我编的程序如下turtles-own [energy]$ f! w/ f4 b& r4 s- S2 L5 n
to setup
7 |( X* [4 B/ x( N. g! s clear-all9 y' B1 H: P# _! X5 ~6 Q
setup-patches
j' Z7 c5 V1 l8 S' J create-turtles 100
: S. m" V. W6 }+ n6 p3 f8 F w do-plots) ]1 a! X2 c* \- _2 |0 V
ask turtles [ setxy random-xcor random-ycor ]
$ }9 d# p. m k) V/ j3 Xend
( w, a0 B; S7 h) Cto go
' ]% D+ P! Y5 N5 U- V6 [ move-turtles
6 {8 H9 c* P, Y8 j eat-grass
! X+ L) m# k) { [7 _" M9 i6 A reproduce3 J+ }4 A' c- F7 G. B, Z, p1 Y/ a
check-death' @5 y S* C( n) c
regrow-grass
: S7 n$ S6 }; T1 }& i do-plots, { X8 k- D/ C, s9 m; A' V3 a& I
end
; b- y/ l8 w4 Yto move-turtles
" S- l" N( K2 Z0 o ask turtles [
w! c% r% [( \! ^ right random 3602 N6 E7 m1 {& G9 I1 F5 P! _4 B0 f
forward 1+ Z7 E' F6 d. |% H! W$ |0 P
set energy energy - 1
3 Y" }& g" l" J0 d4 _ ]; R4 W8 d( {' X" B U- s" ]
end
1 y- V5 ?( h+ v- V9 ?# lto setup-patches( ?; y8 n- [/ O
ask patches [ set pcolor green ]1 u9 j/ v9 ?4 P- t
end
8 m2 o0 P6 T7 \* t9 H/ ~to setup-turtles
/ \/ [4 A. ~ G( L0 W. O create-turtles 100
Z) P( ?. d9 v ask turtles [ setxy random-xcor random-ycor ]2 B$ J9 B) M0 B$ j' V' M
end' S4 D9 [$ i1 X8 b# U8 ^+ g- D% A$ l4 a
to eat-grass& R4 `2 M& \/ b, ]( J5 Q( f
ask turtles [% ?/ N" y* c4 @4 t
if pcolor = green [( L' C3 D4 C4 C
set pcolor black
& a# N3 @0 K- y7 M- I8 i set energy (energy + 10)8 D8 l+ ]1 v3 ^- P
]
* \5 X. s- s, C* d/ N" ] ifelse show-energy?
% l6 E" _7 `! b [ set label energy ]) u2 _! `4 D8 _) K2 o! P
[ set label "" ]! Z) |0 t* }) }) L
]6 X9 K! O) _1 P, ]1 X( s5 S
end$ w' p/ N% @, @( N
to reproduce( [- o8 T& C* a( y
ask turtles [$ h3 E$ Q7 q- W
if energy > 50 [
P- |2 i; }: }" k- L3 e set energy energy - 50
4 R7 {# ~* N) y& f* v0 P; S hatch 1 [ set energy 50 ]
* d7 m/ x$ R: h7 O. S ]
) w% L6 W) ]4 A% L% ` q ]& N% P+ W, t; n
end1 d; m1 G% q- O4 S; F3 P$ V+ R( q
to check-death
% j& Q5 N0 I2 [9 N g ask turtles [
; X0 A) }) ~( S# J! Z if energy <= 0 [ die ]; m0 G$ ^0 x" s3 k/ r+ T" l- J9 W
]
$ T# w5 ]/ K1 g9 w' \/ vend
, e5 i% p" k% V, K Tto regrow-grass4 F2 R# U0 T; y6 S
ask patches [1 i7 |. U O6 P3 z5 M1 n8 [
if random 100 < 3 [ set pcolor green ] L! B: J( [; d9 }; T6 k. d+ y" {! `
]0 n7 R1 W2 j# v, ?
end
+ K. h! B ?/ G) Lto do-plots# @& f3 v) T% }, w9 H
set-current-plot "Totals"
: C$ O+ E9 E: _1 W& n) h set-current-plot-pen "turtles"
7 k( V' ^5 O/ Q- Q' ~7 `/ v1 Z& B0 J plot count turtles; j8 B# C7 m+ B2 {3 ^
set-current-plot-pen "grass". V, p: g7 o6 g( B5 N6 R
plot count patches with [pcolor = green]
( S2 I( G9 C$ V, i3 Vend9 ^- M+ G- T' {, Y0 d- s; f
可是运行时提示no such plot: "Totals"0 L ?8 C m3 M4 x# ?9 B
error while observer running SET-CURRENT-PLOT
: ]$ E7 V6 X, p2 V! ~ called by procedure DO-PLOTS
) @7 b) Y' l0 U called by procedure SETUP# Q3 a: U9 D4 o3 J
called by 按钮 'setup'- Z3 U1 f5 i x/ L$ B
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
