我编的程序如下turtles-own [energy]
) }) j2 t# r* U; Kto setup% q" Z+ ^! ~. v* G: t
clear-all
2 m1 h5 U n: \ setup-patches' r# p/ V6 _+ Y& P
create-turtles 1004 g& D/ I3 ^! c' A: ]" b
do-plots
) o8 ]4 Y6 w% `2 Z* f3 x& ?7 i ask turtles [ setxy random-xcor random-ycor ]3 c4 C1 x! k5 Z. L! z* a
end# e j$ k$ _ \& x% K4 p- Z3 M* n
to go* [; R# x3 a& } [% p# R9 ]3 p% }* d
move-turtles7 C8 n; E6 y) b5 U/ q4 J. F5 ?8 H$ t
eat-grass/ h2 u( ~2 _. S7 Y$ \0 _
reproduce
% i- \1 Y. v" l1 ~, s" y* W2 Y check-death4 F, K x' u1 ]
regrow-grass4 y1 j; j' |! W+ R4 J* l
do-plots7 f+ v9 L% B( P
end! U: `) O! ?+ [8 ^# {& U- L1 }
to move-turtles4 d+ V3 X( S _. a) ]# _& a; ?
ask turtles [5 w3 P5 [" z" J I+ T w
right random 360) ]6 o$ t5 r) t3 F
forward 1. v! m8 H) O: ^4 V+ M* M
set energy energy - 1
% ~' O9 f: M4 T$ d ]
/ r2 q/ x% W# d* }- E& Jend
/ y6 y3 C$ k$ J d( `& R% J8 Qto setup-patches
b- |3 }. e: ~5 t/ y, U ask patches [ set pcolor green ]5 b1 X% x0 s( ]/ F! \) c' s
end) j& h3 {4 _* w0 m/ b$ K J
to setup-turtles( q( w: N- T3 A, E; }6 r
create-turtles 100
" p6 }: B$ J& e- |- F4 x ask turtles [ setxy random-xcor random-ycor ]$ m' `, z- P+ a( X# |. @) u
end6 W# a8 C' D2 s$ w9 ~
to eat-grass) x9 K' F4 y: v1 D2 P
ask turtles [
6 q: t0 c! P! G6 f if pcolor = green [
6 u5 S7 [/ R+ G; ^) Q! m5 @# F set pcolor black* E9 p; T+ v; E
set energy (energy + 10)
$ i: ~9 u* ~% G$ }# w1 d ]* C9 k) j$ b Q# g# p5 |
ifelse show-energy?& _) g. }2 n, e! L M9 y- [
[ set label energy ]
1 _) i4 s8 ]. ^ [ set label "" ]9 t/ N" e+ F% b* p p# u4 l
]! H' V6 m* b( A+ I% k. |" m
end
, N- x4 N6 c Sto reproduce2 l5 {& r- O+ ~6 ^
ask turtles [
% P6 w) ^. a" Y9 d8 y% p) n# _ if energy > 50 [
- M$ C- c% |' O7 Q: S* Z! K set energy energy - 50
& j! @% d$ b+ o j& T hatch 1 [ set energy 50 ]
c3 }' D2 Q2 | ]! ^( G" t& ~: X& G2 R
]
9 P6 u2 s5 ]9 j- K. Uend
$ ` f4 l) b+ j# eto check-death: c( Q! Q' ?. J" |- V, c
ask turtles [
4 c/ o& A6 i$ M5 ^+ i" H if energy <= 0 [ die ]
: ~3 d3 X; r$ s: S( z9 u4 h; D ]
2 N" r5 v! h: nend
8 c Z C+ g1 V a. c& ~to regrow-grass
# _9 |0 i2 ^ v ask patches [
9 t7 A6 m5 E7 h* Q% n5 r, b$ V- L if random 100 < 3 [ set pcolor green ]9 Q2 R, ^& s. k8 p5 x# a' a. `
]
$ U7 n: m: D& g0 Tend5 k, ?& t7 w! X
to do-plots7 t: w6 h" @' t# l. ^* J
set-current-plot "Totals"
; ^) @- k: c" ~0 | set-current-plot-pen "turtles"1 K k$ K k( Q2 f
plot count turtles- R, f7 L0 p- }7 l7 `
set-current-plot-pen "grass"
5 _. ^* \$ r( K plot count patches with [pcolor = green]
* b: ^( d# K/ zend, g7 q! T, }' u" x9 Z) ?/ u% i& x
可是运行时提示no such plot: "Totals"4 v+ |7 Y: j8 L# a- G
error while observer running SET-CURRENT-PLOT$ K' _9 F' d! @" e
called by procedure DO-PLOTS1 F+ o9 T z" |
called by procedure SETUP/ G0 u+ r9 x- p h+ {
called by 按钮 'setup'" M0 F5 K- ]. v# F
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
