我编的程序如下turtles-own [energy]
% Z$ n2 a' [3 z' ]& nto setup
+ p Y! F5 A2 a4 O7 ~ clear-all4 ?( g# a, ^' G, k8 d' Z
setup-patches/ U# E5 l" l1 ]: \% `9 E) m% T: x* p. ~
create-turtles 100
5 _4 _6 x( |9 w6 _ do-plots
( _+ t/ G1 j# S7 S3 V' U ask turtles [ setxy random-xcor random-ycor ]& C9 C- @; s* u) Y c# e$ W/ W- n
end% T" }+ ?, g( ^( b& Z' R* h
to go% T0 s* `4 p# g/ W+ k
move-turtles1 S3 t, u& V: Z% O9 a; a
eat-grass. Z0 w# Q" _0 P8 T9 F* h
reproduce$ ~- H* G! Y# }6 D# a. F( o
check-death
# C+ w) U$ J/ L% h( D( p regrow-grass9 |) c, O% a( z
do-plots$ L# I& C2 t. C9 q+ \; |
end
' D; O, V) R! X* B% t/ D( hto move-turtles
& W- T* D$ @) c* z) t ask turtles [
2 [$ ~% H7 J- {5 x; k `6 Y. H right random 360
, _; h1 A! P; n0 T( M# @+ D forward 1
. c3 P9 {; C* u% f/ I! h set energy energy - 1; I& A! U0 ?* z: `; W
]
9 y$ ~8 i5 x8 Y( k( }4 y) _end
- ^5 H6 W5 y6 H# l5 mto setup-patches
/ A* }6 W" M" {# Q. I ask patches [ set pcolor green ]6 Y. l. b! u$ L. J* k1 G2 y
end+ S% p7 Q0 D; T" R. ]! a
to setup-turtles( m/ o; n5 x9 l% Y4 @1 r
create-turtles 100- E, j8 X" Q* P$ ?
ask turtles [ setxy random-xcor random-ycor ]6 R) ^" ^$ x% H e+ h
end
# ^$ B& n+ y8 E( Q% N5 }: Jto eat-grass
* C( T% e8 z1 T+ l, m: L6 l* } ask turtles [
+ s) ] M& \8 T+ u. O if pcolor = green [
7 ^% I6 V" F* U/ W3 W+ ^ set pcolor black& n, f, N2 ^* c$ E- |
set energy (energy + 10)6 W! g( J+ H: X, M" C
]9 f4 f- _& ~& J* ^
ifelse show-energy?
. X# ~2 ]" Q Z [ set label energy ]
. S# _3 o+ E {2 _0 m [ set label "" ]
! d6 w% O, l' K) U- D0 I ]9 Y/ H- A0 K% p1 a. G% t# `
end
o$ k1 [7 {6 h H& y' Z, h; ]to reproduce- C/ Q) P/ \& D4 c( I* L
ask turtles [
$ d9 r! L7 I- q5 n( H, n if energy > 50 [
9 w- g( w& I( R, P set energy energy - 50
# r$ m0 V. i- f hatch 1 [ set energy 50 ]
: n$ x0 s% x* B% I& v4 k. N2 V ]- P! q/ D8 s, U5 l: @( a$ {
]
6 l8 {) I9 Y, l3 Gend
3 D% G' N$ i1 Q& cto check-death! W0 n' A/ J9 h9 C4 C, l
ask turtles [6 M1 S6 r. p' Z C$ [
if energy <= 0 [ die ]: [3 F. L8 Q! t) Y# q; R
]
; E* H6 y7 Z. s8 F0 zend. D2 V( C- W5 Q# Y$ Q, u) n
to regrow-grass
. @* L, {( b& i2 A* _: K' h ask patches [
, P3 D1 w; y0 r( H4 W if random 100 < 3 [ set pcolor green ]
4 s, _& M' I, D: q, q ]
& ]0 j4 G' V+ f" k+ tend
. L, v2 ?7 d( H; S% r6 Z/ [3 l, ~to do-plots
' K# a& v: G5 \ set-current-plot "Totals"
# a3 P$ \$ a- z9 {; g! l2 u7 W set-current-plot-pen "turtles"
, w& m' g5 M$ T! U' r: t plot count turtles- C W3 k S. V3 c7 V) n
set-current-plot-pen "grass"" z5 ?$ |8 Z w
plot count patches with [pcolor = green]0 ^' v% W# _! S+ {2 {4 k x2 ~
end
9 d2 o2 W ~- u: x* H" o可是运行时提示no such plot: "Totals", Z6 ~1 j, \1 A8 t! i: C W. ?4 y- d
error while observer running SET-CURRENT-PLOT: v) R- ~6 P% ^; l. A; T
called by procedure DO-PLOTS8 ~/ W! O8 Q9 ~: W; P; b3 Z- Y
called by procedure SETUP5 z. J& Y! e7 G9 j- N
called by 按钮 'setup'
$ Q2 I2 y3 M2 ^求大神解答啊 |