我编的程序如下turtles-own [energy]
9 u. o* I8 w% l5 X/ w5 `2 Pto setup) t" K$ F$ D e4 Z. S
clear-all
% {3 s. q4 F. i, `+ ?) V; E8 h2 b4 w setup-patches/ a8 N4 M9 ^/ G& J9 H
create-turtles 100
+ j; w- H. Z: c; ^. g do-plots
|! ~6 o: b. m+ G ask turtles [ setxy random-xcor random-ycor ]
3 P' h3 F& L2 ^7 p7 }+ e: pend
e5 W$ [ m5 V% K; }9 G% G2 \to go
2 n( r# _- D& X move-turtles
6 z/ j2 y" ]9 }3 z6 D* x eat-grass' X# X" ^* p/ h0 E$ i% A
reproduce
0 M. C" `9 s+ M. N: a check-death
6 \& m0 g8 t# }3 Q, H) J, i* a2 S regrow-grass( [4 [( g" l1 N* Y# v
do-plots
. X9 f9 s3 S1 g8 oend5 f1 _% u5 ]4 f; Q J
to move-turtles3 l4 s, C5 w8 Y9 P
ask turtles [
2 z5 i0 E: U5 x3 w8 ]! M/ G right random 360
1 Z* h& [, m I0 H b/ O/ t: V forward 1' I1 w/ G0 f8 h+ v/ q4 O7 I6 X
set energy energy - 1
+ O& x) }: E+ w2 o) t2 H ]
x2 s+ g2 @+ M) @3 @& \0 Uend
/ K. R) |% B% I# l( m6 g9 m9 cto setup-patches
8 T3 f; L) o3 V2 A ask patches [ set pcolor green ]4 l* m% ^3 ]$ E1 Q/ Z
end
/ O0 L8 W# Y* W% dto setup-turtles6 ]2 Y- e( s) s, H
create-turtles 100: C0 b) R' n1 x4 Y, \5 }/ V4 u
ask turtles [ setxy random-xcor random-ycor ]
3 q3 K2 g5 G% T& h z% {4 mend
: S3 r$ Y- L: R1 d" z6 F) M' uto eat-grass5 B0 O, B7 [( Q1 N
ask turtles [
9 w4 L* r9 F) e; X8 c' n$ { if pcolor = green [# @7 T8 Q* |4 @$ x1 \/ b8 n
set pcolor black* Y) m! {* v3 ]9 g
set energy (energy + 10) N) \% t W* s) R3 [
]& f( t- K% A2 [9 H) ?- m3 @, z
ifelse show-energy?
2 t% P3 }( k1 K5 I; y [ set label energy ]; ?2 E7 Y \. _$ V
[ set label "" ]
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end0 W- `# M- q' |2 b- k1 q' u
to reproduce
3 Q4 w1 `- X% g+ p; c/ X ask turtles [
) F$ H' c, h1 R if energy > 50 [
8 D8 d$ x0 g; S6 O# O& B# H* Q6 A2 m B. ` set energy energy - 50; h* H7 j8 k0 x2 f& L
hatch 1 [ set energy 50 ]' Y( ~7 n# ]% b4 M5 |! R) u# [: B; c
]5 e( | l9 O3 e: O; S, H
]# P& s$ q4 F& p L
end
/ i. _( d ]( qto check-death' q! ]2 r7 N. K( z: E
ask turtles [
& h8 K+ c4 s7 Q6 Z4 Y if energy <= 0 [ die ]
) _; l) W9 T5 m4 t) }0 A ]
9 i2 a" ?5 K6 t6 T5 L0 _end
3 ?8 U3 U, r) u# V6 h# S! B) nto regrow-grass
9 O' p+ @5 R5 N) m& |4 | ask patches [2 j; p+ W* ?$ u& P) e
if random 100 < 3 [ set pcolor green ]
" N8 o3 x; n" c7 I- }5 W& Q ]
7 R o4 j' u1 V1 Bend9 @+ |. j! g! D6 R
to do-plots( N5 P6 Y# n) E# ~9 |: n) B# V5 h
set-current-plot "Totals"
' j$ Y: x/ h1 U- O set-current-plot-pen "turtles"1 z. }! S& _ k% ~6 P, N
plot count turtles n9 @( o3 T/ W$ ?1 {# a5 I
set-current-plot-pen "grass"/ n+ V. I4 F& r9 T: r7 T
plot count patches with [pcolor = green]
! ~4 ^" Z0 I" c( q# h6 _' Kend$ P6 o* R9 K$ w- b& {7 y, z r
可是运行时提示no such plot: "Totals"# x" e2 `/ F$ m3 }* A- _$ ?: S
error while observer running SET-CURRENT-PLOT* I+ Y* d% `. ]* H! E* P
called by procedure DO-PLOTS$ G& n& v& r0 v
called by procedure SETUP
; O* \2 X& Q7 T2 G called by 按钮 'setup'
1 }1 _( B7 g6 g# A, M. I求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
