我编的程序如下turtles-own [energy]+ G: P# W) K: R2 s' l6 P# x$ V8 X
to setup5 _& N& j# B% r6 k& x3 }7 R
clear-all
1 `& M N5 I% \/ a x setup-patches
# G- R) y3 d- @/ U4 A. A+ y create-turtles 1007 h) H" `! z, @4 @7 g
do-plots$ w. k. t0 W8 l; s
ask turtles [ setxy random-xcor random-ycor ]
) b% u& K" g" i6 }* X8 U) Jend- o6 n {4 x$ b9 ]" k+ \
to go7 Y* E6 Y2 ?6 K/ `
move-turtles
0 _% d: L' W/ [) q7 W! t eat-grass
0 z% N/ ^9 w% L5 m- s- Y* H, r2 f reproduce
* d5 u Q: U+ U0 q; r- _ check-death2 o; h7 J7 b9 s0 r
regrow-grass
+ h" t( S: I( _( j. n) U do-plots- i/ }* R& P$ F3 N) [
end; ?" q1 t! e" K
to move-turtles! g9 L+ d1 k( b* t3 w& r
ask turtles [
9 o( L( F0 H$ q right random 360
7 r! }9 R: c5 L0 K1 g forward 1
- I* r2 ?' q# x* L+ e r set energy energy - 1
- s; Y0 O* ~5 P/ {; o* j3 w ]
: }: |) d# y$ z3 Cend* R( N1 X; o7 G0 ~; @$ y" m
to setup-patches
5 J5 g7 l4 ^1 }' f0 b ask patches [ set pcolor green ]
. y! X1 R5 |2 E: H0 }; ^end
' {( W0 P; M! s' }/ |; s; Yto setup-turtles6 ~, U1 {) b6 }4 [
create-turtles 100
) h- j/ Z8 M" j6 L3 z2 {. m ask turtles [ setxy random-xcor random-ycor ]
- y3 i$ H' N8 {9 j2 w8 mend+ f. X- N k* B
to eat-grass$ E. W: G# Z! ]9 i
ask turtles [/ L) z5 o5 b5 l" I; P+ C
if pcolor = green [; c* g; F% R! o% n$ A# s9 w
set pcolor black4 M7 z5 ~: O* _+ a
set energy (energy + 10)
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) k4 C1 e+ C: V K; A ifelse show-energy?
% O# z g( l n% Q% p, _5 C [ set label energy ]9 O; R Z, j" A
[ set label "" ]! m# ]4 b o% I' v8 G3 n
]1 E: ^6 \+ h) N
end
* c* j8 \( o: y- g2 t# p; ~4 @1 Fto reproduce
: P9 ?9 k+ z: z ask turtles [) T1 _! A$ _/ l( i
if energy > 50 [
4 j% i; g- p& T1 L2 V% p8 t set energy energy - 505 Y# `; B- S4 a Z# l0 S' c& n
hatch 1 [ set energy 50 ]; l. L" i6 h, r) }$ r) o
]
! I, r+ F1 R2 y% t4 ?; W ]7 X' W+ c- s. ?* V
end3 y$ u. |8 z; N# ~# M Z4 ~! }
to check-death; [' R/ R+ V B3 r- e* z) H
ask turtles [
$ y. j5 g+ ]; M$ C* u if energy <= 0 [ die ]! n5 {! v1 m( k* e( m
]8 x1 Q6 [* x( D A2 U
end* C' b8 l' R- z, T1 q* a2 s2 k% y
to regrow-grass( l$ ?: k K4 N0 u
ask patches [
" p- M$ D" X9 p6 E+ F! e. Z4 I if random 100 < 3 [ set pcolor green ]
! |2 m z! k* O {# y4 J ]
* V- K3 b0 o: t# s$ S% y& ?end$ P8 q" g& U, v/ m
to do-plots
1 l: _6 r5 r6 V: }& E" B* \1 K/ h set-current-plot "Totals"! }" w% Y4 H/ l6 C( y
set-current-plot-pen "turtles"7 P+ G) o* M5 `
plot count turtles
- n3 K" S1 E5 g; i- e set-current-plot-pen "grass"
5 l. o+ X+ l: U# @# K plot count patches with [pcolor = green]
$ _8 V" b9 n% V3 y1 B: @% Zend
: z4 P# H; w7 d可是运行时提示no such plot: "Totals"8 [7 j) Z4 r% o0 I/ E% _) u
error while observer running SET-CURRENT-PLOT& b: v* e# F0 c1 u& P! Z
called by procedure DO-PLOTS
/ i8 q+ m3 K+ U/ G* Z+ d v called by procedure SETUP
$ `9 O7 \' A' r2 X! w called by 按钮 'setup'
' z6 X0 w) p& D! a求大神解答啊 |