我编的程序如下turtles-own [energy]9 ^# E) @: p/ q+ \ P
to setup B' Z% x+ ~$ Q8 d( W3 n6 A
clear-all0 ?+ c8 P9 m; r/ q) |) \
setup-patches
+ M+ G4 c1 w' F% Q7 S2 r$ s- X create-turtles 1004 k8 C9 h, f5 c- Q
do-plots, [# j1 M: c0 \
ask turtles [ setxy random-xcor random-ycor ]$ [ T) }* M1 Q
end
; s$ p& ]$ q9 q- Q1 P! c5 Ito go
8 U' d8 G B, r( } move-turtles
+ c3 \: A, x# X5 U eat-grass' x8 e1 M) c, F3 @
reproduce' J; Z9 m' ?5 X% @" [: s# L
check-death
' [; _( ]% e: [ E q regrow-grass F# M/ Z0 p1 @% @% @
do-plots+ u; J2 N0 }/ h3 b
end; _' `' d; W& s/ H
to move-turtles
P* R1 a$ \+ b2 w, }' \3 ^' _+ U ask turtles [
9 G. h; P- @0 S- I% g right random 360
+ ?7 f9 j9 F$ r* d: { forward 1
! B/ v. x/ R2 K set energy energy - 1) z- D, K7 }$ j& h) k+ K% u
]# Z) `6 J9 B! L0 B
end
0 D- w5 y: E: T* nto setup-patches+ P4 D: f7 }4 U- L; R
ask patches [ set pcolor green ]
6 ~4 Q: d+ X, s% Rend
) m3 J* O! ^2 C4 @5 V- kto setup-turtles, H$ f& }6 e- M9 {" U$ j+ G
create-turtles 1005 k& J F3 F k4 ]/ g7 O
ask turtles [ setxy random-xcor random-ycor ]
9 u; X# x0 C6 ? o) |end+ \; s5 ^2 X1 F* T
to eat-grass
' D+ n: ?" m$ K, A3 {- \ ask turtles [# s6 }0 l, E0 B' o4 K: A
if pcolor = green [* n. C Y, x% A3 ^) s# ^, {
set pcolor black5 @7 X1 {, G0 ~0 d( {3 K
set energy (energy + 10)
0 ]* c( P# R o5 e* `* A4 D( j$ k ]
# Q5 \, R0 `1 u ifelse show-energy?
" d' N4 Q7 r$ v: S# ?2 W) v [ set label energy ]8 _& d, J' r* x; E: x
[ set label "" ]# g& _5 v- M0 o0 g! @
]& C6 V) I, b3 Q# f
end
( R# ^' C1 d4 ~ r# d$ S' Gto reproduce: [; O0 N5 N/ s. h: Z8 S! v, ^" T
ask turtles [6 P' K' k; G: L9 e+ C7 }4 G% N
if energy > 50 [* T2 N$ G! d8 K2 T7 F
set energy energy - 50. B1 Y+ I) U* w5 ^% m* ~) q
hatch 1 [ set energy 50 ]
+ b8 M6 A5 c$ T+ J( j( h3 ~ ]
* g1 |% r3 f) d; x( g# N: D9 Y ]9 |$ h9 L! g: [) I* j
end
9 o( O4 ]' C$ `8 O. z* pto check-death- m8 h3 Q$ P1 N1 s
ask turtles [
# ?4 N- n: a4 [2 }; {) @; j if energy <= 0 [ die ]
5 ?/ ^, L: Q+ P ]
+ F: W5 F6 N3 b( A' p5 s# `, B3 q6 \end
; }1 S# z1 b7 c/ a. \to regrow-grass3 I3 ?: X( E- Q' n: v2 |+ p
ask patches [. k. T- q/ w+ E: x+ P6 Z
if random 100 < 3 [ set pcolor green ]
B/ E7 n' O: ^- `3 B) l: P) i ]
; Y$ f# G @1 u# k' Eend
$ l a) {% U8 j6 vto do-plots! }+ ]5 P Q6 N' w* V5 d* B N5 {
set-current-plot "Totals"
9 b. T- B+ e$ l3 \ set-current-plot-pen "turtles"& k5 E4 n5 x9 s
plot count turtles# |" R$ j# j1 B2 n% B0 B
set-current-plot-pen "grass"
# i. x6 X0 G+ p4 v y; L2 Q plot count patches with [pcolor = green]( G7 d. ^, B" c/ u' g/ N
end
8 c' a0 A a1 k7 i- A& R可是运行时提示no such plot: "Totals"
9 c' o+ P' z8 G5 I ]error while observer running SET-CURRENT-PLOT
1 D& B' }/ l/ s1 v4 I) o) C called by procedure DO-PLOTS+ C! [) M1 o& D$ W) b. H
called by procedure SETUP# G: b- H6 Z) \- d0 o
called by 按钮 'setup'0 h/ j4 f4 W; k' t1 O2 C
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
