我编的程序如下turtles-own [energy]" w' b% x, A6 @2 [# L3 ~' T$ w
to setup
* q" _: ?" s" Z1 h$ [6 x clear-all
( B$ F5 I' d W# b) G setup-patches# ~* q, |0 @. \. f8 p/ E- S
create-turtles 100' L. o# c5 _( c2 n; J/ s% v8 g4 ~% p
do-plots$ P5 |) o* O: t* X9 a0 ]& x2 x9 t& p
ask turtles [ setxy random-xcor random-ycor ]7 T8 U4 ?. c, j
end: w2 U7 C$ h/ N6 U
to go; A2 C: O7 Y2 t* k8 B2 z( E
move-turtles7 g) e' k' o2 J# W) z
eat-grass% y( F1 T- E+ B) [
reproduce
/ ^* L8 e2 Z4 S check-death, m: n' W% P/ d/ G6 V7 I
regrow-grass x! r6 l( \+ S2 h& H5 E% |' a/ Q
do-plots
0 z! }& |' E/ Q& L3 J8 s; {end
* e! U5 A; K& k( {to move-turtles
" z/ U3 U3 a8 ^ ask turtles [
2 C; A# I+ a1 t/ _! G" y3 m right random 3603 L/ p+ e6 `# g: s
forward 1
. A. y4 `& Q. O# B) n set energy energy - 1
3 F9 F; H3 ?# ? ]' h6 P, \8 r3 T9 v+ e
end
+ \) F2 V3 Z4 ~8 e: `" V+ y+ Oto setup-patches
$ g( X2 s+ E( G. Y3 @1 v) U! | ask patches [ set pcolor green ]- x% S+ [0 S. P* [
end
& j$ m z _( Eto setup-turtles+ Y- N7 X4 o7 y% x M7 y
create-turtles 100 N" W9 [# N8 Z; z. o( j g; C( b/ c6 R
ask turtles [ setxy random-xcor random-ycor ]3 n, D/ Y4 F8 z* |1 t% g
end
5 p9 j. K3 h% V+ rto eat-grass
% }) o/ z% y* x' F, D ask turtles [
, @* G4 E# }# e if pcolor = green [
1 J6 T- X' | Z set pcolor black
: E" E. V: H: ]: S, ? set energy (energy + 10)
4 ` z) p, Q: T, M ]
* P" J0 f: Z& P2 V ifelse show-energy?
& a4 \+ y: @; r, d% | [ set label energy ]( U; E j( \# l0 W
[ set label "" ]
. ]. L5 B: T1 I( J) ~% i! T6 i ]
8 d" S+ q% F, z/ O- tend# A0 H7 M' `+ U) r% p( d
to reproduce
9 I9 b2 b/ P0 a4 c. n( p ask turtles [
) ~3 l8 J5 g! B; C2 L0 y if energy > 50 [. R! ~0 q# v& |, [5 V
set energy energy - 50% ?, i* D7 w: a8 ?1 L9 _
hatch 1 [ set energy 50 ]
: t& w& a5 {5 `- v ]5 K, u/ c& c/ |( z9 W, O6 O K" d
]
0 h$ w8 r, i- N# u) d. u) bend3 i& e: v3 V8 ]& d& b
to check-death
5 `' X; F, @8 A8 D# s4 a' _ ask turtles [
3 R w$ A0 m- F: \ if energy <= 0 [ die ]
, p s* P: f+ X9 V, J! n3 [ ]
) r2 X" s5 U" Z8 a- r' Send
: g, ~: s7 ^1 H2 q! V0 yto regrow-grass
0 b3 k4 }6 W! p/ V9 u! q ask patches [& |$ q7 n, t+ C8 {
if random 100 < 3 [ set pcolor green ]+ {, [; `4 e/ ^8 ^
]* K) n* p* R& B9 W
end: x* E, U& S, n* r4 J1 S$ [* K
to do-plots5 m9 ~) J; n7 E1 n3 H
set-current-plot "Totals"
$ f$ }7 _8 s- @ set-current-plot-pen "turtles"
# _. q1 M5 V. x4 d# J8 ~; F plot count turtles
; K8 L3 K' ^: j3 B set-current-plot-pen "grass"
7 l/ F- h e" M1 l* a plot count patches with [pcolor = green]
1 F$ Y) O* l1 U. K q0 z+ @2 {end
5 h" f ]3 i0 }: f6 [# w可是运行时提示no such plot: "Totals"( Y D: l- Z1 U9 ]
error while observer running SET-CURRENT-PLOT5 `( h" t, G2 V
called by procedure DO-PLOTS) h( L1 O& G! }- D% ^$ H8 H: g; j, ?
called by procedure SETUP
5 w5 i! H. g3 K8 b8 w called by 按钮 'setup'! ^" g+ s; q( a2 D
求大神解答啊 |