我编的程序如下turtles-own [energy]2 s+ Z* d/ H9 u2 a
to setup5 l9 A- Q% e+ k
clear-all! A7 e4 x9 D1 P7 x
setup-patches
0 g2 o: V! J6 p% n create-turtles 100# d7 W: A6 L1 l$ N8 w
do-plots7 i8 ^. k: h$ u5 h
ask turtles [ setxy random-xcor random-ycor ]
: \4 l. z7 A# @8 x/ F$ Y% eend5 S; B+ l; x& P: q4 o5 o$ w
to go
$ e0 M5 Z$ _- B: I9 M4 a% D move-turtles
7 A( [1 s: ?, W/ A9 r# T7 ^$ g eat-grass
' F" I+ X- D0 w$ E" ^2 Q! S: F4 n2 b reproduce$ u5 n$ }; \( Q, ~# i5 i
check-death
7 `8 f8 F0 p% ]& d regrow-grass
3 M0 L, j3 A( X1 U; F7 L do-plots6 p7 i# A2 p; c; v
end9 }) I% {2 \0 A; I+ l
to move-turtles
5 a' h, K1 E i7 E ask turtles [
; f# i" j5 Y/ h( C4 |* x" _ right random 3601 t/ x/ ?/ r9 y1 }. K! b! Y
forward 1
/ l! x$ W- j1 `% v set energy energy - 1
& E1 a/ Q# r+ R o ]0 b, ~& F" L2 i- p9 y. R# F
end
/ [* Z+ S* L/ g# I5 M- Sto setup-patches
! ?& N+ _8 I3 K' H% { ask patches [ set pcolor green ]0 A j; o& Z+ x3 H- L# Q
end5 w! I, L( r q$ P0 g6 e f6 G- \
to setup-turtles8 h' s' M- | u
create-turtles 1008 g0 }6 c" d8 J# w8 J
ask turtles [ setxy random-xcor random-ycor ]
7 @' T5 p# M) S, i3 \8 _3 tend
& v; Y6 D# ?" e( Nto eat-grass1 S& ]) i: ]2 g4 X2 ]+ [1 h
ask turtles [* e ^2 S# B& [3 q3 x) J
if pcolor = green [
1 |5 J4 t; _) v' n- r set pcolor black
# N0 H( g: |7 |) }) C set energy (energy + 10)# u( ]! W& ]( Q& |% u
]. [* l* @$ E1 {# X
ifelse show-energy?' H9 g9 \2 _2 P r9 A
[ set label energy ]1 {) C8 \: y1 J* Q+ j+ b
[ set label "" ]* E3 r/ ?) `! {$ S. b* R' u
]* _; C) f9 e7 ~
end
( c0 H+ P/ y. K6 k8 G; E6 n; Zto reproduce
; G' f# E1 U/ x- k" p# Z- A ask turtles [% W$ H$ v) |9 E% K( V! R
if energy > 50 [/ J2 O% ?0 |5 e0 ^- f+ t
set energy energy - 506 {$ c: X$ ~% y: S( h* i
hatch 1 [ set energy 50 ]
k" F8 o, x( E8 ]5 C( Z ]& A/ G; s' Y2 K; v
]
( b2 K- D! p4 eend. O9 j4 j5 G8 }( i6 d
to check-death
4 u6 T. S+ U' w; ` ask turtles [
- ^: P3 i6 n. v" B# D if energy <= 0 [ die ]
j u \, u u4 G6 R% n ]
1 B8 w; q& M y, _0 f; ]end
7 V) ]9 U( t6 M5 t* n* k0 d7 Cto regrow-grass
6 X, r3 P7 a% R, `" t ask patches [" d8 {$ g7 Q4 M6 a3 j+ h6 L% ^+ J) r
if random 100 < 3 [ set pcolor green ]
, E( y- }4 \% s8 o) w$ I3 r- e( }$ C ]
% {/ r% K Q6 v% n' nend
6 n2 m& }$ \$ ?& i& _/ ^+ Bto do-plots
: R7 d4 a% q) |; I. p7 h' m set-current-plot "Totals"
C) U$ N- o6 ^ set-current-plot-pen "turtles"# x: K& l( g/ T$ m7 R
plot count turtles
% b9 ?/ U- [2 `- Y9 Q5 ]( x' V% ~ set-current-plot-pen "grass"
: l1 [, V+ T$ x/ e* \4 r& S plot count patches with [pcolor = green]
) v' N+ J: N- ?$ Y1 k, U+ a7 S7 qend, ^2 j! [. e+ Y) G6 O& i! I
可是运行时提示no such plot: "Totals"
; }0 \$ q/ ^9 Y1 Perror while observer running SET-CURRENT-PLOT0 \/ B# V# P0 q1 t
called by procedure DO-PLOTS9 s: K% u! w+ f P c
called by procedure SETUP/ f0 x( E. ^- z% E9 t7 S
called by 按钮 'setup'
5 v+ Y. M$ J$ p, q ~+ D4 _ L" S求大神解答啊 |