我编的程序如下turtles-own [energy]
+ _+ I7 C& Y" I7 [4 E! Nto setup2 q, b2 T. N+ X4 R' a
clear-all2 B# \6 V1 V, _3 A* i# I Z# ~
setup-patches: {) O4 Q: E$ ?
create-turtles 1007 V' }! \1 p7 \/ H1 n1 m4 d
do-plots! O! y# d/ P0 F. _2 C
ask turtles [ setxy random-xcor random-ycor ]' U. |8 U( F4 ]* ~- s
end" b1 N0 X0 k# p! Y5 F) L. A
to go0 |5 N1 l7 O! u K' x& R0 z5 ]
move-turtles
: }+ A7 f; q) T1 y6 s w, F eat-grass
: m7 |: p2 S$ S reproduce0 U8 P- i v8 \) U1 R( k
check-death! j. ` B/ ]1 {! y! a
regrow-grass
) P) Q5 s& ^; W) B2 T: A do-plots" ]8 ^8 O ?+ N4 N: Q
end, R5 u6 L2 Z) T9 R% @6 c7 ]9 e) ^2 K
to move-turtles4 h: c" G. j) }- w- y9 b
ask turtles [
" X5 _0 R0 O$ a+ x/ D right random 360
& C- c* g& z0 d: W. Y s forward 1
# S- o' m$ z- N; a" u# J set energy energy - 1
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, s) ~) H' ~% d" gend. \+ X6 s2 p7 z0 u' i
to setup-patches8 L9 D6 }" A2 M1 A. n% f
ask patches [ set pcolor green ]& x# H( ?2 e+ w" u
end
, K+ p2 l/ Y0 v) B' bto setup-turtles! w& E9 F: \' s, l
create-turtles 100
6 x& l; Y4 R M: o5 p ask turtles [ setxy random-xcor random-ycor ]
# V$ r J; a# M1 j. e( ]end. V+ F0 m* b% V$ q2 ]
to eat-grass
3 h6 F' [/ n5 `( p7 d, d3 Y+ z6 a ask turtles [
) V( F, l( P; w- I' W9 ^ if pcolor = green [
! s0 J) _, k* u7 r' s% B) P$ `3 t# q1 L9 S set pcolor black: M" r! n8 \3 i/ Z8 \/ s
set energy (energy + 10)
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ifelse show-energy?* @) n) F ^$ m; g5 ~( u0 |
[ set label energy ]# f+ \/ A+ `: ]5 s/ _
[ set label "" ]+ @7 k, C. O2 a- w& _3 b k
]+ ~+ s; N- l; I3 C3 g U& I( ^
end+ A. j9 f) h6 I' N3 ~8 {
to reproduce
; P0 b0 U2 B& G1 |4 y' n% | ask turtles [
3 b0 w: l* M( K& K" ?: Y- k) S if energy > 50 [. W+ Q8 Q6 k1 ?7 X& J; q8 p
set energy energy - 50) I& H& y* r7 @6 d
hatch 1 [ set energy 50 ]
8 C( e2 I7 U3 ?& X/ d$ ? ]- M9 O3 v* T8 Q8 J5 O
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end
( V7 G8 V5 y! S ]3 rto check-death
* `7 E. {, K8 @ ask turtles [$ G& N. s/ t: {' o' f% {1 \
if energy <= 0 [ die ]. B3 h$ c4 w u! f" V
]
5 [$ ?! p0 d/ M+ _1 U$ g Yend
) y6 v+ S. X5 S5 v" o: j* Dto regrow-grass- k/ u( K. l9 ~2 K
ask patches [* o4 S! _. u2 p5 H0 ~1 I! e
if random 100 < 3 [ set pcolor green ]# p; t' G+ r) |; w( `+ E8 v X
]. ~2 \6 ?& Z4 b9 h: e; n
end
7 o5 E( a6 y' i i( ~5 m$ ato do-plots
9 l% i7 G# ^" P. U% i$ N7 y( H set-current-plot "Totals"6 i Y* @8 w, Z1 { {# y% X
set-current-plot-pen "turtles"% k: p3 t! K5 x6 t/ v A
plot count turtles2 p( b2 M" x1 J
set-current-plot-pen "grass"
- z0 }. k9 P6 w5 G: ^ plot count patches with [pcolor = green]
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8 r# ]: F. ^, I- D: R0 x可是运行时提示no such plot: "Totals") \4 I W) b P1 J; B
error while observer running SET-CURRENT-PLOT
0 m$ [* r, q+ s3 ` called by procedure DO-PLOTS: h# L& d+ ~$ @6 |
called by procedure SETUP
$ D+ q3 |% L8 @1 ]0 K7 \4 j called by 按钮 'setup'
1 A& o( D9 z: s, p: L$ s9 s求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
