我编的程序如下turtles-own [energy]
( M- c0 o) n1 Tto setup
( U3 e \/ l4 d* D" i, C clear-all4 p7 A, g6 n( E3 x7 z: K: a
setup-patches
' ^# z/ Z: `4 R, W s8 f4 ` create-turtles 100* U- E& D/ [; A+ l. |
do-plots9 {: E% O! t0 d; u: K& a% ~7 [( x
ask turtles [ setxy random-xcor random-ycor ]/ l" `& J& ]& t5 E% l S3 r
end
% I' p8 ?4 V( Gto go
4 L$ y- Q" s0 D" ?! J3 X8 x move-turtles
/ E/ M/ q1 t4 g3 t! p eat-grass$ f+ D* g, }! O+ M
reproduce
; z8 N4 t. D8 C5 h$ _4 Z% s2 u* q+ S check-death6 }: U! c# T8 u0 e5 }7 |/ A/ s
regrow-grass
! H% h/ l, S7 n+ f, q1 W- x do-plots
0 ^8 t1 f. [* t3 w+ {end
$ ?% o7 o* d% N E Vto move-turtles
! `4 ], B; x3 h* X8 T( ~ ask turtles [& h7 W. P9 }" H5 `
right random 3603 d! W& K. w7 g) F( b
forward 1
' K' ^' l3 _; j5 e) j set energy energy - 1. w6 H$ }! ]' F8 {
]
5 [; `7 ^+ `/ R; b4 Xend
, e# d8 y8 C, e0 Sto setup-patches
& J" @ K/ k5 h8 |% ?/ ~3 ^* e ask patches [ set pcolor green ]. v$ }: }; E$ ~; y2 w
end
4 c. z) t6 [- R' {to setup-turtles, w8 H0 r9 ?+ y
create-turtles 100' h& B9 G% D' t6 s+ j) p j
ask turtles [ setxy random-xcor random-ycor ]
4 F5 O" E- O2 t! z, v' ?8 \end' l$ [# T* w* z) V# e5 {
to eat-grass9 x( C9 s) W1 V
ask turtles [' P. M7 j" P$ U# w( Y
if pcolor = green [
2 T/ t( f7 _4 H. O; g* V set pcolor black: H& P. s# O) ]( X5 p7 d$ Q
set energy (energy + 10)
2 z3 y& ~2 B- a5 N6 e* B7 N5 m ]* ]" ^# c: }2 H+ u
ifelse show-energy?2 C& \( a/ @. J/ K! G
[ set label energy ]
- d. Z. v( g" Q- y [ set label "" ]
7 {. D% p* K6 [: J/ N! u6 ^9 ]" o ]: i! J, e2 t2 l( Q' i8 A* _
end
7 U' n5 L* F9 @$ p( ato reproduce3 ~9 h4 I& u" Q: c* z( A
ask turtles [4 w+ \+ N; D7 H# [' [. o' ]4 Q# a# r
if energy > 50 [5 |' a. h- ^) l
set energy energy - 50
( a' W2 p5 r! i, r hatch 1 [ set energy 50 ]! x) ^+ m+ d f
]% t* p4 [+ _% g( |0 T" u
]- i1 d& e" O- K; t2 ]
end6 O l% G. s2 i
to check-death
# M1 M2 e9 w0 R! P) V, e ask turtles [
H* V/ j' H k) d if energy <= 0 [ die ]4 G; M. y4 |7 c
]
5 O% H- Y1 Z7 p, }" \, Dend; ~7 ?- J, G* w& a, i! W* X& H
to regrow-grass
* S1 I6 G" V# P; |/ G ask patches [# g) m3 y, c! s. b, I+ U+ C
if random 100 < 3 [ set pcolor green ] y4 y: M. L5 O0 Q
]2 c; m/ C) @9 P# h! A- g: [0 [
end
7 |; U0 v( P, U$ `2 u8 Xto do-plots: `) x* Z; Z, C+ U- O2 {
set-current-plot "Totals"" [2 ?7 |1 P5 |( C' r4 t; }) S; t
set-current-plot-pen "turtles"
; ]0 _$ Y! R. W' { plot count turtles. O `" @# F' { A
set-current-plot-pen "grass"
x8 p+ l8 I) o- e7 [1 D" e plot count patches with [pcolor = green]
2 F' y, Q# X8 Z3 K2 nend z' }! c4 X0 ^9 w7 B
可是运行时提示no such plot: "Totals"+ `# p5 e% C) N u0 h# \. z: N0 B: F
error while observer running SET-CURRENT-PLOT( c: C ~- ~$ ]4 U( u) w
called by procedure DO-PLOTS
" d2 U5 I% Q* j) d called by procedure SETUP% j' j9 E. n: Q9 K2 X
called by 按钮 'setup'# Z) o2 N5 k* H0 n) ^! g% f! O
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
