我编的程序如下turtles-own [energy]) u/ @$ H0 |% m X
to setup3 q6 v; `% A% g
clear-all( X; f; D1 W0 T
setup-patches. r1 \; l5 t" B: V
create-turtles 100
+ ?( w t0 w& K' Z! w2 w) x do-plots
" K2 n) B5 F, e) I ask turtles [ setxy random-xcor random-ycor ]6 ^: ]9 I' M' B4 {4 Y# L6 r
end
; y5 B }9 Q- ^% {9 q& p/ g3 u; v4 Hto go2 `$ j5 r; ?: h
move-turtles& s) F1 t4 y- T! P
eat-grass
$ y6 k2 i9 `4 q reproduce
1 A1 V6 Y9 j% E) G check-death
! R }/ v! p' }8 a* {% y regrow-grass
% Y+ {$ i7 c& z1 a do-plots
! m( J* [% c8 `8 b" Z7 send
) M4 \4 t |* {! v; d& dto move-turtles
* P' w1 s6 N) v- V9 H; ?. @ ask turtles [
. P& z' }) }6 T3 L0 m right random 360( w. d1 `2 f0 B1 [* B/ S- M# e; w
forward 1
% J! C# K' m& W5 B& y set energy energy - 1
" \' I6 d5 p1 C9 k' z ]5 N3 M% {* D ~9 l. n
end
, I1 M2 U- e3 {: Wto setup-patches2 D3 @2 A) q7 L) n7 _
ask patches [ set pcolor green ]
. @, ? H+ r9 D1 E) d# N' |end
1 T# |. @# v9 z$ jto setup-turtles
! s9 l7 D# A+ W create-turtles 100
- O1 h0 Z) H, d& f7 { ask turtles [ setxy random-xcor random-ycor ]/ F0 B& \4 {+ R. s# k3 |
end; I" W) B8 G& ^3 w4 P( }
to eat-grass* W$ T1 `8 s5 ?; `
ask turtles [5 S9 S$ B8 v' G6 `
if pcolor = green [3 V' }/ E9 Z3 o6 x( Z+ g# a$ U# B
set pcolor black
6 K* h r& x D/ s2 l set energy (energy + 10)
/ S. d# L1 U* E1 r, F" ]' v9 R ]5 D) X! m, ?" j8 G9 i% r
ifelse show-energy?3 I& r o S% ]+ W/ O
[ set label energy ]. f @7 i8 K# r+ ?! C4 x2 p
[ set label "" ]
$ \% V: }7 @& g0 o! E ]! n1 q( V- R5 O n; ?+ H4 O
end
: J' e9 H7 W Q7 ?to reproduce
% @: c0 U; |8 T% e) q7 E ask turtles [. ?- r# B5 ^3 T
if energy > 50 [
* Y- V0 y2 q V7 c1 l1 i" @ set energy energy - 50
! ]6 w$ P. n/ x# G& j9 ]) q( ~' f hatch 1 [ set energy 50 ]
# |+ t, g/ J) n0 l! D' p ]
# ?0 [5 O4 G/ W+ T2 ] ]$ d2 W0 U2 `! l- V3 q1 R
end
2 b5 R- B+ n: F% s. xto check-death
* G2 F1 g/ T& m ask turtles [
* p" O' Y$ t( y& F. H7 a9 o if energy <= 0 [ die ]
3 Z' s4 D9 L8 f( A- g ]& s( l8 d4 O2 H$ j/ B
end
: |: ?# F! U+ [to regrow-grass! {& }& H; A/ \/ |& l- R) h
ask patches [
6 {2 j. O: v" ~7 B8 ^ if random 100 < 3 [ set pcolor green ]3 t7 w X6 c4 W! {+ w' J g5 `
]
" U% l! S9 _; B; \ |* Uend9 H! c% W: N6 T/ J5 l
to do-plots# p# w; p9 Q, `" E0 V1 u" W
set-current-plot "Totals"
$ h9 H: C: d; t6 L* P3 Y set-current-plot-pen "turtles"( J8 D( w4 ~$ d ^* k: p
plot count turtles/ E+ v, x/ {- v8 j
set-current-plot-pen "grass"+ x/ P8 n+ C3 a$ e% g
plot count patches with [pcolor = green]
" t6 x4 H* @9 oend
m: R: j; |% b' i5 ^可是运行时提示no such plot: "Totals"
/ n* }+ R2 v- c0 D9 C) S* [" [( L/ aerror while observer running SET-CURRENT-PLOT
$ w; Z; h4 {$ b called by procedure DO-PLOTS4 f* Q! }/ e3 Z1 n) C
called by procedure SETUP
2 K- d- u i" O; r( ~( j `$ P2 D called by 按钮 'setup'
) z. \# P+ P1 ^& ~8 l求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
