我编的程序如下turtles-own [energy]7 r! u0 `! H: _6 k( U5 i+ U& E' C
to setup
! J. r0 B& E, `- G! C clear-all
) B1 W* B/ D* r6 J0 ^$ T4 E setup-patches
( c% d D0 \6 \" i create-turtles 100& [% O" [2 ]; u3 c$ Q" l
do-plots
5 R. Z, J6 r/ g. \4 ]9 A' ? ask turtles [ setxy random-xcor random-ycor ]
9 J- S T2 @2 Hend
; s8 a7 q4 m) N8 A. @to go
5 ^. l, b: _2 ~ move-turtles5 E1 Z9 n0 F7 ?+ J3 {0 e
eat-grass
8 ^/ d0 y' @, G reproduce
, B$ |8 D3 A4 i check-death
) H* M. e y; b/ z& `4 ~8 `5 Z regrow-grass, w: g2 i2 V* x5 b2 ]: V u( n
do-plots3 Z6 ^8 H8 ^7 C% {% O7 j
end
3 P, ?1 P0 F7 I5 a: T; J# Lto move-turtles
, ?2 A9 l; Y- S r6 P) l ask turtles [( J6 @! C m# t) w' c
right random 360
; E# G. p. ~4 m# ?* @ forward 15 S; v. J) ^' A9 d! ~
set energy energy - 1
- {1 B9 l$ F6 I6 {8 W- F ]. J1 w: V0 o3 A0 ^, o# v
end. g# M, j4 N& i+ C/ L
to setup-patches9 [. A, w: `5 p5 N" Y- B6 J
ask patches [ set pcolor green ]
1 p0 O. N) X# ? F" u: u. J* p+ |end
: \$ q; P; C0 P' mto setup-turtles
! K a$ Q" q; \ create-turtles 100
. B2 Y7 c" C$ i ask turtles [ setxy random-xcor random-ycor ]
( a1 A$ P' N! |# {/ ?7 oend
' e" N' _5 s2 xto eat-grass
# C; m* P( B$ C! N) v* j ask turtles [
% N! d/ T `( I% f7 J$ P( s if pcolor = green [# ~1 v$ k' p6 e2 x3 q2 y8 P: ?
set pcolor black! O% X4 N- B% B8 t
set energy (energy + 10)
3 N3 O( k( a' E" [! _4 t$ Z" h ]6 h2 X! n# E# X0 F; s$ V
ifelse show-energy?, K1 T3 f Q: P4 n0 B
[ set label energy ]
' z5 u: Y- t2 e9 H% m+ @- p8 F+ W: A [ set label "" ]
/ ~- K% P. u/ M5 S ]4 P+ e! ~& ]; [* l( f" J# X+ i8 f
end) h1 z1 L5 C: B! J) u- E
to reproduce
?, d0 N/ v. E$ W' a ask turtles [" d _, X3 T9 V9 Z" I% I/ E# K
if energy > 50 [
/ M4 p/ S, Y, a- f4 U' V set energy energy - 50% z( h2 `2 X7 B9 s
hatch 1 [ set energy 50 ]: v- }& f @4 C3 C+ c
]
& C2 p$ ~6 P. [5 c; w3 H ]
# y- f; N ]; d1 gend( O& Q( v3 V P- R
to check-death: f% n" a4 y5 _# e) t* }9 c
ask turtles [
6 C! D& N8 U6 N* R2 ~/ h if energy <= 0 [ die ]
, O* `6 c% x" r- [+ ~ ]1 T5 w* P9 l: _0 f t3 @' Q
end) o( S8 \( Q& \# r
to regrow-grass
, V, m7 [& [( [6 C) [9 O6 h ask patches [. \- h3 A, Y2 g+ D- ]# C5 ~
if random 100 < 3 [ set pcolor green ]
: W% Q5 h( ?9 c0 j ]+ N# c }) o$ C: ]
end+ f4 q7 M1 V5 R' e3 o
to do-plots
( v& k: h6 `5 \; y( d/ I. E set-current-plot "Totals"& n' ]. g9 Y7 @, O8 J, G
set-current-plot-pen "turtles"
9 p7 v8 l! `' |3 E- ^3 s& Y plot count turtles
( f9 a% }3 f% P set-current-plot-pen "grass"2 o1 Q# f6 u7 V9 d* r
plot count patches with [pcolor = green]
6 S% Q9 a7 I+ b) X9 D6 T/ u; }& Hend$ u) n% o+ D; H/ ^7 \2 S
可是运行时提示no such plot: "Totals"
2 P8 d% V$ @# e9 s3 }& ]error while observer running SET-CURRENT-PLOT
) [& H7 D& Y1 m! w+ W called by procedure DO-PLOTS
( _% J. G. o0 v# z3 O/ ?7 k$ o called by procedure SETUP; Q. Q- o O7 Q* D
called by 按钮 'setup'
3 a* r2 g) W0 y# t求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
