我编的程序如下turtles-own [energy]
7 u I4 f, Y9 t" x. Nto setup0 y$ B1 s6 t9 k% P3 i
clear-all3 P, I& U# _8 V6 B
setup-patches) g. N- I! C- n0 s, I! t
create-turtles 100
9 A' P w5 B9 @3 { do-plots
' ^- v1 P' f& r0 W ask turtles [ setxy random-xcor random-ycor ], o2 F R, T6 c8 s
end! r# G5 s) s1 i/ S5 F
to go V7 G& B$ f6 c* J/ R
move-turtles
2 q& F+ [6 z5 M% \ eat-grass5 P' I$ D& O, \3 \% B
reproduce, W0 m3 S) r0 i* h; {- y4 |
check-death
' t2 w1 q p- o ^ regrow-grass
& n, P6 \7 X8 W" D& \* K do-plots* Q. J4 k7 y$ B1 [7 y7 Z1 m3 \
end% a0 T3 o/ | m, R; T
to move-turtles2 C2 e1 y$ l) S6 j
ask turtles [* F8 |+ P0 m9 Q0 J; P& c
right random 3608 `2 I6 \7 r' d `$ I/ F# s6 {2 H
forward 1 `& z# ?) w' b6 O+ F @( r
set energy energy - 1
. s1 q% x# G" \, ]2 [: }6 Z$ R ]. a! R# Y$ t) q, `. z
end
9 \1 ?/ m4 I) dto setup-patches* L/ \7 `+ {3 b8 D0 e0 M: u4 }
ask patches [ set pcolor green ]
& ^0 W/ ]& o6 o4 c7 M& c8 Jend9 m8 |) p3 L& Y {
to setup-turtles; \3 g/ R0 a+ C1 p/ |$ p
create-turtles 100
6 J% Q2 Q6 `7 x/ P ask turtles [ setxy random-xcor random-ycor ]! s! _; ]! L9 C! F
end
, L, `. Q& N0 S% [' ato eat-grass. x3 u+ @, L; ~) p/ {( `4 B- S
ask turtles [! r0 Z7 ?- p6 \0 L/ y8 \
if pcolor = green [4 Z6 C$ j# n9 R
set pcolor black
/ g; ^' U4 n# L8 \8 J) b set energy (energy + 10)
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ifelse show-energy?
, f# Y+ n8 k7 } O) m" s& x8 t1 @ [ set label energy ]
- t D/ P1 S- Q6 B; W+ F4 b# W [ set label "" ]- X, I' u/ h+ S- F4 p
]
& i' e" }/ g3 {; Nend4 t9 ~9 g" Z2 r0 ~
to reproduce
! x g) |. Q$ b ask turtles [* o( J* l; E& ^
if energy > 50 [! a1 O+ R- ~1 A3 s
set energy energy - 504 V1 @3 E% v% [' @6 x: j
hatch 1 [ set energy 50 ]
/ {' [/ [( Y3 J9 L2 ] ]
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end
( l3 n; b' U/ M; P/ _7 p# |2 Cto check-death
& a, O/ ~( [2 Z/ Z2 R! E8 ^ ask turtles [
. x9 O* d$ b3 O8 s if energy <= 0 [ die ]3 t$ d, B$ I+ F
]
, \9 Z% @) A8 jend
0 M% @# o% T( L( U" t" w% C& Sto regrow-grass
. C- ` d4 d8 V& }+ N& m* o% j ask patches [
; G; T" s1 x% Y4 l6 j; E l if random 100 < 3 [ set pcolor green ]
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end
4 Q( Z# _, j0 j* D# Nto do-plots
9 T/ w$ Q J5 A) J set-current-plot "Totals"1 j" P' a8 D8 Y: e. {. @" f6 v
set-current-plot-pen "turtles"
/ A5 _( q6 @1 { plot count turtles0 n2 ~8 c8 ~6 \/ |
set-current-plot-pen "grass"- U0 |* L2 X2 g9 }* w
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
' V( o, [! b" E0 k! \# p5 ^& Kerror while observer running SET-CURRENT-PLOT
6 _( x" q9 D7 \ called by procedure DO-PLOTS: z/ p6 Z% U- y2 E* G* m
called by procedure SETUP" F. k: b; A2 ?
called by 按钮 'setup'
9 W6 E& y. s3 S4 P求大神解答啊 |