我编的程序如下turtles-own [energy]
( x- w. @( M6 \7 @* @9 zto setup
D; f0 X3 z" d clear-all
: P# T( [2 t; Y6 u* l F setup-patches) I; t/ _' u* t. ?7 B8 k' ]# B, H
create-turtles 1001 W7 g/ L* c) J! K+ V( _3 E
do-plots5 A% p" }3 m9 ~" [
ask turtles [ setxy random-xcor random-ycor ]
3 h6 ~2 ]+ s7 m) ~end
6 ^# l1 l& ?: Z Q) R' Q5 Jto go
0 T% i6 d% c2 u4 p" M move-turtles5 X/ R( Z5 G" q+ ^4 n7 t
eat-grass
% l0 h3 }9 }7 h reproduce
/ Y7 H$ J+ _1 h6 H check-death2 `: [! R' I6 z, S6 I! I
regrow-grass- b+ z9 L7 N8 y$ _9 C
do-plots
* C2 U8 O& C- F! D$ z: `end
2 p; |/ e5 U/ o, pto move-turtles4 U4 S- \8 Z0 O6 c' w
ask turtles [9 Z' A8 A( f5 z( ?* G
right random 3601 U' [& L4 d. W0 L" t
forward 1( }" o) w4 j9 w; V
set energy energy - 1, ^2 e+ c' k& Q2 I+ x) {
]
" g/ S" c+ c6 ?1 o8 X8 G% Nend g7 X9 r! }0 P/ p, r) r4 U$ L9 I
to setup-patches
* {' i- v# u# i& c7 ~ ask patches [ set pcolor green ]
- m2 \1 g1 i2 I; o( U$ _end
* Y d5 E, E- U) B+ Dto setup-turtles
1 T- y+ X+ d/ r# k5 j4 C( h create-turtles 100# m$ u' ^- F I" r
ask turtles [ setxy random-xcor random-ycor ]3 ] d0 q6 f9 p* ?& Q
end
/ N+ q7 ^# i! E9 w6 P; Z. \ mto eat-grass
; z# Y; g( N% v2 m4 K# O& ?* [ ask turtles [( x3 P# L8 H- U9 J( {
if pcolor = green [
( O8 E1 n7 e1 Q2 [ set pcolor black
* V- Q& w; ?2 f( L# `, ~ e) D& M: O set energy (energy + 10)
5 B' I! f* {, J/ B ]9 @+ _" t* O7 W$ T8 G/ A
ifelse show-energy?
. \* W1 A$ Q$ w; P1 M2 _ [ set label energy ]% x1 e Q" W- ^# ~
[ set label "" ]% ^& p( n2 s) q1 o: x
]
4 a8 d3 ?3 ` A; gend- t: C& J: u4 d d
to reproduce
' C2 W+ D2 U1 f ask turtles [
5 r( d8 [" w6 B6 ?" _8 H/ q+ f' o2 d* E if energy > 50 [$ `+ M: q2 ?2 ]
set energy energy - 50
6 a. V. @6 F+ B, Y3 C6 x hatch 1 [ set energy 50 ]
# B: r4 ]% D7 Z! w ]0 J( @3 V9 f3 _# b% X* V) D. R: E4 O
]
6 s- y9 A8 V4 m; N4 \, Vend
' z6 V x, F2 Xto check-death
, e3 Y; ~: A/ R0 ? O ask turtles [
: Z# F! F" ^" T/ B if energy <= 0 [ die ]' C- L/ H8 N( D: B$ _3 W
]
$ S6 b4 r. @8 nend" e0 n9 j' U. |" E% C% v7 T
to regrow-grass
- ]! B2 b4 R* P6 C' u# U% j: r h ask patches [+ Q% ?) @9 h+ P% ~
if random 100 < 3 [ set pcolor green ]: y6 ~: s) I) I
]! _, a' e! ~# }& i' B9 X
end
: x! k% c2 I" a r+ Vto do-plots" }2 m/ q9 g' ?/ I: I
set-current-plot "Totals"
$ b/ ]; Z7 ~4 _+ z) L: d set-current-plot-pen "turtles" z9 T; K% Z- H' x+ @
plot count turtles
4 ?1 {, A2 w( y7 w# v& H9 P set-current-plot-pen "grass"9 y/ }% X, B) E* N
plot count patches with [pcolor = green]
8 S$ i7 Y/ ?% s" w3 hend
; {- y3 S9 W+ d: z3 o. q可是运行时提示no such plot: "Totals"9 @# V' t, I# F* v" ^
error while observer running SET-CURRENT-PLOT9 H: T% f) x6 l! b! ^
called by procedure DO-PLOTS( j% f6 c; u$ |: f) {
called by procedure SETUP
" v t2 k' }4 N ?" a called by 按钮 'setup'
* x( `+ }6 X/ Y& t: q: u3 x求大神解答啊 |