我编的程序如下turtles-own [energy]
) N& G9 C4 v9 s0 x0 Q4 Oto setup, j) @: J. J* ?# e: x- X6 s$ |: y
clear-all. W" ?" U- S0 `) ?" [* D* ?2 z
setup-patches
6 l6 L- H0 ]; c, W+ k create-turtles 100+ R6 N3 f, a* _; H9 z0 U' W, ~ y* z& n
do-plots
0 S1 w6 P4 x) |9 a, V8 _ ask turtles [ setxy random-xcor random-ycor ]
( x' l% O9 {/ S) T. Fend
0 v* Z" }8 t( Vto go
- X7 j& O& T& @; Q move-turtles
u" @. d# g3 V& Z3 K0 U eat-grass1 ~7 G% l) F7 ^$ i
reproduce/ j6 J6 _6 ?' S; T
check-death
0 ]! H+ {9 G9 G# [' N" _" C regrow-grass
) t: D e# E# A; e3 N do-plots
$ X0 o; |: R; Y' a" tend
5 s/ s3 [+ r* Y! uto move-turtles
' i4 B8 x/ [6 i; q# a( ] ask turtles [
6 W% t+ b6 o8 O+ R$ C1 g right random 360
j4 i& B$ I/ {! _ forward 1
1 i2 `. W. y2 P set energy energy - 1
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end
+ |" B+ u7 S& G9 Mto setup-patches+ t) @7 P; U( g
ask patches [ set pcolor green ]% R! b* f/ k$ ]8 {1 g# p: B# Q' I
end
- j, E8 ~' ?8 q7 Y1 Pto setup-turtles, n/ r' Y2 g! n3 n
create-turtles 100
t }9 G; Y6 [9 U: u* _% H$ _4 T$ ^ ask turtles [ setxy random-xcor random-ycor ]
+ D8 r) i; e6 Aend
- N) y: F8 A* f' Uto eat-grass, C& Y/ ~$ r, L1 x# A* Y
ask turtles [6 u" ? B4 b4 K; |4 _* w
if pcolor = green [
! j% {# h' u$ N6 B- M set pcolor black$ N: T1 K: L# ?# C! A
set energy (energy + 10)
( W4 ~' ^9 y+ U- p ]
$ m* l" @3 [8 A0 S" _ ifelse show-energy?
9 O$ w3 z1 b! U( I5 P [ set label energy ]4 w# R0 u Q1 z0 v5 Q% x
[ set label "" ]! @( o$ j5 H0 [9 R" A( n4 h* R
]
6 P, ^' [7 S V0 z7 G G) zend
9 h' o5 q/ H Q% q) Z0 Oto reproduce
% V, F4 A( u, B# z ask turtles [0 ?/ P& R; _2 V1 \
if energy > 50 [: ?3 C5 j M5 i1 f# U8 `
set energy energy - 50( X5 z3 M* q/ Z, `$ W0 U
hatch 1 [ set energy 50 ]
2 e2 [ W2 E7 Z+ D' d! | ]
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end
6 O# S/ } A. k' ~to check-death- T5 g7 L1 [* \; N8 v! T8 L
ask turtles [) d3 |- ]4 I; t2 K/ F) |/ Y8 N
if energy <= 0 [ die ]
+ G8 g% n! f1 x3 O: C7 T ]5 [2 P& L5 o ]; P* v. \0 V
end
+ b+ Q0 d' k2 _$ d* c, g8 {2 Rto regrow-grass
# }( x- J9 O7 H& m7 _$ P ask patches [+ C, B9 Q1 p7 S4 x# G
if random 100 < 3 [ set pcolor green ]
' I2 k& I/ R% A3 ?2 @6 ], S A ]
# y; C1 G$ N1 \end
0 _( L, W/ i N6 f* pto do-plots! I5 n$ H" |- D2 c
set-current-plot "Totals"' j" V* A9 {9 v
set-current-plot-pen "turtles"
$ _3 m' `+ y5 Z5 w+ {5 n, P) s) x2 j plot count turtles
5 P* e7 ~8 Q0 @- w/ K) r2 _+ v set-current-plot-pen "grass"! `% G# J! |0 K
plot count patches with [pcolor = green]& w# D; X$ E0 R+ w0 k
end T/ F) y, L: \2 B
可是运行时提示no such plot: "Totals"
/ d: \% j+ U) g" l3 Herror while observer running SET-CURRENT-PLOT
6 X) X6 L* C. Y0 g called by procedure DO-PLOTS+ H( o8 l7 b* \/ G9 `7 ~( }
called by procedure SETUP1 L- K# [9 x9 \% q2 C
called by 按钮 'setup'+ s) j, @4 ^* C* ^
求大神解答啊 |