我编的程序如下turtles-own [energy]
* Z; Z5 F; V* T" Z; p4 Uto setup' V8 {, f: P: m3 m! E5 a# s- w. [0 k
clear-all+ M: ^: ?* K% a; s3 U- H
setup-patches
: n4 B! C7 A3 G( c create-turtles 100
r0 R$ P; V2 ^$ e do-plots
" b# k4 q7 g$ r% v ask turtles [ setxy random-xcor random-ycor ] _" ^- b/ `, ]/ e# z% T& h
end
* \1 i' e' p/ c; ~1 K# Yto go* r" n a H2 t. {
move-turtles5 R% `" n" ]9 R3 O4 e" @! ?3 L. m
eat-grass
$ P0 l+ Y, A X& k reproduce
! b! a) M: r" X" i1 H$ t4 f9 ] check-death
5 y! \5 N" K, ]2 Q3 \$ t7 \ regrow-grass
7 ?; D" B, d$ S/ C3 N do-plots4 t' _* a. a( B% D( N1 X
end
9 F& P8 k4 [7 n. }to move-turtles
, f# v; {- e6 K. W" E- Z ask turtles [
* m5 n; K: e0 k8 ~; } right random 360
! }$ p9 q! b! b forward 1
+ D- ?2 A: O9 W set energy energy - 13 A9 Q" c5 O+ ]7 M* \8 z
]
2 p& ^+ l( F! o. ~" aend
$ R2 f3 y& V! S" b. k ?9 @to setup-patches
. y0 O" h3 c; F3 W/ { ask patches [ set pcolor green ]* k) z* q% t' J2 D
end
% I/ {: a8 k- G1 m r$ I5 eto setup-turtles
3 S- D6 p% M$ F8 v. E create-turtles 100
5 C& z! ]7 ^1 ]9 E% X) e" i4 D ask turtles [ setxy random-xcor random-ycor ]- }2 m. Y( X" Z* ^
end
' F0 q7 }4 T O" ^) c2 Uto eat-grass
: M. n$ `8 L8 n# {! A ask turtles [1 r z Q' ?' V( e& h# m
if pcolor = green [
% y2 `% k1 `2 E( Z# v4 [ set pcolor black2 a: Y/ m" `& n+ C2 P/ v
set energy (energy + 10)
# W9 ^! S5 B2 e4 Y ]
: _- }/ h/ L1 r* k! e+ z. l% t ifelse show-energy?
* J6 ~6 m7 {. O3 L [ set label energy ]
& z* e- Z. T8 ^! Q; w$ g) B9 p [ set label "" ]4 W2 D) ?- x! J
]1 R1 B. m( u7 w8 H I
end; f! r8 Z4 u- f, {
to reproduce
3 a0 Q1 f' M- X- P" x. }( c9 v ask turtles [
6 g& q5 G" I2 D if energy > 50 [& Z5 n8 b3 A1 Z `% q% V/ P9 w3 A
set energy energy - 50- T! S$ |9 _# L
hatch 1 [ set energy 50 ]$ p) i/ N+ F8 ]" Q
]
7 t$ G" l& A$ B* v6 i( B ]
# p1 Z( d& G; ?. fend
0 \) C0 b% \- E' N; M: Zto check-death
; c! X$ \ ~7 y9 e2 i- x% ~) o! } ask turtles [3 \& \7 J T* }+ t* O5 k0 a" o
if energy <= 0 [ die ]
5 `- B! H8 ]* ^ J ]% K4 k, e, z( J: E4 K
end" M4 V0 n7 I& [1 @
to regrow-grass' {1 q! Y# w A3 p; ?
ask patches [
6 T. Z+ H& t1 ^( [ if random 100 < 3 [ set pcolor green ]
/ X7 g9 B, O: d' H ]# p, m# B+ T& ~/ [7 t
end. n) C' u9 [! _. i4 i: ]+ K3 N* X/ L, D
to do-plots
& L# p" l F* k9 O& v1 U set-current-plot "Totals"
" u) l& f8 b/ d3 E+ L3 Z, N set-current-plot-pen "turtles"
. f" J; P& K% q6 ? plot count turtles. v1 G4 j$ f( u2 d
set-current-plot-pen "grass"
# l5 ^/ B# y) I* k2 T% n0 D+ q7 {2 G plot count patches with [pcolor = green]
8 d' s, _$ X3 C( `& [" aend
* ^: b2 G% d$ d$ s可是运行时提示no such plot: "Totals"
% Q, I% I* p( o V5 zerror while observer running SET-CURRENT-PLOT) y# O$ R% ~+ p' ]2 ^! h2 I" n( m
called by procedure DO-PLOTS. T3 R) Y( }1 d r
called by procedure SETUP
- N& t2 h: x/ X# b* a. b called by 按钮 'setup'
3 {. k6 k. T7 x0 ^) ^7 p: I% D4 x求大神解答啊 |