我编的程序如下turtles-own [energy]+ @+ A- m) g! ^6 y
to setup
# y; J9 Q& g* E3 U0 d; M! O clear-all
4 T; W+ H0 I, ?9 T5 q setup-patches& {: ~/ t" F8 @0 S; O z! F
create-turtles 100$ }, z# I) {; A! l9 n, z
do-plots5 }0 t6 X7 L; I D; R) c; d
ask turtles [ setxy random-xcor random-ycor ]
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to go: @ @ x) F! ]
move-turtles
6 O+ R5 j, t# p, S eat-grass, e$ W: ~# g5 x" W5 ^
reproduce
( J- M/ \/ p: H5 m check-death8 m! g% M8 r" M$ \
regrow-grass ?4 m7 _ c5 |) |( p6 `
do-plots% ?6 B- D3 K0 g
end
9 _5 K6 h* M) a6 k! tto move-turtles+ N9 L0 s* @3 W) }
ask turtles [
7 W8 w' J) z. J# J2 d* E right random 3605 P$ ?( ]4 X0 R! H# n; ^+ ?
forward 1! o0 [, j! R$ j O" f
set energy energy - 1
& h q/ R2 G5 W( x. n" R- _3 g ]
% I, v6 f0 V# k( dend, y l: `: M8 @; J; x
to setup-patches
( r! @9 w$ R1 C" w ask patches [ set pcolor green ]$ K& `% w4 q3 d! x
end
* J' P' p- W% ?5 c( v5 E9 t8 [to setup-turtles
% f) ~ ^3 N- p6 \2 `; g create-turtles 1007 B, c( s; [* \6 Y9 ~- a
ask turtles [ setxy random-xcor random-ycor ]" A, u- M6 x- S0 U% [( ?4 o
end2 j# [* j X* @4 i) L7 n
to eat-grass
8 q$ S0 ~3 j7 m ask turtles [# I* E- k# C& Y& f( C i* I
if pcolor = green [
8 F& l+ H$ p: e5 M. b8 Q) c' g set pcolor black; R2 N: X( y' e8 ?1 l
set energy (energy + 10)" ?4 L9 | v: Y
]
6 [: Y0 N" |6 P ifelse show-energy?
$ U' e( _( }2 G O! M6 B& o [ set label energy ]) O2 a( b9 Z5 P# U
[ set label "" ]3 C& G' `* ]) Q4 x& U( u7 Z8 W( h
]
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to reproduce
2 h: Z* e& Z/ } n3 w' |5 Z& g ask turtles [
9 I! @( K9 V1 E9 r if energy > 50 [
" C/ T" t/ J# P$ M; G" V set energy energy - 50
+ @6 t# H' ^! M* N hatch 1 [ set energy 50 ]! N! A7 G; U( y
]; ]& l6 Q' N( A' C: \
]0 J) k* R* v9 H0 C! k3 c
end) G' P" s7 C5 g" _, V
to check-death
L( V; \. Q8 r) L; f% k ask turtles [# h$ H0 y, s8 w0 A5 I2 X: c$ w
if energy <= 0 [ die ]
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end) B0 |- q" l5 M; {% ?1 |
to regrow-grass
; J" K2 t% Z. h: E% r* O8 f ask patches [
4 [- c. N% J, C' l0 o/ d. U if random 100 < 3 [ set pcolor green ]- W1 v1 B& Z) q1 C5 d9 z
]
) q# e7 P. ~4 o2 t0 p! Zend
) B3 l* x( D4 Y2 fto do-plots
$ A* y! o7 ?$ ^" y, h set-current-plot "Totals"
" J& J3 J( h/ `, \* _' C set-current-plot-pen "turtles"4 }7 q5 V, |& `9 o8 f- k9 D; }* `
plot count turtles* h2 `7 \- c8 ]7 J& ?0 o7 G
set-current-plot-pen "grass"
0 G" D( `7 ^+ G5 e plot count patches with [pcolor = green]1 \9 b7 M7 m. C) B% A, O% g/ P
end
$ |) e0 [( _8 Z可是运行时提示no such plot: "Totals"9 V: M! E# @ c6 f; L+ j9 s
error while observer running SET-CURRENT-PLOT/ |2 o: q; T" O3 a
called by procedure DO-PLOTS5 r; G( |5 i$ V( }4 R
called by procedure SETUP& v4 D5 i% S* V9 k+ d- l
called by 按钮 'setup'
6 | `! } y3 }7 R7 N求大神解答啊 |