我编的程序如下turtles-own [energy]+ a6 Y4 [3 f/ n/ Z, I7 M1 k
to setup
5 p5 C4 O; J! _ clear-all. X- x. \% y7 y
setup-patches
: R9 n% q" h( j7 C create-turtles 1003 O7 W& e6 v& Y6 t, K- l- I3 Z
do-plots* n8 p/ i% w' W
ask turtles [ setxy random-xcor random-ycor ]
$ d+ B3 \7 e- N1 X" t3 uend
4 h9 ~# t$ Y0 W) C+ eto go
* E+ k5 J* ~' \ move-turtles: r% X5 I2 W n4 y, `% ~1 e
eat-grass9 L9 _2 `, j+ b0 e* ^ {$ H9 c$ g
reproduce
" Z. d0 i! A: X! u& g( j check-death
5 q5 M8 }8 {, h regrow-grass J7 l, t8 M4 W) s
do-plots, ^' u5 v6 M2 Y& y
end* p% ^. F$ T; F
to move-turtles( A7 y. o( B H& q! M
ask turtles [
u q% X$ y* d! w right random 3609 O. R3 L. m9 ~7 ?1 C" U# {4 L9 n0 q
forward 13 I/ O3 V7 d( j# X
set energy energy - 1
3 Q5 R( {! B+ X3 J1 n7 g1 p% Q; J ]
9 e+ w# V$ \8 v7 Qend
3 a" @' y+ b, I* E; x6 oto setup-patches
! H+ ~+ p* H# Q' K' `* q ask patches [ set pcolor green ]
7 V6 M. G* T0 O( }end) o7 ]4 s T- j# G2 u9 E% \% d
to setup-turtles
' a3 m: J7 a& W& Z- Q2 `: O create-turtles 100) t: }+ Z- {5 K2 v/ \
ask turtles [ setxy random-xcor random-ycor ]3 e2 h" U/ O# S ^* L% D) q- ~1 `
end
8 z& V: g5 R0 Y4 N7 ]to eat-grass
I9 H! E/ Y1 p" E& i r ask turtles [
5 r: j) m5 A) \) \% n if pcolor = green [
! r& u1 g6 z6 {- u \6 [( j set pcolor black1 e1 v: g U9 R
set energy (energy + 10)
3 u6 {4 H( Y3 K% q ]/ B+ x' H k |3 X2 E! w( i
ifelse show-energy?2 Q v! ?; f( V; a- \) m
[ set label energy ], J E8 T5 y$ {9 p6 m
[ set label "" ]
- H# q4 W- d- ?" @, _ ]
9 c! F( w- D- Nend8 ^6 ^2 i; X/ c3 K1 L4 K3 W
to reproduce
( {$ }) `8 o/ Y" }( o4 W ask turtles [: P) |- b5 J: k, G
if energy > 50 [
5 r: X# E) E/ T+ c set energy energy - 50# H) L# ^- I5 L9 n$ _
hatch 1 [ set energy 50 ]' O0 P( m j2 @/ Y
]) r* c* T' r$ [. |( N( n
]
. e2 Z+ A. f' i6 c% xend
' w( H) Q5 h2 x5 k2 Y5 ^% n; fto check-death0 u* w1 }6 U9 E" k3 Y
ask turtles [
0 @* {" y9 v! {+ f$ d if energy <= 0 [ die ]
8 a% c1 G ~* n+ W+ ]- c! V3 ^ ]2 N) |1 Y+ u6 e; m& Y1 U
end! S4 `) e. f! t/ c+ v1 r
to regrow-grass6 m) w# q8 M, x9 u$ r, W
ask patches [
1 w3 B3 D I _% J' A {& X if random 100 < 3 [ set pcolor green ]/ X+ n1 ?7 G: i# b/ x' y
]: f6 }2 r2 c3 t' C- h6 p( _4 W! K4 B
end
! c, S+ g% {( r# L3 B7 \" A% tto do-plots
& u9 v: I. z* Q0 L* a7 U( ^" g0 k/ g' p set-current-plot "Totals"& v! m8 T+ T( U
set-current-plot-pen "turtles"
6 D3 D# a+ w9 t) Z0 j5 E' T4 r plot count turtles. L) M9 \+ F1 [7 \! K# v
set-current-plot-pen "grass"
! X; n! e, K. H3 z+ z- U# s3 F plot count patches with [pcolor = green]
0 \+ f4 {) ^# v8 Uend
5 ~5 u e! a" W) f2 v: K* ?' [- d可是运行时提示no such plot: "Totals"
% u% w4 l' {+ h1 r& nerror while observer running SET-CURRENT-PLOT4 e$ m Z* [# |$ Q! M$ n% u0 Q9 |
called by procedure DO-PLOTS3 I( S% b5 Q/ Y T5 D: D: Y5 T$ Z
called by procedure SETUP" h4 `: R5 D" q5 ^
called by 按钮 'setup'& M- M9 j9 u8 w$ T' Z
求大神解答啊 |