我编的程序如下turtles-own [energy]
1 k- T- M+ U2 @, v8 ^+ Qto setup
( K8 f8 U Q! M% A) t% ~/ q& {* d clear-all
1 p8 \* r) b3 u9 C8 V7 a setup-patches
# {! g/ b0 G( x create-turtles 100/ o; R: y! K5 G3 x" Z) I c
do-plots
/ P- _0 v3 i. s2 x! R" E- F, i ask turtles [ setxy random-xcor random-ycor ]
: E2 ^ n& V- d3 c: O& Rend
% s' X6 W m, p. Z1 h( B# g( { rto go1 ]" r& `& Y8 b- O
move-turtles: c5 B: W& Y) s% V6 a
eat-grass
# u* N; W. I9 P( G. l& X reproduce
* _# r/ g, _" N check-death
4 B- ]5 G9 j& T2 V regrow-grass
W0 x+ N& u$ {( }" z do-plots
4 e5 L& h+ \$ v' vend
" C, w+ [5 V ^6 Hto move-turtles1 B/ R% x1 A) d' t# q( `
ask turtles [6 \5 c7 {# D/ }/ e& o& c$ H
right random 360+ Z4 L+ P M" [, @9 L+ q a
forward 1$ P: U+ ?1 c- r, z4 Q0 y b
set energy energy - 1
# R) ?% z T* t2 n ]" M Z$ l* Y$ `2 z+ p9 w: O' N
end: V8 W8 K3 l* u
to setup-patches% M: t" B- {$ O8 G
ask patches [ set pcolor green ]5 g4 o$ v7 l. ]* K+ n; G: z
end
* F( l7 t4 Q# Pto setup-turtles
1 O2 \- e) l/ \. u9 }: V create-turtles 100' y1 V/ t' {4 A# i" X2 W: {
ask turtles [ setxy random-xcor random-ycor ]
/ v1 v, E& t! send4 D% x! c+ S" z3 s) y7 z
to eat-grass0 T" f4 Y$ v5 k4 |3 C
ask turtles [. t; l/ J- K i8 \
if pcolor = green [
& G, G' l5 P7 e1 _ set pcolor black
6 v4 q A+ h, X2 m7 l Q+ C7 Y: { set energy (energy + 10)
6 S1 {/ V( P2 j ]
% q7 h8 l% R* u$ T' P- n2 d+ k ifelse show-energy?
% U: r$ I: S1 a [ set label energy ]
! A" v& A6 Z1 V4 _9 g [ set label "" ], u0 C8 z( I2 _! B+ M$ ~
]8 v5 o2 n9 o. V( z. h0 O. j
end( Q3 t6 q6 s9 V
to reproduce* u: I- [/ c/ l5 o
ask turtles [
+ j' S/ [2 Q0 c- B2 H/ W, I if energy > 50 [( a- d* d1 w+ I
set energy energy - 509 o- b* R/ l( f: @1 H. Q4 c
hatch 1 [ set energy 50 ]
" _' l, p G* O m ]
: @4 j1 u) D: i3 q1 j" f- S. e! { ]
, r6 T; E1 z, }3 p+ s5 L. g, D/ Nend
1 v# M2 r. ], ~& Wto check-death3 M0 p) B1 i8 W x/ j/ o6 Z
ask turtles [# U, A" w5 e* q5 l4 K5 q( y
if energy <= 0 [ die ]% f5 `0 w! K. D) `
]& d; M. h2 O. J- Z3 e; ]
end
: [# X1 q' U! i6 y8 rto regrow-grass
% d0 r6 G% j6 l7 |6 m; J7 P( A; a+ ~ ask patches [$ _% F3 x& g. d
if random 100 < 3 [ set pcolor green ]$ l3 h+ g7 c, ^* U+ |( h, ?
]
9 @/ B& P& a0 S6 i" R/ c6 ]end% t: x2 |' }: z6 n
to do-plots: |: I N3 D6 ]+ P4 t, T5 w
set-current-plot "Totals"
( @. Z7 t5 O$ F0 A9 D8 R set-current-plot-pen "turtles"8 J' b1 e( j- }) m8 t, z& Z* m* ~# I
plot count turtles
& O. g c; R! A8 S( [ set-current-plot-pen "grass"
( L, [2 `4 H" d( q8 Z, E& a plot count patches with [pcolor = green]! E* c. u' @5 _4 b) S$ P- r) `. ~
end* ]1 J. ?! S0 ^* I M. n( \! D
可是运行时提示no such plot: "Totals") w0 d# I0 i5 [& {# s3 m* ?
error while observer running SET-CURRENT-PLOT, w3 s, W9 o7 q5 c9 T ?
called by procedure DO-PLOTS( N3 c9 P" `$ Z3 w
called by procedure SETUP' L4 T% P5 \" b7 V$ r+ ]# ]
called by 按钮 'setup'
v9 A: I. A: X+ Z求大神解答啊 |