我编的程序如下turtles-own [energy]5 Q* H& }2 w; b' }9 ^& k
to setup, n) A: K" X$ w/ E" G
clear-all
% Z+ U, [5 W1 a2 s setup-patches
0 F/ }! `2 e# x& g create-turtles 1006 |& ^* t. t+ G
do-plots* A6 \8 W' E3 P/ e$ s4 c# I" E
ask turtles [ setxy random-xcor random-ycor ]8 D9 V" k( q- P: T9 H
end
# H# _ l; y+ ?$ U0 X/ D, ?8 xto go0 J4 D! J2 C4 e* y
move-turtles2 }7 i1 _+ r7 d' H4 `, c5 m
eat-grass4 E9 L( i+ E9 V; p/ q
reproduce
. ?: M' ]8 x2 y. G0 J5 v check-death
/ V# B; s. R0 z+ m regrow-grass
4 W `8 R4 z: P" U( W1 k do-plots; F8 a- \( K5 j- q7 O. o
end
c7 e1 L1 s; ~to move-turtles4 Z; `+ B/ I. G- i" e: ]# l
ask turtles [. b- h* f, V: M" z9 e1 j6 K5 \! L3 _
right random 360) l# A5 e9 V' S. j# O
forward 16 Y6 [5 H1 v! M% t% G
set energy energy - 1
, _" e8 {" M' { Q ]" M' u p* D/ `3 y9 s$ C
end" L& B. [! m6 C0 ~4 Q v
to setup-patches. @3 g! T2 K- a7 v
ask patches [ set pcolor green ]
; N; b+ J4 {4 }end
% Z+ }+ O1 ^/ _) C0 H; Y8 lto setup-turtles3 V% b& j. R" U4 y. {7 g, V7 K8 S" ]
create-turtles 100, {3 H; O2 I: i+ A. F1 v$ m& d/ ?
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass8 c( D* O# m7 }9 ]( i. n
ask turtles [, u- a5 o8 n8 @6 V5 p8 G
if pcolor = green [
+ c$ u2 U `! Y set pcolor black
! Z0 D5 D. i) w7 }9 [) J set energy (energy + 10)% e; U7 C6 h0 D
]9 p. Z( U F* k
ifelse show-energy?
- e1 s* \& R9 d% m3 J [ set label energy ]( ~# Q6 [5 k* _0 d. h6 F$ l5 M8 i
[ set label "" ]! o. o0 {6 E2 m$ ]: S& `
]+ C9 P u+ I' y
end+ Y' E2 a& P% I. K
to reproduce0 V5 ]3 D# H0 G- U# ]2 O
ask turtles [4 H/ s+ r' ~ x7 ?' H% _
if energy > 50 [" a4 o: R/ |) N g7 ?" L) u
set energy energy - 503 q g7 }1 F* c! ]* r4 j
hatch 1 [ set energy 50 ]+ @" L H# [1 G2 O
]8 G7 a5 S, N$ C( w2 D! X% T( s
]
! z8 n5 f9 v6 q5 ]" M9 Iend# x# D- z7 u1 Q7 D; d
to check-death
0 Q3 s* f% T# V! Y1 H; N! c ask turtles [* n: ]& l7 ^+ Q% f
if energy <= 0 [ die ]6 W& e' Y5 \# f% T; p' e- `8 t9 {, g
]/ P% d: T" d! m% V, P& Z
end
8 ~3 Z! x0 o; w# l6 Bto regrow-grass
" m" P Q( @5 r) K; f9 j0 Y# C W ask patches [% z# i8 h' n3 [& {8 O- Y% H6 i
if random 100 < 3 [ set pcolor green ]
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end# f: s9 p c1 j1 m% ^) q2 A- v" G
to do-plots
- Q! z8 E1 N9 w* A, F( {9 Z( U4 l3 w- b set-current-plot "Totals"6 }8 {* {+ @2 ]: l; b9 l* e8 }& v
set-current-plot-pen "turtles"
* z! s+ z# ?% D. j* N+ c4 x& j plot count turtles2 ?$ g( S3 q# j) g, b
set-current-plot-pen "grass"6 V I6 P* l9 _2 M( N/ \
plot count patches with [pcolor = green]' K" t2 E3 _: O R1 y- q+ T, x, D; n- _
end5 f$ u, \8 A- v
可是运行时提示no such plot: "Totals"* @' e1 h" j/ Q, Q
error while observer running SET-CURRENT-PLOT
- s9 I7 C' q3 j" [, Q' d# v called by procedure DO-PLOTS$ B+ X) s. _& [. \0 d
called by procedure SETUP3 P0 j7 N: n8 _8 ^- |& P9 r; K: }) }
called by 按钮 'setup'8 K; {+ N9 ]4 e, z7 u+ @' C! z
求大神解答啊 |