我编的程序如下turtles-own [energy]3 G/ R. h) E5 K5 Y
to setup
4 J7 e4 ^/ S4 t5 Z2 t clear-all
- y/ X2 l3 g8 V' h3 D setup-patches
4 o8 i9 P" r" l* R9 P create-turtles 100
/ Z$ o* X% L5 t0 O do-plots1 h- v6 s8 p; h6 N% q! {4 @
ask turtles [ setxy random-xcor random-ycor ]
k4 Q2 J9 K& h/ a# S6 B, A$ send
S1 E' ?1 b5 t4 \5 e% eto go
0 j2 |# `2 `) C$ | move-turtles
$ r' s9 s+ {7 G eat-grass$ D$ m! ^5 p0 [) { [+ M5 h
reproduce
! [8 X$ e. z9 x# r8 ? check-death* V7 c t" r( b, q$ L n( }: z
regrow-grass3 ]3 S& t+ U8 b9 |; K/ @
do-plots
7 ]5 v& [# i9 V& kend
( ^ E: J& _# P% b/ ]/ A9 C3 ito move-turtles- m, Y9 {: D& z9 W! ]
ask turtles [
8 k( y5 O# J2 [" Z; t right random 360
4 {0 a* }' G9 ~0 W forward 1* B+ Z9 h! j, b/ v4 O6 y( j6 E
set energy energy - 1, \* b; _2 X1 @8 o4 c7 O9 s
]; q6 X# O; z% t) [: A) J9 H! R
end
) i( U# p, ~% a) h" i4 eto setup-patches$ K0 ^* Q. N1 g- `: z. ^+ I4 a
ask patches [ set pcolor green ]
$ s; O4 s9 i% W% K4 ^6 yend
U1 y4 ]- N! L) K* e% s9 R, s0 {to setup-turtles
! s/ S, g- e3 u' H0 W$ e: U create-turtles 100
' u( M# g) X" s& T) _ ask turtles [ setxy random-xcor random-ycor ]
4 m# E4 j. C3 u# ~% yend+ `' X! _4 i7 S, o/ |! W% x! w" W( w
to eat-grass% k+ ^( ^) q, P+ U8 r
ask turtles [+ L1 \ l I9 O" z; S
if pcolor = green [
$ n6 h) j3 c; D& T set pcolor black4 b1 C+ E! z" X9 }. \0 L7 f
set energy (energy + 10)& n3 F9 n" b4 f6 t0 n
]
- ]* Z) ?/ E( u5 c1 U. r- i5 r# K$ k ifelse show-energy?
; |. _9 `4 ~0 E) N' E7 | [ set label energy ]. P w0 }9 K: E5 x, ?
[ set label "" ]
+ ^6 L5 @. p( d/ { r. a2 E ], R/ k- M: B# B8 c
end
3 r& f0 `) ^4 wto reproduce( z4 q" W+ h. H. k
ask turtles [# {+ _5 M5 }0 d% S3 Z# m! ?
if energy > 50 [
4 K/ F0 h: L: \6 ^. A set energy energy - 50$ b: L4 j) e- }3 F
hatch 1 [ set energy 50 ]
7 ]$ G" A5 a0 T: A ]. e, l2 q" U0 ~+ A3 h/ X9 r
]
& h# N- v6 k5 n/ n8 K. @$ `end
4 }( J$ T4 f6 r, v4 tto check-death
- U" P) I+ z O* W5 J) H ask turtles [- R0 X- r) x% `
if energy <= 0 [ die ]
' z2 [ U+ m0 K* N) ~ ]% Y% p" h) l) W2 O% }1 w
end
9 a3 V5 H2 }/ z( Nto regrow-grass
- h2 C% R# J5 x% d7 U ask patches [# z6 j9 L$ _% _, i3 J+ n2 P
if random 100 < 3 [ set pcolor green ]
, o* z- U2 p' Q9 _$ `( {" { A8 j ]
3 w% l/ i9 R4 k/ ~ ?: A8 d' s& Nend
5 h0 N/ ^7 g7 k* l7 pto do-plots! E7 \: F8 x3 Z4 c3 @7 k! N3 s
set-current-plot "Totals"
# L5 _: w$ ^1 m- Y; b set-current-plot-pen "turtles"1 p1 p: D) L5 g# ?
plot count turtles
' h8 D6 \* ]. w8 |# l. P set-current-plot-pen "grass"# a4 {' {9 D8 h
plot count patches with [pcolor = green]5 o/ F8 t3 Q! z
end
) U( o6 q' U4 P2 b) Z% ^; V1 F. n( B2 b可是运行时提示no such plot: "Totals"
, ~7 A- z, p7 ~' W; B+ ?8 V' Ierror while observer running SET-CURRENT-PLOT0 {" u4 v/ h# P
called by procedure DO-PLOTS3 ?8 F( A; I/ O2 S4 _, h X
called by procedure SETUP+ m% s+ s" ?7 l& i
called by 按钮 'setup'
4 O% Q* O# u" |) }) l求大神解答啊 |