我编的程序如下turtles-own [energy]
) o% N- Z6 M+ R7 g/ k/ ?& Mto setup( \: [& M8 M' B3 q
clear-all
' u# h- @! ~! k7 Q. b setup-patches. K' r: a* `/ o
create-turtles 100
7 E4 p& l/ D1 w* F/ s do-plots; m8 {* f' ]# y V; @
ask turtles [ setxy random-xcor random-ycor ]# ^8 N' b6 f' _- S5 h
end4 f/ \9 A4 E, V$ Q& P0 ~
to go& j% s4 M. z" c+ k- c, v
move-turtles
' T$ a3 Y* s- W% @- p+ U eat-grass: h( X' q4 N& P5 j$ H6 H. O# O
reproduce! ^0 V0 H: L* [+ K, L
check-death/ o$ H; d% |2 a; g9 [$ V
regrow-grass7 } g# \# t9 Z4 ?6 ~( j1 j7 a" Q- c
do-plots; i8 F/ A" D7 H' G% p
end l: I( |* b D$ T: w- h! X' U
to move-turtles
, b# V0 a' T% _$ S! z ask turtles [
: e, i# X: h+ v# ]* m right random 360
8 v$ v: h4 g3 n, R' T$ X forward 1( e7 i8 k& ]# N2 r! W/ U2 i
set energy energy - 1
N$ X* o9 J& s- X. q ]
- ^% O5 ]) C* g3 s# h( E: wend
6 c. h$ `7 P Q# m$ w* s. zto setup-patches4 i' r+ i" h. ]$ m3 p/ t2 Z* U
ask patches [ set pcolor green ]# G6 t y8 e' Y. }5 N
end
) O# a! t- o1 s& b7 ~ T3 mto setup-turtles
( ]4 \! a% z5 B' l* @ create-turtles 100* g t) V# Y/ _5 U/ w
ask turtles [ setxy random-xcor random-ycor ], ~* { X9 _* q: a' I1 S7 a& r
end8 M) O$ A; f, B
to eat-grass# ]& {- I, N: a6 T7 P |, y
ask turtles [! u# m1 [! e: z3 W6 a3 \
if pcolor = green [8 A' s* {9 A/ f# m
set pcolor black+ I' H, }$ G7 I
set energy (energy + 10)
: o6 z9 |# `9 T+ W+ }1 b/ m ]
. N: X: `; `+ J5 K4 j ifelse show-energy?5 [4 ?) u N/ L* z ^, a6 _
[ set label energy ]
( {/ \: V) D) z, K3 R [ set label "" ]9 v+ S4 ]' H5 b% H: v
]
/ c$ G( q9 U( c9 }9 V5 O$ O+ d2 V: Xend
$ k3 O0 {! l$ J O3 T! ]to reproduce
' ^1 g/ v( w+ w5 ]* C ask turtles [" r2 f# j- Z( r
if energy > 50 [
/ \6 A# @, m, k+ G y set energy energy - 50
; ~4 d/ [+ S4 r% W- G# t3 q; Y hatch 1 [ set energy 50 ]6 \% p; j( {. H6 o; K$ | x0 k
]
4 R# ^5 D; [, x ]) m/ Y1 N- b( T' e( @
end
8 q: a8 }! b# ^( J' l- Gto check-death
1 Z: g' W2 i* C' j! { ask turtles [
$ F- w' d: @2 e3 e {& h if energy <= 0 [ die ]
8 p/ w) N! `/ G, W8 [# m2 N ]
2 f( \5 j4 h+ d6 Kend3 E# C( o- Q! p3 Q' _% e! p' L6 N
to regrow-grass
3 h' q) M. ^( ~2 {( h ask patches [
5 A1 h$ N9 Q) b! W o \5 [ if random 100 < 3 [ set pcolor green ]0 b& m- S7 j# h' N: O
], u) i8 T/ I9 x! V) G d
end, U4 p! [- p& o$ T R
to do-plots- P* x5 V8 F+ E5 O5 Q1 Y6 p
set-current-plot "Totals"5 M7 `* T( ?( G5 i' ^
set-current-plot-pen "turtles"
( c6 ~: H" a7 k$ o plot count turtles
7 d) Z" W$ s- _8 G: [$ @ set-current-plot-pen "grass"
/ ]' e% V+ r" R% ? plot count patches with [pcolor = green], I, E1 [" Z0 i; w" i0 ^ W
end6 I( E; H1 X! U$ j) t; s% s
可是运行时提示no such plot: "Totals"
5 Y5 J$ N3 a: O+ |$ ^error while observer running SET-CURRENT-PLOT
/ U* J7 ~4 ?8 _4 y: X called by procedure DO-PLOTS
5 \ g8 R; y% a0 {/ a! `) u called by procedure SETUP
5 F/ F& b) S, x called by 按钮 'setup'
4 w0 ]' g$ z. J+ X! F" ?求大神解答啊 |