我编的程序如下turtles-own [energy]
$ W t# T m* \* B8 Z4 |& qto setup0 ^* l* @/ P8 ~, O i
clear-all- t9 d# Q8 c, n- D* m
setup-patches s) d" S* Z" {
create-turtles 100
@) y& L& m: b( D0 l do-plots
8 e: A( n; q1 S( L% L* W5 ]- A ask turtles [ setxy random-xcor random-ycor ]
+ s9 c2 g% J: d0 M% y" Pend
" C* `) g+ q: w5 @# q; `& ito go
4 m0 i/ P: L5 ~1 i move-turtles
+ W* `3 T% n) a" L eat-grass
) W. Z: b* C- X' D6 y' x reproduce
! b3 d+ F# X0 m check-death, a/ L( G# [# r, C- x9 J- f
regrow-grass6 }9 x: ^9 h1 ?2 E# l9 K
do-plots [, f. E7 @% E; V
end
! z ~9 H' n" {( P4 _to move-turtles
! W6 B+ B# Y/ y! T: m ask turtles [
6 d1 x( @/ A* H7 a- R* z( H right random 3603 O7 v8 f: x: `' G9 N( m
forward 1
- `8 p8 E, i0 P- X: W set energy energy - 11 R3 U- I+ ^- Q6 b) W5 T7 ]8 S5 i
]+ w0 p H& E( n
end
' G$ X \( d0 ]# w5 Wto setup-patches
9 i5 O7 ?+ }4 S; O7 L ask patches [ set pcolor green ]1 [% U# e1 g+ M# e: t' W
end5 B. V! ^( f5 B! L' @! {, M( l
to setup-turtles8 D; Y5 c. W. E* J. A- Z$ t1 \ r
create-turtles 100
8 J8 \7 X# d3 c( r$ n- \7 p8 N ask turtles [ setxy random-xcor random-ycor ]
; C/ K- p" c3 \6 C: G2 a& x' |7 Aend
9 i. W8 a4 a: Z1 |- B4 p2 Tto eat-grass
2 |6 _6 m+ w* M ask turtles [
% b. X# ~5 J$ M& E4 c1 ^, y if pcolor = green [# D1 h. ~- i; J4 O9 @: C% r. J* a2 \
set pcolor black
) e' p" u) _, w! u& k7 i" U set energy (energy + 10)
/ P7 T( w$ y8 g, I0 b+ P! P ]- S. Z3 M0 o: I2 q
ifelse show-energy?
& Q7 ^& i! u: \ [ set label energy ]0 B7 ]1 U/ N3 A, A5 v4 E
[ set label "" ]
: }! }3 Q) u; e1 m ]+ ?4 O4 y3 f7 c; j$ L
end
1 |/ D2 V4 H; N& s4 {to reproduce* p2 E5 n" O( i! V2 ?4 r
ask turtles [8 u) K- q j m: z. V1 I
if energy > 50 [
; S9 p5 ~9 z9 f8 F set energy energy - 50" r9 i* V1 ?! g: p! _" m5 `6 c; _+ s
hatch 1 [ set energy 50 ]+ R# w. m6 x1 J; Z7 e
]
) y$ t# f7 @# R+ v' U' g* j( ]0 g9 X ]5 U. ~* e# p) E
end
: X; t9 M1 M1 y( N% v+ Lto check-death: B# M# Q8 M1 d* M p9 G) Z: n
ask turtles [' M1 N0 y8 P% y! n1 R
if energy <= 0 [ die ]* p4 t; j* _: a3 \
]4 z$ a" u5 @" _. U$ }' I
end
2 D) |* D6 f* f: O4 e+ F" ]to regrow-grass) S6 U( Z1 i4 I* }# R: |
ask patches [4 @: A* w, a7 z/ x
if random 100 < 3 [ set pcolor green ]! m2 z0 z- O/ s# r: c
]$ k8 \! }" J5 Y7 j. I
end
2 U3 N7 D3 m F- _- |to do-plots/ s& i$ X5 E0 F+ y; K- M$ g- E
set-current-plot "Totals"
* @3 [; i3 V" p$ h set-current-plot-pen "turtles"5 a3 S( O8 M8 c# o: P3 w4 l F
plot count turtles# G8 z+ q( b8 M8 o" d" H
set-current-plot-pen "grass"
" w; n1 l9 e/ {8 f; V z0 D) ` plot count patches with [pcolor = green]; y! y3 M% u! N* {- N4 J
end+ c8 P* E; m- H: K
可是运行时提示no such plot: "Totals": ]' S B% C8 q. o/ u3 t& i" {5 c
error while observer running SET-CURRENT-PLOT, f- f% O' K$ {. m+ Y
called by procedure DO-PLOTS
& J8 d$ c7 g; @5 k0 l. x) k called by procedure SETUP. M& M2 A. g* Z- B* q+ r9 U& S7 Z
called by 按钮 'setup': `- {% W% S# V3 T8 g7 W9 Y' c
求大神解答啊 |