我编的程序如下turtles-own [energy]6 r. L0 d0 n+ }. K: @* i
to setup4 s" ^, T& ?5 t9 i. x, n
clear-all
; _$ ~& O# v8 o+ o/ Y/ ^ setup-patches' ^1 @7 u, e- u2 X; _
create-turtles 100! _4 |! y8 s/ F: _ R1 K
do-plots# \0 q& s+ h7 {8 i; v( w
ask turtles [ setxy random-xcor random-ycor ]7 c# t- J- b) V0 A: U
end: t8 j. h) U. b# O
to go" z/ b* l2 X6 C7 n. j6 k
move-turtles0 S. q' T- t0 [8 `( p+ n2 v! F( v! k
eat-grass, N* r2 v8 L n% Z9 u/ \8 d
reproduce
1 l" V0 d1 u" O3 n, n* t7 g3 x check-death+ V# ?9 y) D( w6 B
regrow-grass
. j! [# Z. P% s% f% a& D- Z! d do-plots: C) |+ k/ L N: y6 X( r( E
end
- O6 N# A2 Z, sto move-turtles
! `- r) _) B' [3 Z ask turtles [
8 h) Q+ E) T& c2 M$ i right random 360
8 a/ X2 x( P+ g* i0 b4 k+ W: V forward 1
& a/ ]) n) s. Z9 z6 Y set energy energy - 18 h% W% I# g$ D% O J9 K1 V% D# [
]
, n! B! W/ f/ M1 d7 E9 Fend
* z% R/ H: q% i" e+ C% }9 Pto setup-patches. U+ o, N# y) t/ P. w, N
ask patches [ set pcolor green ]
: h- }' d) s9 @# fend
5 U; y+ J: r2 _+ Nto setup-turtles
. Y# s8 h! y$ W+ j# Q: `7 c0 i create-turtles 100% y5 ~3 J1 l* f# j& c( z+ G
ask turtles [ setxy random-xcor random-ycor ]
- n. D' z: g/ V% K7 O6 ]4 ^end
! B; c2 X; W M: E6 p! F jto eat-grass
7 P3 U' @1 V2 C8 M ask turtles [
( \1 {9 z q3 v+ W+ a if pcolor = green [
3 ?8 V2 K+ |% }% J" f: a' a$ U set pcolor black, v i9 N) H) }1 \8 G- p. W: f h
set energy (energy + 10): H. E9 L" b: ~ z: Q/ C3 Y% O
]% `- b: [5 }2 e/ t4 b
ifelse show-energy?
" _/ Z$ }7 @3 f2 r- J- D [ set label energy ]' K" l: k! e! p
[ set label "" ]7 O( \- |, O" r/ ?5 C0 K Z! Z9 R
]
) I$ H, u0 o, iend! k7 K3 }2 A& u3 W
to reproduce U: F4 I# ~% h+ {( v8 V* L
ask turtles [$ M8 y' n i2 A1 [ P: y
if energy > 50 [6 o, |9 ]' m) Q7 {4 {) g# s% f
set energy energy - 50
* ]9 M3 k* L: K+ f hatch 1 [ set energy 50 ]) e- s1 ^ V) r3 R- \. \, ?
]
" ~5 I+ j7 Q$ t' w ]
% P+ }7 W9 x" m! t! `4 Jend
6 F0 p. ?2 f a! L. Bto check-death. |: N: [' n7 u, c
ask turtles [3 D6 J! j! I: _. r
if energy <= 0 [ die ]
- ^5 G% h* S6 l8 L ]# ^* o# A$ I+ ~) g7 ^& Z i4 y
end
& t# k9 G6 J4 e& M# J& E, z4 R* yto regrow-grass& j Q i5 B1 T* ~8 x
ask patches [6 D" @8 U( e4 m
if random 100 < 3 [ set pcolor green ]
6 [) p' [' }/ x& z ]& g8 B3 F- w7 m% j# j4 d6 y
end9 R) q: h1 m, u' Z" E
to do-plots9 Q/ n+ s O0 p" g0 `% D7 A! j# x
set-current-plot "Totals"
( H! R' c& o. g% H6 M a' y set-current-plot-pen "turtles"; |- D& E% M, c. P9 M. H: f7 S
plot count turtles
% B% T$ r, Q. L; W set-current-plot-pen "grass"
9 A B( b: j& S plot count patches with [pcolor = green]
- @7 p0 |/ W$ p: ?7 m" s1 _* {& k- Jend$ v% a: R `. K$ w! m, Z( N1 z
可是运行时提示no such plot: "Totals"
% p, ]/ h0 Z0 I- u+ r: s: terror while observer running SET-CURRENT-PLOT
: L. t Y: j$ e& ]8 A; y called by procedure DO-PLOTS) @' z3 F& L/ M" K! B' T
called by procedure SETUP
. X# A6 Y( @# Y called by 按钮 'setup'
# {4 u: r J& K5 v& _求大神解答啊 |