我编的程序如下turtles-own [energy]8 E$ _% U C, a
to setup1 n& w1 `$ W; t! u$ y( Q2 q
clear-all
* K- b2 g: X/ x5 _ setup-patches4 o2 u4 C9 A' ^$ X8 e, L1 d
create-turtles 100
9 E E" E' W. N' ~ x) L3 C do-plots% q; ~# W4 @- |/ ~# }
ask turtles [ setxy random-xcor random-ycor ]" z9 M. f( K0 {" H
end
- F: J. ^" m% b; F ]/ x/ F: Zto go
: U P, M# g6 k. ]0 M. j1 t move-turtles, g$ A1 |# ? O: r2 {4 e
eat-grass
. |+ r! _9 J/ s& I) h+ _ reproduce* R' R6 s+ T4 P# \: F: i
check-death
* Z% j; x- H7 | regrow-grass
7 _8 |" K" J, y' e do-plots1 f5 ?1 t: C: U2 H2 V v9 B
end
; Z. u: V" i b! c! `8 D; Dto move-turtles% l$ V. M, K4 ?& u
ask turtles [
) J( M4 r/ _% p right random 360
0 z! ~$ F, v# I# L# Y' Q forward 17 W0 ~* W4 t5 i# e" [
set energy energy - 1/ h" k7 U1 v7 @1 w* _) J
]6 L T1 V% L( _$ }, U" Z4 w
end6 d) c2 @: u2 k- {5 g0 G. p; L
to setup-patches
' q/ M( ?& X! u& j1 F! A/ H$ R) H9 w ask patches [ set pcolor green ]
5 X+ Q' C0 e2 v' l6 z' W) m6 Iend
; O p( z6 j$ l. ?8 _4 oto setup-turtles
1 B& b& ~6 U0 I3 D* [ create-turtles 1004 b6 U8 Z" B- w1 {. t
ask turtles [ setxy random-xcor random-ycor ]9 b5 d# h+ `! V$ l
end- O9 _% [8 f. a! P) y' T. i/ W
to eat-grass
: f0 e; N% F/ c ask turtles [
3 c+ T$ l0 c h if pcolor = green [
1 c/ v; Y3 c+ K3 h2 W set pcolor black
* m0 G l1 e: _6 q I# ^# u set energy (energy + 10) y' N- c& o4 M# `
]
7 H; G ], D( m1 W ifelse show-energy?' O$ v7 k. w! V! ~4 \/ Q3 [0 C
[ set label energy ]
4 {& W' f0 ~( B6 u: T% A [ set label "" ]
6 [7 U4 D( v& Q- g" f ]
3 t; [4 z. w3 J4 q: k; T9 l5 fend: ~! t/ e3 S/ ?! | v# y3 s
to reproduce
9 A5 o, Z( _1 H8 c/ W# ^ ask turtles [
5 x; F+ V. W6 A S if energy > 50 [ @7 g; f' `5 v4 S4 U; W
set energy energy - 50
% A M! j8 Z- _ hatch 1 [ set energy 50 ]
( \9 x, O/ n' f: |, v' K" l+ N ]1 Q$ B% |2 g$ @# J7 B! z% K Q
]5 K1 C; ^$ L) {3 P6 } L* `
end6 X: p% F$ X# i3 i- L
to check-death
5 g- Q4 n+ q/ O j, G+ q ask turtles [
0 B) a1 y; ~' e( L0 B! G" W) } if energy <= 0 [ die ]
9 z2 ~1 s n5 j& S" ]% m9 G9 L9 G ]2 k/ ~% N- x, y1 V
end
, p% T! x7 I8 g" c2 Jto regrow-grass% x* ~ _! v% q2 ^3 v) {
ask patches [7 J7 h# f- r; Y) o) U; Q
if random 100 < 3 [ set pcolor green ]- p% u; c! s5 Q! S4 V) }; L3 U
], H) a, X& g( t& L5 a7 G
end5 p- Q5 O5 ?- _1 U
to do-plots
: k8 O' S& o) S, A2 r8 M, @ set-current-plot "Totals"' k# v0 J: |: T0 D. d. M0 ^6 ]
set-current-plot-pen "turtles"
5 w) a1 X& G; E& U& f6 K* u: M plot count turtles0 N/ z' j' h% J
set-current-plot-pen "grass"
4 g6 Z6 W4 N9 G; }, c2 L plot count patches with [pcolor = green]
1 [6 E) p [( _& \end
" F6 n& `& a$ N z! X可是运行时提示no such plot: "Totals"2 v% r7 T7 S. ^1 Y9 ]* ?3 B3 o
error while observer running SET-CURRENT-PLOT
% `6 n' }, T3 g4 D/ L called by procedure DO-PLOTS
; R/ ^) N& D5 A% r7 r: x* R called by procedure SETUP- a+ z' P' \, u; r7 |3 m3 y8 _
called by 按钮 'setup'
: F* h3 w- s1 B6 z' W# W- l& u求大神解答啊 |