我编的程序如下turtles-own [energy]
: n9 N5 p) t* |5 o c* V7 l2 ]2 sto setup. ^5 B5 u D. j$ B5 v* u0 A
clear-all4 Q/ A: P/ z z, }, R5 g
setup-patches- I2 b) f; Z7 y, H {; Z5 u8 w# u
create-turtles 100
D( M. {6 w4 u& ?- z$ ~2 M) w do-plots x8 I. K1 S1 l* R1 C
ask turtles [ setxy random-xcor random-ycor ]8 b) e7 k0 E/ O; |# ~
end
u& z6 W4 g5 ?to go5 ]/ S* f5 M+ l/ ]# w
move-turtles
6 K5 ^) ]- @0 {" a eat-grass
* I( Y1 C+ }- j$ ?8 F4 | reproduce+ ~. j7 s! R: l6 L L
check-death) _7 a5 ^0 R, G, {
regrow-grass" e4 D4 z5 v2 J4 Q
do-plots
% ~5 Z# [2 ?$ X% S# Gend% T$ H! f$ L. q: L
to move-turtles7 T, Y5 A% R6 A( C- x( O" t T3 g) O+ p
ask turtles [
( @- m' c/ X1 q% b' a$ G) _ right random 360
, U' `% ]! ^+ ] M forward 1
3 P( ]0 |: g, D, f( `; a9 ` set energy energy - 1
1 Y4 u. l' [2 ]5 U ]
7 W- e3 {. r$ }" l1 f8 `end
' y, E3 s- \' }) P$ ^8 Gto setup-patches( O1 R0 ], {% V" }; t
ask patches [ set pcolor green ]1 h8 a) \9 v9 F: q% i
end
# L0 o8 _# T# u6 Y6 E. ?2 Y; Wto setup-turtles
. H2 G* L2 @+ {( |6 T create-turtles 100
1 Z2 A% i) d, g5 o$ y+ p# C F ask turtles [ setxy random-xcor random-ycor ]
+ x1 W2 Y8 Y2 s8 {. m3 `end
$ A- \' }4 |: O& t; P3 Dto eat-grass
' V) z) U K8 x. \# } ask turtles [& Z0 R A9 S9 ^+ e: O1 Z' N1 p/ p
if pcolor = green [
5 X0 p# U. E# }9 G2 h set pcolor black( r- D' n8 P- O. y2 }
set energy (energy + 10)
0 x8 q! u: t; P* h ]0 @8 |; H6 D8 P0 K& K
ifelse show-energy?
: Z0 |+ ~2 _* w7 O w [ set label energy ]
4 f& p8 l' m2 y1 Q [ set label "" ]
s$ T5 d, I' q1 t4 Z8 E ]
' y7 {0 n: m* s# d: w( N2 J& ^end
" `* J+ b8 S, ?& ]# M) }; H% tto reproduce
" M* t2 Q. C8 z+ x A0 p' V ask turtles [
: G1 x; R8 d/ W5 P! d, d: o0 O( b( ~ if energy > 50 [
9 s6 a! i8 ~: r- `6 c set energy energy - 50) I$ w( _& g# W
hatch 1 [ set energy 50 ]) y: Q/ W+ p' z8 d% o+ [
]
5 z' s, S% \% H; w ]+ H! D. _; j8 p- y7 J$ M9 H
end2 G- P% |. s; E2 l; h3 v) z
to check-death3 d+ |2 O0 `3 O9 g5 R! I
ask turtles [6 A( m$ a3 W" _# X( x7 W. p" Y
if energy <= 0 [ die ]
5 y6 ^+ i+ m% p* ?+ @* R# ` ]
- L% d$ T2 k& I. vend
8 d4 R4 r w5 R* \to regrow-grass
$ J( C: ]0 t; M+ T ask patches [0 {" v i/ G+ I- Z P( w
if random 100 < 3 [ set pcolor green ]
i' {# Q% A4 @0 g& p% j* h8 s ]4 J% M. s0 x( y; s n. N6 V5 i/ u
end5 b7 r1 l0 j0 p) v$ S& F( I
to do-plots7 q; Y5 \4 E( S5 L
set-current-plot "Totals" X) O' ^5 A9 w5 E3 J9 d- v
set-current-plot-pen "turtles"
* d2 z! ^% Q5 r7 H/ l% `! y/ S0 @6 X; I plot count turtles/ k: ~! w8 @+ g2 y5 r+ z
set-current-plot-pen "grass"
- _8 ?' E3 J' x plot count patches with [pcolor = green]& R" O6 h8 y/ r9 R, |
end! |2 W6 {+ Y2 v4 w# z' \5 \& P
可是运行时提示no such plot: "Totals"( f0 A1 i' K" L$ l+ u9 g; \
error while observer running SET-CURRENT-PLOT- L; B& u, m: [, j% v" F
called by procedure DO-PLOTS
, S; p3 I! i' A* g+ ` called by procedure SETUP: W4 c4 |9 S6 |1 b
called by 按钮 'setup'
+ B' ^! l9 U) \; B; m- v$ _- h求大神解答啊 |