我编的程序如下turtles-own [energy]" t/ P. V( I( p0 }& {
to setup
: j! I% Y# E5 Z; O$ J9 S' O clear-all7 D w. ^- t/ i j# ?: n) K9 l: G1 ]- c
setup-patches
8 }9 V! b5 |) g' M- Y4 K3 q0 i8 C create-turtles 100
# ]0 J$ [9 ]2 `& H; Z do-plots1 Z0 A" }' u3 S/ x5 q- X
ask turtles [ setxy random-xcor random-ycor ]
5 }; { P- o. V$ E8 Pend; Y- o" F* ~) O: O8 f0 P
to go. Y" E, z0 K: C# s! B4 { `7 Y; y8 V
move-turtles
- ^) U# S3 s6 S( D3 L, F+ K eat-grass1 T+ f2 O# u. I" {' x' T' U
reproduce P" V( b* N% n8 z
check-death
4 G8 C! u3 I/ ]) c/ B. [5 r regrow-grass+ S) X6 z" r4 i2 P2 ?+ O2 \
do-plots& |$ f$ H3 _9 y
end9 E, W9 g* \, r/ l; J
to move-turtles, D- w6 T3 W- {
ask turtles [
7 a5 t' E, a" H right random 360* Z* U) v6 T1 b6 f- }, J! O
forward 1
1 T, y1 |: d( F- Q7 y9 `& S set energy energy - 1
M3 O, Y F8 N! P; s ]
! k* U/ u- u! P/ N' F3 oend9 e$ D3 y6 |& |2 T/ j3 |. \
to setup-patches
' ?6 p# Y* U% m+ }6 G ask patches [ set pcolor green ]
# K5 T' S3 `! i4 m' qend& d/ D8 s, }+ N7 m% q1 |, a4 k
to setup-turtles5 T# E) M, O2 T8 b6 q% r' a5 Y
create-turtles 1000 {! S& m+ A, ]6 N
ask turtles [ setxy random-xcor random-ycor ]7 V$ t. `) w0 w/ P- P1 z5 x7 e& h
end" ?- Y3 D. {# h* T2 T P4 ]; S9 o
to eat-grass
( i8 q: y* C- z ask turtles [
; N3 s) [5 J M$ z if pcolor = green [& _3 }1 l6 B: g4 w; @9 r- F/ @/ l: i/ i
set pcolor black
4 N% T4 G" c% k( U3 [ set energy (energy + 10)/ C& J; S" k$ h+ U3 M! Q
]
( M c, T! G$ i0 W% a* @. T" B5 d, Q ifelse show-energy?
# N' O# m6 y, t7 s' g% a. ] [ set label energy ] _& K' X$ {# U+ ? e) X
[ set label "" ]
* O* I1 Z$ o1 U$ @ \& `. ? ]8 Q, E) b4 K7 W. ~+ E% w
end
5 I& R9 @/ J0 F Gto reproduce2 v1 K6 l+ ^ v' W: ?: s8 j
ask turtles [# C) t2 F ^* B1 o
if energy > 50 [
- I8 d( {- R# {& n* m6 n. ?5 k set energy energy - 50# @7 y- k# U0 g% |5 I4 }
hatch 1 [ set energy 50 ]5 w L* |6 T; r E
]0 [4 Y6 S5 W9 c$ \0 y
] d/ b5 [9 @2 b+ i+ `" v
end: t& N9 W8 `( x+ {: M
to check-death1 |; [9 n0 f, m% A9 w; z
ask turtles [
( i6 l9 W( H8 \4 G: k7 H) P/ s; p% T if energy <= 0 [ die ]0 Z L2 h( G7 z& v3 Z: w. A
]
1 S( t* C6 s+ u' I7 @end$ r2 s/ j/ a% v" ~
to regrow-grass
- F) c8 n9 F3 A% b ask patches [
' J: Q O C1 {' | if random 100 < 3 [ set pcolor green ]! G0 K8 m4 h, ]$ w2 `$ f
]
8 @9 E: ]" {, g/ w' ?" ^/ Wend& r& {3 \/ v# ^" l! o) t
to do-plots+ C# O' {6 g$ ]6 a/ ~/ X2 J$ f
set-current-plot "Totals"
* [( w0 S, N, e( P1 @* o" w: c set-current-plot-pen "turtles"
- n3 P- v# H1 V, B8 b: v, L plot count turtles8 v& h% b' T" G, |; Z/ T7 X+ Q) S
set-current-plot-pen "grass"1 V4 B$ T/ e6 x4 C3 P, T
plot count patches with [pcolor = green]
1 h7 v9 o! F" h. M ]3 }end
! g8 c; [* f1 I, _8 W可是运行时提示no such plot: "Totals"8 E& X0 T6 M, ?3 D" ^# e
error while observer running SET-CURRENT-PLOT; C4 [) T; v; S. y
called by procedure DO-PLOTS
* D" ]- S9 T1 ` S) p5 j* \ called by procedure SETUP
7 {% E9 e. b# Z7 `& f2 A& p called by 按钮 'setup'5 t+ U+ Z( U" k- M) D2 A$ ^
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
