Z8 Qend0 m y3 q) z4 b* V. T6 h
to setup-patches
{# w% \9 P# P# N. I( l! } ask patches [ set pcolor green ]& u$ o: s% \0 t& I" ?6 {, O2 o
end
$ \/ P" o2 w) E# L$ S7 f/ P& Uto setup-turtles
+ v3 v% f' R, d" | create-turtles 100: z0 I) u% F1 y- h3 f- {: s7 L
ask turtles [ setxy random-xcor random-ycor ]
/ x2 j+ R& M! N" D/ c& |/ `end8 G& O0 s8 o8 b' L
to eat-grass' a1 Y- r4 J g3 P' A% d; P
ask turtles [
6 b5 ^! c5 W' ? if pcolor = green [
3 ?& p# J' H. U C set pcolor black6 N8 a- h5 L' r( ], }
set energy (energy + 10)1 _2 _' E! L: n
]' F c8 D* U0 ` D
ifelse show-energy?
( B1 P4 L I% d$ r0 } [ set label energy ]; e: n# t" ^& I" ?! F! }2 I
[ set label "" ] k6 m8 A5 \: A) i/ E
]# M( Y3 y" R$ T, G E
end
; l+ h0 p/ b/ \% R; xto reproduce4 d( P5 e0 O9 i$ b/ }
ask turtles [% Q' |" _2 ]) A j6 J, |& O
if energy > 50 [
$ x: B* f# t5 K& ? set energy energy - 50
- O: S2 Q; V# X! J, F% x hatch 1 [ set energy 50 ]1 h1 N5 v% Z. n* [8 U1 T" Q/ z
]
. T( h1 i. {2 K5 O* |5 S ]
. Q; ?7 X) T. E! [* E' @end
" O7 m: T+ b* N' |to check-death
' W4 G# t% I, }5 V# M# g& E% O ask turtles [! V$ Y% R, V0 A }5 s3 x y
if energy <= 0 [ die ]
6 [+ R f( @7 W3 g: {. w ]
% X5 s6 C2 W$ l z6 N. p0 n; qend( [: }0 K. p2 Z' ^$ {) K
to regrow-grass8 H: ?: B$ G( h5 @( r
ask patches [, \5 Y) u! y5 ^9 n8 [
if random 100 < 3 [ set pcolor green ]
( Y* P8 R) P7 R8 w( q2 ] ]2 t3 z5 k! a% i1 f, a3 `- A
end
% X2 S3 z {' yto do-plots; S2 ^ I) m. p5 e0 q
set-current-plot "Totals"
; o' g+ h6 Q7 F; f set-current-plot-pen "turtles"
5 V. n) ]" V8 X# l% E$ y# e plot count turtles0 Y( W7 y2 f0 ]2 P2 K# ]5 z0 X8 }( X
set-current-plot-pen "grass"% p& U7 x, l% [% b( I `2 F: G
plot count patches with [pcolor = green]
1 V: U3 T, O& @+ gend
n/ @' c }4 r+ }2 w: f可是运行时提示no such plot: "Totals"
. z4 ~- L4 A" o' z6 zerror while observer running SET-CURRENT-PLOT
# X9 j2 D7 i3 s' l called by procedure DO-PLOTS
8 q" N0 i0 \ G) [! E2 ^ called by procedure SETUP
7 a" `4 a! v/ R# M called by 按钮 'setup'# M2 U8 Q. W% v0 _9 P* j& U
求大神解答啊 |