我编的程序如下turtles-own [energy]
, c- k* w# H# {* |- S/ |to setup8 Q# U9 H4 d3 r; w% L* m9 t: E& O
clear-all6 x8 G b+ @- `
setup-patches+ M' \" X2 ]8 F
create-turtles 100" Q/ K- i3 I2 ^4 U( k7 M5 c
do-plots
( ]8 r, K9 k3 J) }, y6 \6 N ask turtles [ setxy random-xcor random-ycor ]
: Z1 |6 N1 a/ v0 d% g5 F( Tend
+ l: c2 a r: {# _9 e% m sto go! w2 O0 N1 r- x) ^0 J6 s
move-turtles
: f, Y! n% ~! w- _ eat-grass2 J' R, k( l) R8 O$ N) L9 N* `
reproduce7 I. O; n( l% Q4 `6 _3 w, x
check-death
9 _% H; C- s* n* k. p regrow-grass6 T5 j2 ~0 m# g
do-plots* o* l. G- M& w
end6 d* v$ s; k; V7 ]$ K
to move-turtles
" R |' P' D8 m" {+ y9 y0 K) [2 D ask turtles [/ D9 J, j" S" J6 ~
right random 3609 r- E. z' `& u0 y6 g2 X
forward 19 w' n* X7 R6 ?$ f- @
set energy energy - 1- L* F! @9 H" J; ]# w4 F" Y- G# K
]
! n1 b! t/ j. B5 V5 b" Y/ ~end' L+ Y: q' b) w% I7 @8 L
to setup-patches
9 U+ V9 D4 Y+ V% D; Q ask patches [ set pcolor green ]8 [% W) K) y$ r
end, D1 S( q0 j' k/ [: q$ L
to setup-turtles# g8 j. K: U/ G; A5 P
create-turtles 100
' V4 \) E1 s5 a+ k* c% c ask turtles [ setxy random-xcor random-ycor ]
2 {/ z9 m a( N$ f- V, dend3 ^" L' a; S4 @, E1 D1 y/ {
to eat-grass" y+ v4 M( a# y L2 X0 m0 M
ask turtles [
9 L, q# k1 \' @, |% A if pcolor = green [7 r3 g$ d& b/ ^$ B& n6 o
set pcolor black6 V/ I$ u& ` R4 D0 ?7 G- t
set energy (energy + 10)
, Z+ h3 c T/ C; F3 J$ r" C _ ]& i+ l( {" Z! X. |' @* m: H
ifelse show-energy?
# i2 _% Y j9 X0 r5 c b [ set label energy ]
% `! F, z: t; q. I; I7 \( p [ set label "" ]
) j& D5 r+ ^4 }7 o3 E6 U% m1 @ ]/ H. {8 w2 s( T9 h l8 I% G
end
* Z* ^9 x- J2 t& }to reproduce7 S- W8 K. p0 v1 o0 i0 U0 [
ask turtles [
9 B. {6 R F7 @5 n( p9 q if energy > 50 [
* t; l. X1 v- A/ z6 q set energy energy - 50
$ m+ r. v/ k4 W& V# s6 i3 ]# N hatch 1 [ set energy 50 ]9 [6 A: L3 p4 \: r# L$ P- w$ a
]
1 h- ]; I9 |! e" s. A7 V, b ]+ `- S) h4 _, s) w
end
0 u; @: ^9 I7 Qto check-death
2 P: v; W: [9 s: u1 G9 f D ask turtles [
6 o" y. j- k" h3 E; O* R9 p" ~ if energy <= 0 [ die ] s) ]: |7 {9 f0 E4 s
]
. |8 b6 C- W: X& [* c6 Vend
9 d% H) h1 w) X- J) V3 m7 {6 Qto regrow-grass( C* P) W' o5 J% C+ Z' F/ Y
ask patches [
: g4 o4 |0 a0 w$ G) |9 x if random 100 < 3 [ set pcolor green ]8 d) k* a7 b& N& r) P
]
2 A. y8 Q4 {8 i2 Z3 ]end3 W: g, v ?$ t# a+ Y% w) }" I
to do-plots% ~9 T9 Y6 K8 V. P/ W
set-current-plot "Totals"
$ }2 |! C: }' J% W% f: ? set-current-plot-pen "turtles"
( C2 q/ R+ {1 J plot count turtles
: K- F2 r' r' K2 Z6 W; [: W6 f set-current-plot-pen "grass"
2 v5 S# f. \ M# d plot count patches with [pcolor = green]7 Z! }: a) l7 k y; K
end
: J4 D, n" g3 o q可是运行时提示no such plot: "Totals"3 t& v6 B! t' x4 u: z3 {1 @
error while observer running SET-CURRENT-PLOT9 D& |, m5 ]2 K
called by procedure DO-PLOTS8 u! {/ A0 g, T
called by procedure SETUP
0 t* V( w$ {6 R8 T% u2 n called by 按钮 'setup'( T& l. r$ u) `9 f! x
求大神解答啊 |