我编的程序如下turtles-own [energy]
2 x S/ I. c7 d: L5 V2 dto setup' O# m& H1 i$ e5 i
clear-all% i$ [' a/ W9 `0 K& o: |- B5 Z3 k
setup-patches% u U: D! x2 H S
create-turtles 100
" y# X, w* u" J do-plots
& w# z2 w% I0 L ask turtles [ setxy random-xcor random-ycor ]
+ @" @7 b: |. O% P6 r3 ]end
- E. o6 M& L8 F& Y5 Oto go
' h+ q7 Z, s2 n move-turtles0 W0 |0 k# v# g- p/ v7 v9 w6 o) i
eat-grass
2 |+ H* c& N( Z! M4 [3 l reproduce
) G& o# ^8 Z( p+ d4 C+ Z, K! m+ _1 v check-death1 v0 K: _" E8 I& q6 X4 W* _" f
regrow-grass# u9 h7 j, O; P9 M4 d
do-plots6 g0 @9 q- G0 F+ W1 |2 c6 _! r2 f
end
5 }! C {: m7 G& g# K* ]to move-turtles$ v" {+ B+ W1 j' D: a7 m' \
ask turtles [2 Y* N1 Z3 a: J; u- P. x. R3 o1 L8 K/ \
right random 360
) @) E9 K9 W8 ~' ~- k" w7 W+ ] forward 1
, r, F9 S7 W3 s6 f) i5 q, H set energy energy - 1
6 U# T- n3 E% B/ v* I ]1 {9 A1 r- Z8 E: P+ O
end+ E6 x1 V, V0 }4 T
to setup-patches
8 ]# v+ [# |+ j6 M ask patches [ set pcolor green ]
9 A& Q/ L9 o) |+ G, H7 fend
9 ]5 u& ]) P7 r( M, |3 C: `- F$ \( Nto setup-turtles
8 F& C& v; t, L5 Z9 b& q6 b create-turtles 100
+ Q4 f* H1 ?* j3 X4 p2 u; u+ N ask turtles [ setxy random-xcor random-ycor ]4 ^ n$ h( i' n7 X7 D( L
end
1 s# k& [7 W, h$ @7 E; m- oto eat-grass
: U* I' j+ [% i6 f ask turtles [0 D2 D% s7 E9 Y* i- {- Q
if pcolor = green [9 V+ h! j8 |9 r
set pcolor black
* `+ }; U* V0 A. F set energy (energy + 10); A5 I! h( o+ [0 |* ?0 K* U
]
1 W' a4 b: k: I ifelse show-energy?
$ p \9 K" }9 C8 j' T0 E5 F [ set label energy ]) j. G+ W' Q" L" M
[ set label "" ]
- U' [2 |! H: K4 `0 l! Z4 o ]' V) B2 l0 f; U3 V7 H
end
! Z# I, O3 [: W- H. I- sto reproduce
: W. r/ X% x/ d) k! { ask turtles [' @) s) I1 F, |" D9 {( w
if energy > 50 [( R& T# J7 Q' }
set energy energy - 50
2 _, X0 N8 Z" n hatch 1 [ set energy 50 ]
# G9 t; m6 t/ D& `: ]# ]# N ]7 R) E5 b, }4 s) `4 V* \4 ?" K
]: ^, Z, Y% T" _8 @" z
end
7 Z5 \8 R% N J' Gto check-death! y2 |4 l: d# v5 x' M9 {
ask turtles [) \1 c" U! O9 i7 v
if energy <= 0 [ die ]4 N5 f) v( w9 H. b+ q G2 C
]
& y; h+ Z8 w4 l6 s- b# W9 v/ c. aend
5 e1 z6 M( F/ t4 e' E9 w) T- x( mto regrow-grass
. j' p4 w. T* f" S5 K# V( h( [ ask patches [
* U: w6 q+ R$ O$ ^& ~ if random 100 < 3 [ set pcolor green ]
. |/ X1 p: d/ g' I# a+ Y3 ` ]
. Z' `( ?! a" m3 h" o" _( Oend
6 ^6 d6 e9 o' yto do-plots+ i1 q$ m! n' T$ F$ A% w5 a4 f7 R
set-current-plot "Totals"# Z/ ]9 v. A/ A. ?
set-current-plot-pen "turtles"
) W' F" }2 V- J( ?8 C7 J plot count turtles
, i0 G+ z6 \8 w# d set-current-plot-pen "grass" S3 N8 p$ e0 {9 T: M) x
plot count patches with [pcolor = green]
- B k: W l" q$ {6 u' Z$ ]1 Dend; U d& E8 m. `
可是运行时提示no such plot: "Totals". Y! w' g% D; r5 h
error while observer running SET-CURRENT-PLOT
- Y. t4 }; m" {& ?# M: {* ` called by procedure DO-PLOTS
# K! i3 }$ ], h( W5 M4 _4 h called by procedure SETUP
& F; j p' ^7 d5 B# E' O called by 按钮 'setup', `( J9 n$ M" ^3 A2 b- t
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
