我编的程序如下turtles-own [energy]
( k* r# V" l. H8 W0 g' E6 g9 h3 wto setup
4 q+ b6 g# |7 T' ]% A! r clear-all( d# L5 j0 w9 ]+ l& w4 ~5 Q
setup-patches+ \- V0 X2 H& B, n4 K' J
create-turtles 100
6 ?# @" W/ S O. h: l9 P do-plots( z& {$ {% j- Q% @" ?! N
ask turtles [ setxy random-xcor random-ycor ]) ~7 a2 I/ P& `+ n
end% R& |8 \& A2 T, g
to go
% W# E. {4 Z" [0 x3 Z% @4 N. R move-turtles- a* }. j4 J! ~1 O! j
eat-grass' D5 a, n/ G. n& Z S7 g' A
reproduce9 m1 n) ~9 `" B6 R
check-death: \ \ @& ^' K' ]. c9 W5 V
regrow-grass
. Z0 p: R: w. _ do-plots
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to move-turtles' V" p7 m: Y% J5 P: Y x
ask turtles [
! A1 i: c6 u0 P3 E; I right random 360 p. s4 Y9 u1 t, V9 J7 d
forward 1( f% y; @% t8 \) l
set energy energy - 1
' V# e& F8 W5 ^' j! N ]0 i8 u/ E+ j# |- W" t' Q. u
end/ w' z+ ]+ X0 w
to setup-patches
1 k6 h) a# f% C- ~) ]/ t% K( A ask patches [ set pcolor green ]
2 g* X1 D( d' Uend* e% D, _# W, e& U* o
to setup-turtles+ G7 Z& Z6 b% c
create-turtles 100
7 G/ w3 h( \' n/ s. |+ x _9 S; h ask turtles [ setxy random-xcor random-ycor ]+ c# p6 s3 u: o: B1 P) \
end
3 w% k1 X$ l8 W1 h2 b+ B9 H) `to eat-grass
7 y8 Q7 R( Y8 _- R( Z ask turtles [5 l; n* B. z9 e
if pcolor = green [' W4 i0 `8 Z3 }/ `: L, b
set pcolor black
8 |9 [0 r) T: x* |6 g2 d set energy (energy + 10): d8 [% Q* Y; J, h
]* t# s* |3 u& a9 b0 F/ f f
ifelse show-energy?
; k4 @, G( y- p8 g1 | [ set label energy ]9 X) W3 m @1 M+ O4 }; K3 c
[ set label "" ]' u: E+ v, [* k. V' C% l7 g* g2 U7 U
]
" Z' n, o4 x5 `end" D$ A5 g, d! \
to reproduce
( v# \8 C2 X; F' r; A) Q) N. G) U. k* v ask turtles [
" p) z Q, o& s; T8 Y; { if energy > 50 [$ t; h" f) _6 ^- A T7 X$ K
set energy energy - 50
1 M c( o3 f9 F* Y* g hatch 1 [ set energy 50 ]
& Q S6 R( f' O, O) _( p, M: B ]
- b* x! a! b, o4 a) ]: a ]( M. \8 A4 V) c( ^
end' P- w# q" b9 Y/ x
to check-death
5 y. b8 k" }5 G$ n( L# m ask turtles [" K- Q% R& a" J" _, O
if energy <= 0 [ die ]
9 ]2 u R6 {+ u2 d0 s$ ?$ ^ Q ]4 i" {- T8 l, q0 m
end
: B |+ k* q! u' l( tto regrow-grass, b: z; x" D2 E/ w/ q6 n
ask patches [
# i4 r' e$ C6 }9 X if random 100 < 3 [ set pcolor green ]+ K) g9 x. V) H
]
9 K6 T! `4 ?6 Z, w+ x; y* oend0 c/ q! }2 p( ?# x
to do-plots) b& Y/ q* Q4 Z" C. S
set-current-plot "Totals"
% m- n- S) K8 e* T) w- v& N set-current-plot-pen "turtles"# l. H& }$ r: G5 a
plot count turtles& ~) N- E6 S" v* o3 W1 D
set-current-plot-pen "grass"
: c4 G3 I8 R- T) P5 J2 ~# n plot count patches with [pcolor = green]- F* ~8 v5 o8 Y" I
end& L( j+ l2 A, I' V" v
可是运行时提示no such plot: "Totals"
: S* s/ P1 }: [. {/ B- B/ U- merror while observer running SET-CURRENT-PLOT
2 O4 f* \- X; {2 r called by procedure DO-PLOTS
1 r' f5 k8 i$ G5 n called by procedure SETUP9 P; G( x0 c0 }! d. i& R$ |& q9 b
called by 按钮 'setup'8 b* r: q6 e, K7 D- |
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
