我编的程序如下turtles-own [energy]
$ M+ f9 H: g( {: ]to setup! r4 {' N7 K, q* c( R
clear-all
! M5 V( Q; j1 q$ \0 v setup-patches
$ s: r9 ]4 R3 j) d1 A) N create-turtles 1007 H% ^, O/ E. V6 o0 A
do-plots) Q- X o( L+ B' C8 O$ O$ M
ask turtles [ setxy random-xcor random-ycor ]0 p8 X/ Q& G5 T& }7 z. ^
end$ I: Z% M% z0 x# P+ ?
to go* _, l% v, g; B: p) y9 e6 Z6 v
move-turtles
( Y) r5 w' R9 i- Z& \' v* s eat-grass3 z; _" d6 [' x2 Y8 J0 d
reproduce
, |! Y5 p! Y% {) R( a4 }; [ check-death
: _5 k3 o6 T8 t& |9 {' t regrow-grass! J. k, s5 \6 r* E
do-plots5 K( r# F$ d; H
end
) i4 [1 X) a8 x5 j! jto move-turtles8 d& O z( c/ A6 b1 _" a
ask turtles [
1 Y9 @' Q: P/ o# ], l. @' ] right random 360
* X1 J( F, V: k- y, g- I4 L forward 1
' t6 v& Z7 w9 i5 M7 m: O. p. i) K set energy energy - 1. |& p+ I i }$ t" U
]
7 ~7 Y4 Q5 G3 e( d2 }8 Z8 P9 oend
4 m- {" J6 A7 V# dto setup-patches! s/ A6 |6 d, G
ask patches [ set pcolor green ]& q( V9 L5 y R) |
end
+ n, R2 }) T" w6 Jto setup-turtles
0 I- ?/ Q+ b( Q2 f create-turtles 100& _7 i6 x: u" O, Y( T+ L6 m( n5 F
ask turtles [ setxy random-xcor random-ycor ]& H M( l+ N0 q% j0 R* `
end7 L" g2 Z/ L: ], V. o8 W8 ^
to eat-grass3 p/ [+ [8 s. v" P9 z
ask turtles [/ \6 v4 C! g+ E1 f+ y- s# k" u
if pcolor = green [9 ^- N+ _. {5 X2 V' S& T% v
set pcolor black6 V4 ]3 K$ m% a' [
set energy (energy + 10)" ]2 O/ w4 D x* q3 a- A
]& R8 f. t% a8 {6 \4 |
ifelse show-energy?3 M+ o* y' g6 l. }; B
[ set label energy ]
. }* b9 X! n8 Z( u [ set label "" ]
7 P6 d% U; s0 k0 a- \7 D | ]2 w6 K6 ?1 b7 `! ]0 H
end2 j: ^1 W# g- n9 L
to reproduce; N+ m- ^# C/ [0 g7 H! i' k7 A
ask turtles [
& z6 F; M6 V$ P6 T) ?0 V/ J, Y if energy > 50 [2 F; K U$ N0 u8 ]6 {7 P' t& ?# I
set energy energy - 505 r3 W: }7 @2 k! a$ `
hatch 1 [ set energy 50 ]
! I: t# s2 F* V0 L5 P" j# E ]
8 z: C' M B: } ]
- m6 d4 W6 f: A' N ]) h: A6 S7 qend+ ?* ?# I4 `$ U6 f
to check-death
4 p6 O: e# r9 h4 r( K ask turtles [
* e" h7 j7 I# j; z, ?$ l if energy <= 0 [ die ]5 `. k8 F# N$ q/ I! ^( X
]
( L4 G' m( p6 s) x4 H3 Wend
# G8 c0 C4 c/ G8 b1 L' `to regrow-grass
+ f) @9 ^2 q' a5 l5 I- e ask patches [
! @; }5 q2 V. G4 { o. b7 G7 u if random 100 < 3 [ set pcolor green ]
# L7 a2 B7 w% X/ ?7 ?; f ]' p3 O3 Q t4 |9 M! s3 C- Y
end
3 v9 e" a/ M% p" H1 j" mto do-plots/ X x; P) a$ ^4 K1 l5 F, \# _
set-current-plot "Totals"
% y4 _$ ]5 ]! {+ ^) _9 B: d! ^ set-current-plot-pen "turtles"
; i% H& _) K% Y4 e plot count turtles
6 x! ^5 n6 Z; T3 B6 Z set-current-plot-pen "grass"
2 n* \3 R! h6 ?" B. \! T1 _3 O2 b3 o plot count patches with [pcolor = green]$ }- _& ^6 B% G* x; F7 F
end
3 F1 ^2 y3 x- {/ ~% a可是运行时提示no such plot: "Totals"
$ v2 A+ R- W. i1 U6 B$ _) E: berror while observer running SET-CURRENT-PLOT
* z% a; K; Z; ? {& C4 \$ A called by procedure DO-PLOTS
/ c; s) R% n$ }4 \( A called by procedure SETUP
0 q# b3 x* ]6 f% i called by 按钮 'setup'+ o: {; t% V: c
求大神解答啊 |