我编的程序如下turtles-own [energy]
1 o& z& _, V6 ]4 |) u, jto setup1 f/ {( x9 o) g% X( x( x
clear-all
! m( y5 f2 {% Q setup-patches
! [% ^+ M! ~ g9 _6 J create-turtles 100( {$ J4 ^; K) J
do-plots1 h# d# o+ V: h3 r b% _; x
ask turtles [ setxy random-xcor random-ycor ]
4 N0 \4 {9 ^# m, `end
2 R: j1 ^( @1 Ato go0 ]$ `& Y' A2 G' r; u0 E
move-turtles
8 g5 B5 z" w6 e; H8 n: t eat-grass9 P. i5 n( R/ M& Y8 M. v
reproduce/ v( F8 l( n% e# Q& R5 { c
check-death0 A0 K) d( l- W5 x# e4 y
regrow-grass
' c( P% L' S/ ] do-plots
4 Y2 Q9 x! e y9 l0 yend u% ^! f5 ?' ]2 ?. j5 m/ f* z
to move-turtles0 N4 I8 l& d4 s
ask turtles [
; x. X" W9 P/ x$ E! w1 E6 W* u right random 360
& j# L% p& l; P& j0 k2 [ forward 1( k9 Z+ E" y0 V6 X; W
set energy energy - 1
) w7 z x, B' X2 y; @ ]
* I' V- G5 L1 o, Wend. a- @+ r u6 d6 f" Y+ x- |8 h
to setup-patches
6 M5 b, @) Q7 H% z! c ask patches [ set pcolor green ]- m" u! `. E& E3 w' F1 z
end# n4 { ^8 S. k8 a/ z
to setup-turtles
/ ]6 S2 e [) W# R( C4 h) v create-turtles 100. p# W$ z/ U }8 a5 \' U
ask turtles [ setxy random-xcor random-ycor ]
1 D" y e7 c) t8 ]end
- o) y/ R* z& s2 f5 B4 c' n: N7 s8 eto eat-grass N5 i) s7 j0 k' K7 ?
ask turtles [
) [( v' I% @* K" ~ if pcolor = green [5 X! j* Y) I1 \+ ?, v' x* z+ ?; Q
set pcolor black
4 t0 N! V; F. ~7 Q set energy (energy + 10)$ q% p8 H" K. o) C/ e5 D
]3 E9 b# [+ p x& U4 f
ifelse show-energy?
" L& n7 q! B" _! c; g6 Z# i# h [ set label energy ]9 r. Y) r1 W; L( Q5 ?- v5 w a+ y
[ set label "" ]
! H6 ^( B8 u5 t& [& H1 a+ f ]0 ~+ W0 |3 p) K1 j" F7 v
end
2 f9 M! y" D6 L; V5 j) V7 pto reproduce, V1 u+ H) L% b" d1 z5 O6 D# W
ask turtles [
! u y* s. r2 @+ O7 q) @' I5 Z/ } if energy > 50 [# p* u" g) ]9 I0 v0 ~- {: d- P% L
set energy energy - 50; X) R# Q, J# y7 n% C- y. n
hatch 1 [ set energy 50 ]) O2 J( O% I/ Y! t' u- Y2 ^: h
]
8 y9 }$ M6 s. @1 \2 r# E) L' L4 H ]
$ z$ b) s2 V% ~( tend" {0 `3 E+ b! x$ W n2 u
to check-death
7 ^) y' I% l+ _. x ask turtles [
1 k K1 ]( D7 Y+ t" Z if energy <= 0 [ die ]
# S, [, u8 r6 ?5 Q ]+ u1 v$ E) I. b" ?
end
" |3 [* E! u6 S& P& e7 [to regrow-grass
* t# E/ c W' f3 x% z ask patches [: V7 P) m) C, T% L
if random 100 < 3 [ set pcolor green ]; ^ F0 h& X' J5 R" _# V: C
]
, B; X0 U4 j, iend/ X: \) R. B! ~/ c% U. S+ ~
to do-plots6 y+ G' G6 b# \$ C
set-current-plot "Totals"
0 E* {( N. D' W set-current-plot-pen "turtles"" l0 @5 v: X1 Z7 z( Y+ \- V( Z3 z
plot count turtles
& u4 I! j; [2 P5 P2 A/ g2 v1 w2 } set-current-plot-pen "grass"/ L7 v7 L' P: {( T6 C/ O
plot count patches with [pcolor = green]# Y9 E& w" P3 h0 Z5 ^
end
" x" D( M% o2 B+ i; y" O; z可是运行时提示no such plot: "Totals" Q5 |; N. O- O7 Y' R3 y5 R' @( w2 p/ T
error while observer running SET-CURRENT-PLOT6 X/ M1 @, K% v0 N1 S6 V: O
called by procedure DO-PLOTS* D: t& J, U! `9 J- b% i
called by procedure SETUP
+ y' |- T# e$ G4 c# P* D called by 按钮 'setup'0 w6 t1 H: c$ A! i; `( q
求大神解答啊 |