我编的程序如下turtles-own [energy]
+ D% Y: ]: T1 F9 a9 Cto setup8 ~. i; o* r9 b& @/ H. \7 h& A
clear-all# W5 }) N" f+ _! v
setup-patches
7 H; O& F% L e' {+ | H$ T create-turtles 100
: w, L, ]/ B$ O" Z7 D1 y do-plots' X: [) w5 K" J; Y+ E2 t I
ask turtles [ setxy random-xcor random-ycor ]
* G1 u" s G" k! X- p' w& l) @& g* W9 Nend
" g3 x: k! a8 I- F. r+ Dto go0 b5 E- w: z6 ?* ^
move-turtles
! ^; b3 o% e. I/ u eat-grass' Z% C: J' ]; J a9 x" f
reproduce) C4 N3 k5 n4 f2 U$ f
check-death
% K+ L4 u. I# B- l! S9 X6 J* h: c regrow-grass
: G) O4 n' f/ c0 A) l8 b do-plots
Q8 _$ X9 \3 i9 x% Q& ^end+ d7 S' J) x& a8 X v: a& f2 R
to move-turtles
4 Y& `5 n, G- j# t: W ask turtles [
& o# \% W: n" e0 a# D- B right random 360
0 Y& E/ w9 h5 l# T/ T; v forward 1' Y( O( Q; |' n$ d8 ?1 H+ M- C
set energy energy - 1+ ~$ ~: b' D8 u& `9 _
]
2 r* L( D; b* ~! H/ n% Qend9 F' N6 E6 [0 Y3 h2 R: m
to setup-patches" O$ ?$ W9 _, v1 d3 ?
ask patches [ set pcolor green ]0 H8 i8 X( O3 t" U% G
end- Z3 p+ y+ g$ a; p9 J
to setup-turtles
) G- f4 O$ L& u8 Z M' R& p create-turtles 100
& ~; ~- o! f5 V7 u+ r ask turtles [ setxy random-xcor random-ycor ]
+ j. b% b% k3 Y' Q5 L& h. Cend5 w* x# b( E3 h6 q* P1 a* s
to eat-grass
' E- x$ G" H/ {0 O! \' L( k ask turtles [
8 i1 x8 E" s( _6 R$ V2 N* e if pcolor = green [
6 k' {1 R/ J% B set pcolor black4 v Y! ?6 I) l
set energy (energy + 10)4 O4 k1 K' ^. t$ B
]7 F2 O* K& w& i
ifelse show-energy?
3 ~1 a4 i* e& K& W [ set label energy ]
4 l" a% |$ C- z' J0 Z7 K) [& b [ set label "" ]
5 Q0 A: m' Y; S: p: Y# g7 \+ I ]" m; w( ?% E2 i8 ]
end) ]6 a% K) L1 R: R* V( a
to reproduce
( i, M* @2 c$ E- e7 N7 V# M3 z# e ask turtles [
. x9 m d0 F7 }8 }% ? if energy > 50 [' |9 L8 s( ~) S) A
set energy energy - 50$ T; u/ s% i' ]0 k# {
hatch 1 [ set energy 50 ]$ ^, n2 p) k! w
]$ l% u, Y2 J/ s1 f9 t
]9 W. h$ f" f0 n" o! Q
end
; _( f, E0 D4 Q8 Y$ P4 }to check-death
/ a$ n, z7 _" K# X ^4 ^0 ^0 X3 R ask turtles [7 O) J9 }1 u7 D. V# P9 t( s+ i
if energy <= 0 [ die ]
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end
. q) j6 j; s/ V: oto regrow-grass' ?0 |! n8 @- p, r+ K
ask patches [* K: K( E) ]6 ^* g+ n6 a
if random 100 < 3 [ set pcolor green ]
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end1 p8 i0 t) M* C: R# w# L
to do-plots/ W" L7 v8 z4 N! P0 i7 w
set-current-plot "Totals"9 e/ ^. ^) e: i4 V8 C, m
set-current-plot-pen "turtles"+ x9 L6 J# D2 x8 S8 P+ u' ^% `+ w
plot count turtles# C. X: a1 S% h+ C
set-current-plot-pen "grass"0 k) B3 B, N* }% Y
plot count patches with [pcolor = green]' ^. @ `2 ?$ V9 G+ m6 u0 B
end
7 @: @1 M4 a) p& l' q可是运行时提示no such plot: "Totals"1 Q. q" a/ ~- W. R; D; D
error while observer running SET-CURRENT-PLOT7 I v" {* W! X3 y9 b; Q
called by procedure DO-PLOTS
; T$ q3 H4 \# b7 V# W% V called by procedure SETUP2 M! q* f$ _3 N: ] {
called by 按钮 'setup'
6 M* r* L% h& | g求大神解答啊 |