我编的程序如下turtles-own [energy]
$ j% K: t9 o2 n! d u3 Yto setup9 H n6 g) Z, Y0 E' e$ b, \
clear-all
) g. c' t- F3 E4 W$ K) C setup-patches! v, p/ u1 H! c- P9 ` }5 ?
create-turtles 100
+ m: M. W3 U! p5 l" {# Q( \ do-plots5 I9 O' S" w% c+ k4 s9 T" S
ask turtles [ setxy random-xcor random-ycor ]
% D5 D% |# E1 b: \# Zend% Z8 n$ v3 [9 ?' q! m2 ]/ ^
to go
! F3 ^9 Z) V. B8 W f move-turtles
9 u" N: o' }$ X, E7 D( J3 C eat-grass3 [, {) X, W: r. t, ~2 h! }
reproduce
& w: \8 J7 \& r, c- ]4 U% O0 u check-death
0 D2 A* i. |5 H2 U2 P8 s regrow-grass) V# k* j z: V* W, M) ]
do-plots5 m D. Z) Y; z7 t
end
0 O0 ~4 m2 b8 E& i# ato move-turtles
2 A& j% ]- N3 s, g ask turtles [+ S: M, Q+ r2 i7 _' ^2 {) E
right random 3601 p2 _( Q6 j P7 ^3 J/ z v$ a
forward 1
3 g9 b2 `+ F# J set energy energy - 1
. c4 _& b0 S3 Z! F& s ]$ W3 c$ j. _) M$ ~0 Q: g
end
3 q0 ` N( j9 u$ s W' `1 nto setup-patches, q3 |# M! O+ n7 s* G9 i5 Q% N! h- f9 M
ask patches [ set pcolor green ]# L- ~% x7 x5 H% y) ?$ N
end
5 J7 M! }9 w: C2 e# w- Xto setup-turtles+ C" r! B6 _1 N, J7 f }. g: K
create-turtles 1009 T- W. @. J! q; A* v; d
ask turtles [ setxy random-xcor random-ycor ]8 d1 K8 e3 C+ j' M! u% p
end
+ u% ]/ ]; S1 o1 k, Y1 n# y* Mto eat-grass, m/ p" {# Q5 \6 u+ a# \9 i$ ]8 [
ask turtles [2 m5 O& M# k% |4 Z" {
if pcolor = green [
) m6 P; {! I' T/ v. [& K! v1 d R set pcolor black
; x; J/ N6 n# r& u% N2 }' B set energy (energy + 10)6 b8 I# E' E- c9 w+ b
]
r& e' v( A8 L7 K& t& R( {* @! X ifelse show-energy?
! @) W# i( Q, q& S. ] [ set label energy ]
6 _# @! Y# ?% [5 p% I [ set label "" ]3 D9 M' ?$ B! R+ X' C
]
" M6 N" N5 n: P; S- I Y" `end
L" {. ~0 C1 c7 E5 J& }2 zto reproduce! a5 l v2 }- ?1 S V
ask turtles [
8 _% b4 e( k1 u; `) _ if energy > 50 [9 Y$ D# j( z& D# F; b
set energy energy - 50! `* w0 s# `! _# Q: v
hatch 1 [ set energy 50 ]; e0 b( V! `8 N/ q/ e4 Y
]
' o7 U' R* l+ [% j1 k) }- _- B ]
. V; _! c" N2 T* K3 \5 Uend
0 n& J4 o0 T/ G) s, X, Jto check-death
/ G9 a& B4 o+ {) B; f9 u; @4 \7 X ask turtles [6 D4 y% X% Q, H% \
if energy <= 0 [ die ]
8 X0 ?' `+ Q$ Q" ~ ]2 z: p5 Q% }# ^5 w2 X, P$ \
end4 }, p; _1 f' g! W
to regrow-grass+ p D1 r1 P3 x9 {; N) K" ^
ask patches [
9 _0 M7 W; q2 w' i if random 100 < 3 [ set pcolor green ]8 c9 Q- ~: E: Z. a3 p+ l; Z) J- u' j
]6 K& m3 o' t7 r
end4 E7 l+ {( G% |" N$ g
to do-plots
; C$ l& }& W' Y3 L set-current-plot "Totals"% t4 d6 {4 y: j% y2 u
set-current-plot-pen "turtles"
: K0 I5 c. D0 |1 X M0 P8 J3 O plot count turtles7 \: F! l& L0 w* d+ `* p
set-current-plot-pen "grass" M! d/ s: ?3 s$ [4 t! Z
plot count patches with [pcolor = green]
% w0 t* I" V( O+ W, ~) ^7 yend L2 k- B* Z9 k; C
可是运行时提示no such plot: "Totals"* K- V7 i! j C1 i t$ O% i' q1 v
error while observer running SET-CURRENT-PLOT4 \* V0 s$ Z( M* r2 |' k
called by procedure DO-PLOTS" U0 k3 a( X" `' w
called by procedure SETUP
# Z3 e* u- C5 u$ { called by 按钮 'setup'
; h) ^+ t- L4 D5 g2 T求大神解答啊 |