我编的程序如下turtles-own [energy]0 O" I5 y3 |/ U. W
to setup
' s; `6 S& O: a4 A- l8 V5 C0 | clear-all
2 D& H# _6 @- V setup-patches
, u: T1 H8 e. v# B' q create-turtles 100% u9 a2 I+ Q0 |
do-plots
0 @7 b! b$ D$ U ask turtles [ setxy random-xcor random-ycor ]# e1 D k. N# p/ M3 q2 z6 j( z
end
) J3 c, F0 N+ W2 M0 q) V: c; |to go
1 `; k/ @- U! P5 r. r; f9 I* [ move-turtles
; ^+ Y @8 l' e6 S eat-grass
+ [# g0 ~6 A; G reproduce9 I. O# ~8 w4 C X% T
check-death
( ~8 L( R C) k2 D regrow-grass
) X. e7 M. ]3 w% n* b' r7 O2 h! Z5 x do-plots; b$ }% M/ R8 E4 W3 h: O6 c
end8 b" G: h" N: r9 A- ], B
to move-turtles
, x6 B! S& N8 X @- `- m ask turtles [
# P" ]3 D, S0 D# I& }/ {7 i! |4 @+ ^ right random 360# d) {3 H. W3 Y' a, Z( \
forward 17 ~ f! y' o) K- O6 d
set energy energy - 13 Q# E" F2 { F3 s0 }. J
]
* c* J9 _& t5 H; jend/ a- ]" m4 b' u
to setup-patches
# ?/ L# |$ j1 L5 e; \& ] ask patches [ set pcolor green ]
9 O6 Z! i: r0 N" |& p0 W! pend
) j% W1 F9 ]+ @0 p& Z2 }9 gto setup-turtles8 g" r. {# }: E J; Q1 n _
create-turtles 100
9 ~- \) K9 V. Y: P) w ask turtles [ setxy random-xcor random-ycor ]) y0 a* h" h5 L7 h1 n1 F( Z8 Y% P
end
: ?& { s+ P" y, rto eat-grass
4 O, r5 q% G0 F+ @6 ]+ c ask turtles [
) W% s1 P. q/ d C$ I if pcolor = green [
) P7 a \9 |1 y) ^1 [; @/ G set pcolor black3 G) o. f6 q+ F. D- P9 o
set energy (energy + 10)
3 t% t' h/ W% [ ]8 @' m* c6 o4 H1 A4 E5 ^# _
ifelse show-energy?
1 ?, c) p& J# |* b: t [ set label energy ]
" n5 H5 |- R0 I# j [ set label "" ]
/ S3 W- i5 {* t5 Y& E& t8 g5 k$ k ]
0 ~8 [' {! ^ ?4 c" ?. hend, ~) Y" J8 Y3 X
to reproduce
0 _5 Z6 `9 x% T+ d' D* e ask turtles [- j. p" ~ M$ i9 q* b( `4 O
if energy > 50 [& ~5 R _ o) W8 O
set energy energy - 509 D2 y8 n; d/ B X7 N, z1 x
hatch 1 [ set energy 50 ]4 P' s3 w+ f' w; h
]) R/ v7 q2 A: v3 H4 l- V+ v
]/ f6 ^/ T T/ ]5 d- h
end7 t% m$ Z0 r* ~& t7 j
to check-death9 g" W7 Y# K5 m- |* F: n" e
ask turtles [% N$ i8 Q9 o. p" S4 ?
if energy <= 0 [ die ]7 x+ f$ Z4 {% ]5 z, H; `9 t* L
]5 e$ e* G4 ?) _9 a2 {
end
1 K3 Y, W9 I3 \# N% @2 ^: L" ato regrow-grass! q! [" j' K2 w# l
ask patches [2 T8 x1 c* S$ f$ T$ w# Q4 f
if random 100 < 3 [ set pcolor green ]
4 o' v/ n: T/ l% _* l6 ~4 f1 K ]% I6 h! o! ^) @& L( s- N
end
: U3 T6 i3 ~: Zto do-plots
6 Y5 s0 o- S$ y+ F set-current-plot "Totals" \7 }" T6 {# [/ }( N k" ^( Y
set-current-plot-pen "turtles"- `; l% k2 h9 k' }' U; ]. e
plot count turtles0 s( O. N. \1 j, _ q4 e
set-current-plot-pen "grass"
2 G: ?0 n9 O9 E& k8 ^( z plot count patches with [pcolor = green]
, B' ?6 u# b. K8 t& a/ jend6 \. G3 K) Y" X1 h
可是运行时提示no such plot: "Totals"" Q6 x# O$ x2 n( `
error while observer running SET-CURRENT-PLOT0 i$ h# Z# T( m, V# z
called by procedure DO-PLOTS& f, X' |: [, r
called by procedure SETUP
) z2 {' Q* I+ m% H! ^ called by 按钮 'setup'
+ }/ ~+ A+ G/ s- L4 u7 q求大神解答啊 |