我编的程序如下turtles-own [energy]/ @0 l# Z3 Z8 h' T
to setup$ h6 u) O4 `) r0 u7 }
clear-all
& O; b& Z" K# S4 D7 R setup-patches% b2 S9 ~9 b# a
create-turtles 100
/ ~6 J# j. i g- f do-plots$ h( n, j$ Z" `" Q' s' t
ask turtles [ setxy random-xcor random-ycor ]6 b0 l8 p& l [" e+ _% l& ^; H* A
end1 I9 N* F8 X" }- v2 U3 p& s
to go
* @: o7 t2 C( A move-turtles, K( M/ w! F. B1 H
eat-grass- z) @$ Y' W1 h% n4 p3 S/ A
reproduce# p! ?: q e9 G1 `, Y
check-death
4 _$ n, x8 K& f5 C) v- f regrow-grass7 G7 S' Y* M; |2 `( G) d* W
do-plots& Z U1 }* O' {# Z$ H+ b
end5 n) | d0 T9 r* g
to move-turtles
2 ^2 a# u- r v" x7 T% |# `5 R) P9 w ask turtles [5 Z4 P9 V7 ]) r
right random 360) A+ ~! h: B8 p8 Z; z5 o
forward 1
0 {3 c: m4 X7 }0 X' `& i set energy energy - 1# _: i& {: ? k8 M; A1 q
]
; {8 Y/ o; C$ m" P. g f" ?0 c8 \9 `end% }, j4 k( h, E, c8 W0 }4 V
to setup-patches* Q3 c$ h- @0 _
ask patches [ set pcolor green ]
# Z: o9 g1 t( q% ]( L( Q4 bend
$ U6 T7 T, c7 r9 E# wto setup-turtles
* T6 Y, {. b5 K$ ]9 s: g0 I create-turtles 100: _. S. W5 d: j$ ?" z- r
ask turtles [ setxy random-xcor random-ycor ]6 U! v# s8 ~. f7 q& D7 O" G
end
5 n1 d4 F. N* |: R' o- eto eat-grass
# O( y# ?: C0 y3 V ask turtles [# h1 Y+ g# i1 Z' V) h3 o( t
if pcolor = green [
* |7 U# t9 _! C set pcolor black
9 y0 w( o: X( s& h set energy (energy + 10)1 I# s8 ?0 j9 |9 k& [# i
]* _$ ?: B; o! k9 }4 L+ ~) A
ifelse show-energy?
8 Q! h' ~& `+ Z9 v' D' H [ set label energy ]
* [" M5 q. J& p) \3 T& K [ set label "" ]! n( V0 B3 H/ ^3 W, ?
]& y$ H& V0 C) \5 i, e
end+ D" Y/ W$ i$ J% h5 S" E2 [
to reproduce. g( `/ O5 I# l6 K% D3 b: \
ask turtles [5 q2 k- d0 o9 o" ^
if energy > 50 [
3 G. k( I$ m& i# t+ D- s) z set energy energy - 50
: c( \* S+ ?$ _ hatch 1 [ set energy 50 ]
- O* Y; s: A, Q6 L3 y1 E ]
/ j/ P7 q5 c' ?( v ]
5 x7 H, A, }# {4 E4 V% dend
|' p8 `$ e" Cto check-death8 H! O: o7 w6 J q" q2 U
ask turtles [
- h. W' c4 S7 J8 E if energy <= 0 [ die ]
+ F" S; G! x4 n" R ]
, y- x# o l7 E0 D' cend5 G* j4 ?3 ]/ M; z) e2 }! N! t5 V
to regrow-grass; [' a7 }/ p0 ~5 V, q0 y
ask patches [1 c. b1 h( ?$ i, Q/ k. h$ A% |
if random 100 < 3 [ set pcolor green ]- k5 Y9 [0 }! N F
]7 `# P0 x9 ~2 G+ D' s- C
end' L+ A* Q" o* s0 C7 ]' u/ R
to do-plots
/ v2 O) h8 c+ i2 s* }: k' ?) w! g set-current-plot "Totals"
' ?- R' G/ T* D set-current-plot-pen "turtles"
5 Y7 H, X, @) ^( |# g1 V* P plot count turtles
. f; {$ T* |$ ]/ E* M- ` set-current-plot-pen "grass"
8 W+ T& ^9 w9 _ f( V# U$ _ plot count patches with [pcolor = green]- [9 F T. C' H, v$ ]7 c
end
$ t4 ?+ [) ?* v0 Q: ]8 j可是运行时提示no such plot: "Totals"8 e* a7 L7 ` W0 L
error while observer running SET-CURRENT-PLOT
6 M" q: ~3 Q0 H called by procedure DO-PLOTS. s# ^5 x" d5 M7 c
called by procedure SETUP% V K4 ~( \2 R
called by 按钮 'setup'
& ~1 X, \$ I8 O6 E. V求大神解答啊 |