我编的程序如下turtles-own [energy]7 i% B& p1 _0 Q& l0 o
to setup
8 ` o' [& E4 X& V$ u clear-all3 Y* I$ ^1 n2 p! h+ u5 m) `
setup-patches5 u' J0 ^, H; n+ `; E0 I1 @
create-turtles 1008 n1 X% T4 S. u7 A, c) i
do-plots, V* h9 v0 i _9 v, [. B2 |
ask turtles [ setxy random-xcor random-ycor ]7 P% Y5 U# v" m+ U8 }# h
end# l6 H2 I M- e% e1 z
to go
0 N8 c. x8 Z6 @! E( h# N move-turtles
: y, Q3 T" Q: u! | W3 O0 I; G eat-grass
2 L5 k( D: f5 w. ~ reproduce$ L% D9 K! z# }: a. Y
check-death
2 g, Y# b0 m7 R regrow-grass
7 x3 O# m" @5 M7 b% f do-plots
& f8 N) W) p$ \5 M) K- [end" I4 j/ U( P6 j' Y* W, b* u; a* i
to move-turtles
" D+ N2 L& O+ H8 s% H- t b" v7 F ask turtles [# [3 ~. ?5 |' v+ q( l# F5 w
right random 3607 s" @, o5 j* i9 \) e
forward 1
, W: n4 T4 [1 }: {4 F9 Q+ q F. U; M" y$ e6 e set energy energy - 19 p' `1 W; [+ w: ]
]" }! J/ R" \! }- n
end
0 J7 Z2 a; E# y2 Q- i6 b* g( r: Oto setup-patches8 i. |3 n+ n7 ` A" g, c0 D9 E, k6 L, p
ask patches [ set pcolor green ]
5 s$ \% h! r* G: p6 V, Hend
0 e9 T$ t0 {, J9 c- vto setup-turtles. ~' b) }' o; p. _+ G
create-turtles 100
3 y/ a% E) ^( A7 Q9 F- i8 w ask turtles [ setxy random-xcor random-ycor ]1 ~! z3 w# d0 f
end
6 A. s- T+ T' yto eat-grass {7 x' H& _( V
ask turtles [1 B9 S# t+ d' G0 [7 ?( @$ f" n
if pcolor = green [
# t# v; @* z! | set pcolor black
4 D B6 A9 p6 ]7 _ set energy (energy + 10)
+ W9 H6 i6 h& {+ G1 Z: E ]- X% F% y' d, V a) P8 f* ]
ifelse show-energy?
6 K( w7 v% W: \7 i | [ set label energy ]
, h( ]3 }3 {2 c+ H: g; @4 p [ set label "" ]
: A8 i4 T$ e$ R1 E8 ` ]9 X% s6 a, L; ]7 Z* L& R# G" p. D
end
# L h$ @+ a+ z' b' U W- tto reproduce
5 s: e, P/ _: v4 m9 \ ask turtles [
9 W# | C! r* F1 u& T6 z if energy > 50 [
2 o9 i" x$ H+ {, k- z set energy energy - 50
0 _; \! [4 `" v, F hatch 1 [ set energy 50 ]
" ^4 S ]( t3 S, Z2 b# S ]5 Q4 p# H S$ K# i: h8 I1 T( ^2 {
], E- i1 r! e: D" A+ f' @
end
/ e8 y4 S8 D9 h/ i0 rto check-death
0 W0 Q, @0 `- \% D' n( L* k: ~3 ] ask turtles [
* t5 o5 ^( r; @ {4 @, z if energy <= 0 [ die ]2 ^' z* K7 N0 N7 c. P% U; g. Z
]5 ^1 ], x8 o3 ^0 q5 A" Y; A
end
3 x4 B% ?# x9 F5 T8 [2 mto regrow-grass
* Y8 u% U" Y" @ ask patches [
; {2 C* G' ]* p" ^3 o2 X3 | if random 100 < 3 [ set pcolor green ] {' I8 E/ g5 C; ^7 F, ?& |# j
]
: D I+ j9 E$ r; ?' V+ ]end
/ p: F2 f+ M& G: M6 q, Uto do-plots
; S: ~$ A5 u/ z" J. X8 e# v set-current-plot "Totals"6 l' Z. E0 ]: z: s
set-current-plot-pen "turtles"
7 l; P2 t) I7 m plot count turtles
1 F1 A: K* R+ }! F* p x set-current-plot-pen "grass"
* w" q6 r: u+ i1 a$ `) ^ plot count patches with [pcolor = green]
- s' B& u. [, {# h& jend
: T; m) b$ d/ M1 q Q O可是运行时提示no such plot: "Totals") F0 g1 N1 v* G- u4 t
error while observer running SET-CURRENT-PLOT5 g, R5 S& Q! @2 F5 r9 ^2 h
called by procedure DO-PLOTS% g1 n* l3 q+ i' n
called by procedure SETUP$ d1 T6 Q5 R" U* }$ w
called by 按钮 'setup' O3 g, V, K( ]. @& ~9 t2 K7 p" S
求大神解答啊 |