我编的程序如下turtles-own [energy]6 n7 W5 ~1 b. w6 {' g. @: t3 e* I
to setup2 }8 T. O' Y6 T
clear-all
& g+ j' U5 S1 [2 j8 \0 C& ` setup-patches
! V6 j* n7 ?: ]0 G create-turtles 100
0 n+ C- V1 S/ o$ v do-plots
2 m6 S K) O& n5 t% Q6 ] ask turtles [ setxy random-xcor random-ycor ]9 c+ E$ E3 k. C' ~" R/ h
end0 e( P) W/ w% d- t
to go/ u5 {1 H; V3 l8 ]) v7 q
move-turtles% k- O: ]- d9 T# b
eat-grass
V; R5 i; W8 V, n3 K1 F' J reproduce0 n" ]8 |$ r3 o; ?0 u8 ?
check-death1 z6 W- A% ~" p6 t, H9 f& k2 B
regrow-grass0 ?. N1 a* ?) y& J, |
do-plots+ t- [) h {8 {, ~. O% Z
end" k# P& Q' j* I$ x; z. m: L. u
to move-turtles
$ v1 A+ X3 {: c( v% h ask turtles [
z5 G6 ]) k/ e$ H8 i1 ?7 O/ X right random 3603 O0 f: h, V0 u/ g6 c) S8 Z
forward 1
2 R) `" H8 ~/ @" V7 q9 I' W set energy energy - 1 T% w `7 O/ [0 z9 V6 l
]2 i) m( y* t/ e9 M# j' t
end2 u" \" Y, k/ z9 e6 d
to setup-patches
0 L6 Z6 \! h1 F* {& K ask patches [ set pcolor green ]
- C7 Z5 b9 t4 E" lend
" X1 a" ~" z- c H" x dto setup-turtles% r. Q& E$ P1 ?7 ?# c0 K
create-turtles 100
* P2 C" K* [" n6 R) a3 u ask turtles [ setxy random-xcor random-ycor ]+ F: G1 [ p/ K0 ^
end
+ M+ R! X7 ^" d+ Y2 k: gto eat-grass
" C( d8 J6 j' ] ask turtles [
% Q2 Y# w! i" `( O if pcolor = green [: y3 d1 A% n a! X
set pcolor black8 s3 o( N% B* N w& k+ R( c
set energy (energy + 10)2 X& T6 d. N6 H1 \, I: x
]6 C( s; G# ]) `( A$ V. [' w* }
ifelse show-energy?8 l# j( _2 Q4 U8 L
[ set label energy ]
* @5 Q/ T9 a3 _' M( { [ set label "" ]! a5 E& r# C" _5 B2 q* {$ o+ a
]
1 y9 |1 p& ]2 \end
' w+ S$ E4 n! @6 p9 Tto reproduce( K: [. g# @2 C
ask turtles [" S, P+ Y. o) u P: b8 t: N5 `
if energy > 50 [
6 A, a" g* j6 B! h set energy energy - 50! A* A8 X# q/ x. N2 s5 N
hatch 1 [ set energy 50 ]7 l8 X+ | d7 F! b. W7 l
]; ^. j, y1 E/ D+ b" R2 u
]
1 i4 x7 ]8 f+ Z* i+ x" Fend
0 v# K# q( v# ~% k( j0 @2 Lto check-death
2 F& [# t Y T9 |3 t ask turtles [* H* ]) v8 @. q: ~# a! a
if energy <= 0 [ die ]
5 k7 Q* ?7 M7 Y6 [% {6 j5 F. q$ }! w ]( s8 q; Y- S9 c
end
1 a0 F2 T1 k( ^4 A' K: y0 sto regrow-grass' Q) X( ^8 x. ^
ask patches [+ ^/ Q; Z# s8 }
if random 100 < 3 [ set pcolor green ]0 ?. F, D- I1 ~; o4 A! ~- o- d6 B
]
0 a. c4 r: o6 p. G7 J- W# ^! |* ?7 `end
1 m- ^( u& p- N! Q* \! rto do-plots8 S* ~5 n$ \+ v
set-current-plot "Totals"
" K: ~5 J k9 y; W: R/ L. I# x set-current-plot-pen "turtles"
7 _7 k- E9 e8 V4 r* B plot count turtles
3 C& l- H/ X5 g' ?8 ]- S: I set-current-plot-pen "grass") J# u5 T" ~3 {8 M1 `: G- o, \2 O) ^
plot count patches with [pcolor = green]
" |# [' @ }% Jend8 G& o% x8 K4 s: }9 B1 h2 [6 U
可是运行时提示no such plot: "Totals"
" s8 z6 @8 g' q& c& }/ _error while observer running SET-CURRENT-PLOT. C- x3 O" _2 W9 j. t) q
called by procedure DO-PLOTS# b4 q, B# d! r) `; v* m( z4 h
called by procedure SETUP: S) O9 [& I t; o" ^% k+ r
called by 按钮 'setup': X8 e A6 B1 L/ z) _
求大神解答啊 |