我编的程序如下turtles-own [energy]) _) M: V: `& t3 ^, u" p; g
to setup2 q; L" B# L( J
clear-all6 L# a6 C- K/ Y4 q; [* M# \- o
setup-patches( J/ \; o: X% b( I% j2 M
create-turtles 100
, p" L, o8 v3 c3 }) } do-plots
, `% b: ]1 z+ a1 V& s ask turtles [ setxy random-xcor random-ycor ]# [4 ^2 ^ t P, w, N) j
end5 m4 A4 u. E: F: G. h
to go
5 v* I; ~# P; J7 ~$ \4 @) H; O move-turtles! [4 e; y- N( F8 o2 m: b( X( N- |( `
eat-grass
2 C b6 F2 H- a' t reproduce7 i5 D- s0 v# h3 Q
check-death% b( D+ y" x# S9 P( B; |) Y
regrow-grass
; h* I8 o; I ]' i% T- M9 x' F do-plots
2 q/ p0 s+ `0 L3 yend j, U4 S* y& r; X) c6 I
to move-turtles
, L& z3 S3 ]1 W; q ask turtles [
' {" G* C( R) f8 i, e& t right random 360# g% ]" j2 a2 E) [4 c4 b
forward 1 L$ L" @2 p) o2 Y
set energy energy - 1% z) R8 _ p1 J0 m4 q, r# p* h
]
7 ?! s( Q% y- Pend
6 N6 n G* N0 b% H; d0 cto setup-patches+ g8 Z& I& B; x* }0 x3 B8 u2 a
ask patches [ set pcolor green ]/ c0 j( E5 x0 u0 B
end' e$ J+ Q# G4 t5 Y/ b1 K
to setup-turtles, K( M; h6 B; X+ b/ p
create-turtles 100
0 u- d; z8 g5 w/ u% J- C ask turtles [ setxy random-xcor random-ycor ]. L+ p( I q( W6 [, w% i' Q2 ?& K
end
; w8 N0 W9 m O$ k1 k; z- Oto eat-grass
3 ]( e# s5 C5 \1 b ask turtles [5 I! ?# d0 ] Y$ j, k# @: |- r" L
if pcolor = green [
( V. x5 {: ~- X* [$ ~ \ set pcolor black) [. V2 O' v# K3 G
set energy (energy + 10)
1 y6 A0 L) r7 i$ R ]( e( N* w, K9 J- h( u) @+ }6 P) c
ifelse show-energy?. `! E3 g0 g3 }7 Z
[ set label energy ]
1 Q+ A# P( s# n* s/ m( o- y8 e [ set label "" ]
! ~; I6 |! }) [0 a: h9 `" e' r ]& i* ^9 r5 \% t* c, ]
end% F/ Z* J( N u2 W
to reproduce& C3 J' A8 G- U, R: ^/ B
ask turtles [4 N9 k) \4 ~! [2 C
if energy > 50 [
) U+ @: O5 Q1 R2 J) o% b( g set energy energy - 50, ?* t5 m5 c( }2 q: Y9 a
hatch 1 [ set energy 50 ]+ Q/ q& J4 e' L* E
]
- F& f. t: d' s/ E& T8 y4 ] ]- T% \5 P- m) o: y, s
end
" {. k) x% D! c) f3 `5 G+ ?1 cto check-death g* n! `1 ~' ^: H. M
ask turtles [1 h- p6 }( {. o" y# ~2 K' d9 _
if energy <= 0 [ die ]
& k( h8 @& b0 m% F4 ~% ^ ]
2 h0 [* `$ W; L' ?' v7 z* oend% t# ?/ X1 F+ Z
to regrow-grass
$ j: `1 ^* I, g7 o. `* V ask patches [3 p; j9 \+ R: S. N! I" r, ~
if random 100 < 3 [ set pcolor green ]
2 ^6 X# e, ?' Y |% N, t( ^2 j4 x ]9 O% E& C& h0 T. Q9 C! m
end
! j: N# M. ^. z9 eto do-plots
4 W" r, J! z. v8 }9 A4 E5 {/ Q set-current-plot "Totals"9 e; M" d, X2 F
set-current-plot-pen "turtles"
# @% f/ r6 v) S5 g/ @" f& W plot count turtles' r, O3 Y* v( R6 E
set-current-plot-pen "grass"8 w0 Y# I0 F* N
plot count patches with [pcolor = green]$ @) s3 i& ~8 T a" D
end$ ], {7 f% ~7 P6 r( L4 X% i
可是运行时提示no such plot: "Totals") R) X7 c7 i! y
error while observer running SET-CURRENT-PLOT7 P! \$ B* Z+ ?+ j1 V% T) d$ n. _
called by procedure DO-PLOTS
?8 W, H8 F- ~" H called by procedure SETUP
! Q: p0 _: M/ m0 ] called by 按钮 'setup'* F- \ F g g: H8 F J$ f# s; W& D
求大神解答啊 |