我编的程序如下turtles-own [energy]
. h5 z0 m6 Q1 a: J1 {0 M2 j% wto setup
9 `! ?4 a' j8 d. C& p- Z! p clear-all3 `- q# s" B6 @# H" N: g; C) O
setup-patches
7 Q3 F; R1 g* K create-turtles 1001 y, P7 b' K( h
do-plots
/ S0 _ D* D* b+ D1 F- V ask turtles [ setxy random-xcor random-ycor ]
! U D1 _, A5 J4 @end
S' K. M: x2 g% F; t- |to go
; k# l0 G/ t, V) t0 n/ r move-turtles, n" B& @3 L& @/ v
eat-grass9 ^, @8 W9 T. F. {& N6 A/ @
reproduce
4 t. d6 R- S& a" i check-death+ p0 ^" N. f6 q6 X, q# N+ ~
regrow-grass
9 S4 S# x2 {: r do-plots
% k* \. g3 J4 L) V: Iend" E: p/ N# a6 ?) ?5 C$ p
to move-turtles
, M0 u7 c, c4 {6 F- q9 \" m# W ask turtles [
1 S$ d2 Q8 Y" y, ]) K% G- t$ e2 V right random 360
: \8 s2 `; Q; Y6 X) ~ forward 1
Z+ s) b# C' Y0 [4 B- k set energy energy - 1
3 }, R% ]& S% Q ]3 ^8 W0 {/ @7 P( I. C' h: ]7 U& D& y
end
1 R: U* R0 l. e3 Q+ bto setup-patches
0 D7 r, s5 C. ~ ask patches [ set pcolor green ]3 P9 A9 V& H& [, Q$ N3 @6 a: D
end( ?0 o4 D G! k4 q7 I( { x5 O
to setup-turtles
3 J1 G# X# T& H( u- ], a create-turtles 100! v0 h* c+ H" y T( ^8 A
ask turtles [ setxy random-xcor random-ycor ]
5 q4 W# u* G% e9 \end4 ^ Q+ g, \. Q2 M% a/ \2 Q# {
to eat-grass( R8 _* O; k: N# k3 `7 r0 l
ask turtles [
! Z9 S! D% K7 m& S7 [1 W if pcolor = green [/ F- z9 w$ ^; l# q
set pcolor black
1 |# t- N1 |; l- a+ y& K set energy (energy + 10)& [* q5 f5 B6 a+ c3 @2 W) ]1 u
]3 R1 `1 r& y o1 J3 |* v( T% n
ifelse show-energy?+ ]; |+ D: s: ^
[ set label energy ]
' Q( F& L/ F( N- e [ set label "" ]; A. [ I' E& s0 @ t y
]
3 T! O2 B# J, l# i' @end5 W# Q8 a) ~9 t) d
to reproduce s4 _: z7 H' F. k* ]5 h5 w
ask turtles [
5 p2 R) l; i) D$ R7 g8 t+ b+ n( _ if energy > 50 [7 Z3 G, p& X, w' T- G7 U7 q
set energy energy - 50
* } j$ X9 S; z* ^ @. @# i% g& V5 ~# [ hatch 1 [ set energy 50 ]5 x; h9 ~% \7 K3 Z( L
] B$ o2 d4 z5 N* |/ c6 B
]2 r6 a+ T- s% X- n# [
end# F9 b- q+ c4 l9 H) y
to check-death
K7 q( k& E( Z1 ~ ask turtles [% V1 Z- w- U- G; r0 W
if energy <= 0 [ die ]: p* z$ t h1 S0 s/ b b" r
]! e" A3 z4 w7 \. h; M- s7 y3 m& c
end
* J3 L- n6 M: [5 z. A' Ito regrow-grass$ {+ [' P9 f, |9 R
ask patches [' D+ d8 p3 `4 @6 ]
if random 100 < 3 [ set pcolor green ]
3 g2 H( F- c7 c! J7 y ]
4 p' X+ k4 X( Fend% s2 q6 V9 ]% }4 r' V* f2 [. ]; r! X
to do-plots
2 Y+ p. C+ }( A* W% @" |2 s set-current-plot "Totals"+ N; m' x9 G# T! w2 w# k
set-current-plot-pen "turtles"- `/ h5 T" O' t$ H8 a5 L5 s1 [: h; z
plot count turtles
" c3 R# b4 W/ h; | set-current-plot-pen "grass"
( i* G0 `5 L+ @/ M2 L( x9 T5 ^ plot count patches with [pcolor = green]7 M6 o( p" y" e5 T4 ^, k1 u
end
5 W* M; `# Y' Q可是运行时提示no such plot: "Totals"
; D* {% p$ A, D; Terror while observer running SET-CURRENT-PLOT
# n }5 w3 r" ^! L' L, _ called by procedure DO-PLOTS
\# }; V. [, e called by procedure SETUP, ]3 j' d s" Z7 i% L' [( I1 I
called by 按钮 'setup') m- U g% H, E. R. B' r; H. N
求大神解答啊 |