我编的程序如下turtles-own [energy]# v- O! e# v; Z7 t; ~
to setup
) Z& u# Q; G ?8 W clear-all
# Q, Q& h" h. T+ |1 k6 C2 O9 i setup-patches
: l p. z! }/ K+ l) u" A create-turtles 1009 O; h5 y3 R& r; \ A8 L1 k( M1 T
do-plots
) }) E: R0 V% d. w ask turtles [ setxy random-xcor random-ycor ]
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to go
& ~3 M$ B1 @5 @/ v" S0 }$ G move-turtles% C; Z) K8 q3 c; t# D8 q" Q
eat-grass
s, |: T9 ^) s7 u+ o+ q reproduce% ]3 X5 s5 N7 t# N, a% _' J
check-death
! `! n# N& M, @* {) e regrow-grass
/ _+ z, ]8 J0 t; ~6 b) Q do-plots
) B0 a$ W6 j) Y9 L* i0 _, @end# E" S5 w0 u. w! _
to move-turtles. h" X3 l4 b2 p- W
ask turtles [5 ^. Y' ^' u' ^& H3 r5 p- N9 K; P
right random 360: ~8 p/ a: {: K9 q
forward 1
3 f) Y( q" ~, k set energy energy - 1& t2 U9 }1 w4 a9 l0 l+ p
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end
+ B+ V- a: T$ {8 \& k1 a4 ~- }( Kto setup-patches: V. G( @4 @/ J7 V0 G3 |* V' B
ask patches [ set pcolor green ]
' i O, f, _: J+ b, A5 _! ]0 Oend
- i$ |* M: T9 @: P, ~to setup-turtles; h; v" R0 w. y& [. A
create-turtles 100
" \" ]0 T2 p Y4 Q$ i: T% r ask turtles [ setxy random-xcor random-ycor ]" r0 ?# e [ K; j, h
end: R& |+ K- d/ [2 q0 G1 a# _
to eat-grass
$ K) U3 t% [9 }4 C ask turtles [1 Q( f- r. A, G% p* \
if pcolor = green [
% q. p% k/ X% V6 t% H set pcolor black$ Z& g$ X- E# h- |- V* O/ d
set energy (energy + 10)8 E9 P) r: `5 h/ K
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ifelse show-energy?6 N% @0 r9 a0 V6 e8 c0 } O
[ set label energy ]9 P0 [+ J4 V/ t/ F( }
[ set label "" ]
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end
- H- E3 ]1 S4 a3 [. E$ Rto reproduce2 Q5 K& ^; \1 \. z5 S3 @
ask turtles [, y9 l) W Q; W z! o
if energy > 50 [, G# `5 @7 s) Z& Z ~/ q
set energy energy - 501 q! e' X5 W7 h8 u
hatch 1 [ set energy 50 ]
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]
. \7 h7 G+ h2 k% y* `6 D, i M* mend
[, ?0 y4 K7 Q2 j, r5 pto check-death# |# |2 Y. g. M8 `" G2 Q% T
ask turtles [; i# F) f h1 R. V
if energy <= 0 [ die ]
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end
, N4 Y+ m8 {, e- Bto regrow-grass
/ s3 g9 ^& }7 q% K5 r* w3 ]" I ask patches [
6 y6 [; ~' r; W4 Y- f) q1 H if random 100 < 3 [ set pcolor green ]
. D' d4 d& f {- ] ]
. z; `" g5 R8 g9 ]end; \9 S: g: x3 p. Q
to do-plots
3 ~; P+ L, Y/ u8 \ set-current-plot "Totals"
" g; k& A: z8 e0 U* `0 K set-current-plot-pen "turtles"5 r$ E7 v" J/ }# g2 L$ K
plot count turtles
3 }" _( u/ { k7 { set-current-plot-pen "grass"
e' p1 W# C1 H n; N) g plot count patches with [pcolor = green], O( `4 N9 f' ` |. n8 L' q% |4 e' E
end
$ Y% f* O. ]2 a% C( ~& X可是运行时提示no such plot: "Totals", g7 j& ~: y; l4 o
error while observer running SET-CURRENT-PLOT. I! K) i. n* K) N! f
called by procedure DO-PLOTS4 {9 ? u: k2 q, w) \6 K/ {
called by procedure SETUP4 a- x* F& ~7 i+ K$ y, w
called by 按钮 'setup'
' Z0 i6 h3 v' S! N求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
