我编的程序如下turtles-own [energy]8 y1 l! C8 [7 \5 t5 r! h% T4 C
to setup' W2 O: x$ P- G; _. }" R
clear-all5 o( C/ z' O7 l- L/ K# {! p' r
setup-patches$ L1 j* b h( z# c
create-turtles 100
' T1 B4 } Z% K3 L. a z/ i% l do-plots
3 O( `: A# M% z5 E6 p7 z: d ask turtles [ setxy random-xcor random-ycor ]9 A3 Z# n$ M, D+ ~" E; E) b9 h6 |
end
% c2 a$ _7 e5 O! X( qto go- [) F5 X+ H1 `; t
move-turtles
, I- h, k% x: S eat-grass
?6 e1 y6 K$ n, n0 V7 w reproduce. J& _5 f, d4 w$ W' a2 b9 k
check-death
) j, M$ H- L4 V" N. t regrow-grass& F" \' h; W" L% S7 a: c0 c
do-plots/ S: s9 X; c: b1 N2 e3 B) O- Z
end
7 e5 @" J4 i* wto move-turtles
/ l5 d7 w* J$ R2 B: c ask turtles [
% u& c' a4 M, y6 i5 y i right random 360, N- M9 I+ }5 h9 d7 p) |" b
forward 1# ^% }7 N: Y0 t2 ?8 N& g) ~
set energy energy - 14 G# t' g6 e- B; u# a
]
; q) E6 C% r" S: j& Vend
0 P6 _" l% |( `- Q( ]7 zto setup-patches% S' W w s2 H0 F5 K; Q5 ~
ask patches [ set pcolor green ]
" [. _9 h/ T9 G: Aend
) {3 F/ I* [/ ?. Lto setup-turtles
) ]+ A( d" b. c' X) H! V) F; X, ^ create-turtles 1003 {4 e# T6 e6 D
ask turtles [ setxy random-xcor random-ycor ]
) Z R* b; I$ _" b4 Z: C* y7 oend
8 D3 x1 {: [- C8 |3 I. ^2 eto eat-grass; L7 i; b. g% |7 j
ask turtles [
) S* m1 |. n4 s: q3 ?7 \" z0 C if pcolor = green [
6 K0 {7 j6 T/ {5 Z- r set pcolor black7 D8 U) o8 n+ d' W% g, u0 W/ J
set energy (energy + 10) r8 Z# {! V' W
]
5 K4 I' A* O9 t8 e( A ^ ifelse show-energy?
8 n' S+ Q# T' {' W9 J [ set label energy ]
, r( { r* v8 k- `( L [ set label "" ], V" \, Q9 E' v) }& b9 I
]7 S2 s0 ^2 b8 R9 {) z& N
end u" p% C/ {3 A0 t0 S
to reproduce4 R+ l U' Z% ^% q' ~
ask turtles [
4 Y* R& q! K" B; k4 h' w" O if energy > 50 [
# Y' @9 A2 K7 g2 F$ f- [% r set energy energy - 50
9 {- P2 z4 {& i5 g2 q hatch 1 [ set energy 50 ]
4 q0 B# Z: _3 C9 B8 m6 T: M% v; \) _: ~' u ]1 I& p6 h( |7 G0 z1 [ v
]
( L2 ]9 F2 T1 f/ a4 Wend
; m+ m/ `* Z+ a7 Dto check-death
9 ~+ {! z- C3 u( {& g# V ask turtles [4 }9 i K6 }4 Z) `5 |1 `3 M
if energy <= 0 [ die ]
5 |/ a) h7 K: w% R( w! s9 O ]
w( ]3 P4 @ f, @3 H: O5 E5 j8 dend* k5 D' h4 g9 y6 U( [' _; m
to regrow-grass* `) h' V8 x5 r- c9 i; q0 `* c5 m \
ask patches [6 r6 f3 v: H# r h0 D
if random 100 < 3 [ set pcolor green ]
0 T v( h9 T0 D( m ]
( ~6 K7 g U- [* B4 Eend; S& m$ T+ l8 k8 @
to do-plots
9 q, d- c4 b8 _8 I5 @. u4 l( m set-current-plot "Totals"
6 _ L6 x6 V! ^4 _) l8 Z set-current-plot-pen "turtles"
: y/ [+ u9 K0 g3 j; h5 U# D( X plot count turtles. Q& x2 V* l2 u! o
set-current-plot-pen "grass"
3 p7 |% z3 G( m4 W plot count patches with [pcolor = green]4 w' a* c% a# m; o' D! q2 j. C
end
& q( O" [; P, ]; X' I% v }可是运行时提示no such plot: "Totals"
+ N9 Z# B2 D M' e3 Rerror while observer running SET-CURRENT-PLOT2 A1 F. v, r) Q1 F$ b6 [
called by procedure DO-PLOTS
& l/ P9 x+ R# N' ?+ r+ g) q called by procedure SETUP6 b A3 S' A, K+ r% y& x
called by 按钮 'setup'
3 r5 u5 j2 z: g6 T8 L求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
