我编的程序如下turtles-own [energy]
- Q% B) B5 Z" yto setup
3 R4 n( O& l2 q7 y clear-all+ o* V2 H, Y# }" o+ v4 Z
setup-patches! l, K/ P# E5 D" z
create-turtles 100
; |; Y3 D- \* P& a- q do-plots( @( i% [6 C0 L: f
ask turtles [ setxy random-xcor random-ycor ]
$ [. q1 C. Q5 \- l" X* pend
' k2 j2 B! n- l9 _! Dto go
: I* d' W. @' {7 ]4 r5 \! w move-turtles5 K" q. g$ z2 m& @) s
eat-grass4 b+ w5 i+ f- w
reproduce
; F3 \: C/ V# o; a0 f0 [2 A8 k check-death
7 r6 Y0 X( k& ]1 w) ^ regrow-grass0 L. i# d, ?4 K
do-plots" N# R* b) @9 h) V+ o# ?
end
+ K& `& i, R( \+ Z- v5 j( {/ `7 Rto move-turtles9 b- H+ r7 a# s1 B; \/ M4 w
ask turtles [
* V2 v/ u; S. N right random 360
& L& f3 I2 G5 B8 s: U( y forward 1
' ]" |: d! t* W2 q) p set energy energy - 1
% n+ T T8 Z" b! u6 h* X ]
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to setup-patches. d: \& L, a/ |! D' i
ask patches [ set pcolor green ]
/ w& b* m) U! f# R1 W9 f; S3 Oend2 @; A" c3 w9 D
to setup-turtles8 Q, z7 Y& V8 b2 c% S
create-turtles 100
+ e2 K; \# S m7 P ask turtles [ setxy random-xcor random-ycor ]3 V0 O' \: E3 w% P. c/ c. y! ^! G
end
* a% n) O# o3 _* c# Ato eat-grass
W4 [6 G8 I) g3 e/ p7 x ask turtles [7 A8 S; m; H3 W% F
if pcolor = green [
, U" H5 ]0 ]& x& v8 J& @7 f set pcolor black
F) k6 ?8 W+ B% P set energy (energy + 10)
j K% N' N u0 e% p' { ]
! x7 s' b6 r G5 m ifelse show-energy?
% a$ r ~, T! {6 U- R; b [ set label energy ] s' y9 X: ?, X) r6 i$ U1 z
[ set label "" ]- n. g, }1 ]; ?) T" e
]
8 i1 F" |6 O. k! A% n$ Hend+ k5 }! F' l7 m) z. Q8 ~
to reproduce
# z) {5 ?. B7 u, x. Q ask turtles [
8 d! f* I7 h8 q6 v if energy > 50 [
; x. E- n# J6 J set energy energy - 50
) q& V3 ]3 ~" s6 K" t) r" E hatch 1 [ set energy 50 ]* K; f2 F, i4 g7 `' A5 M ~. t
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]
: s% ]4 i0 j; U: M, Mend
2 a1 j* [0 m- L8 gto check-death5 n! z) r# F5 v- h) ~" L5 r% m# E; |
ask turtles [. e4 X4 O1 _2 N8 l
if energy <= 0 [ die ], g. {/ S5 V6 v( s2 J9 C
]3 _* F2 Q5 z7 k% f L" X
end
/ c5 [5 Z: t; a1 lto regrow-grass
; d3 z# U# n1 m* G2 |5 V9 a ask patches [. b0 C+ c% x: R4 L# A$ o( E- o
if random 100 < 3 [ set pcolor green ]2 a4 H! C# ?0 m r, H
]
- m5 U4 O( ]6 m0 ~- _end
. ]& F, P& ~& sto do-plots% v! o# E" v7 V6 M# Z; D
set-current-plot "Totals"
% \, r: Y/ c% f( X$ u; S+ z- _" f set-current-plot-pen "turtles"
3 ?9 S( ?1 u. O# C6 C6 y plot count turtles# [# t/ v% _* V+ Z
set-current-plot-pen "grass"
0 [5 y; `# I G: p plot count patches with [pcolor = green]( Y/ c4 J1 M w$ H8 @
end# H6 f+ J; k. C3 T; t
可是运行时提示no such plot: "Totals"
0 K: E8 S$ c6 T% X( perror while observer running SET-CURRENT-PLOT
9 Y. Y. b* E7 c$ D, Z called by procedure DO-PLOTS1 f8 {' K) C% P) a+ b
called by procedure SETUP
1 T, t! R) X! y called by 按钮 'setup'
& C9 S6 C, [2 b; M- @9 I7 r求大神解答啊 |