我编的程序如下turtles-own [energy]
/ d1 }7 ?& p% Fto setup
1 z/ J0 Y4 n2 @- C. E/ \' K clear-all4 T/ d8 N' Y( c# D
setup-patches% ^$ {' i# w8 M( u1 {. b9 Y
create-turtles 100
) U1 |" S1 w$ P9 v& j/ [) ] do-plots
/ m# j& m' U6 Q ask turtles [ setxy random-xcor random-ycor ]
$ ] a! R& S1 c- @+ K/ n8 k1 k8 R/ Xend; p& [* c5 w& s& {: m
to go
1 O% x' a3 Z# S4 j; g$ Y move-turtles
6 d; U* F- n' g% D* Z eat-grass- G( J. ?' _9 @0 ]/ Q- b: T! t
reproduce
) E) n& ]$ |: B- |) P, b: ~: T check-death
/ g. y9 _- X: V7 v0 Y regrow-grass' P5 A% u# q& ]( u( B
do-plots
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to move-turtles
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$ G3 p3 K) o- e- a, f1 q- J right random 3608 M: K# }% h/ E9 G" W1 M
forward 1) \; }5 s2 {3 ]- D) |! R, o
set energy energy - 1
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% U3 ]% K" d, A6 ?" T8 L3 b- i* [end- F, @+ _( W# V& K7 U: e' W9 @1 w
to setup-patches' H4 U9 G2 D& L/ B9 T$ z& m) x
ask patches [ set pcolor green ]3 {( ]. G( Y% v2 u+ n/ R5 j! u. v
end
7 a) t- Y3 _# I, S0 L9 }to setup-turtles& \" O- ?% T- [# a9 A( U! E( q
create-turtles 100# M4 h: f. B/ [6 R! o( ^
ask turtles [ setxy random-xcor random-ycor ]! l# n7 J6 A' y: a
end7 ^" C- d/ Z4 K1 T1 l+ g, d! `
to eat-grass4 z" J0 A6 y6 m9 V! D! S" S5 `
ask turtles [% c; _+ U! {3 M% _# w
if pcolor = green [( ]& B! s/ }$ A. b) Q9 x/ L5 c& ^ k
set pcolor black
" i* k, Q. n# ` Z( |% d, [ set energy (energy + 10)% x: q% P1 |% L4 m; Y; W
]# l/ B7 O$ C2 w
ifelse show-energy?0 ]& m: D5 ]8 }- f
[ set label energy ]" a) q1 S& w* E! T5 ^, b7 ?
[ set label "" ]
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end1 ~! Z& X0 ]' k) i/ g4 e; x" V
to reproduce
4 G- B' c" M2 R, u6 @) R# F ask turtles [3 Y* C& k4 d9 S# ~
if energy > 50 [
, m/ }! Y$ u, z2 ` set energy energy - 50
6 Z% w% K7 H2 a9 ` hatch 1 [ set energy 50 ]
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]
# z0 l1 ~4 L" M9 \. }. r" r6 ]" bend! z7 q! O1 ~# j8 X
to check-death& A* h, `! k1 m+ D, W+ u! F
ask turtles [
# |0 Z/ w8 _0 Z7 ]( K if energy <= 0 [ die ]' ~+ ^- F1 B. T' t L2 T R0 K
]
" k; R. Z+ B8 @2 E- I9 i7 [end
6 _8 K K% \8 B+ C7 `0 jto regrow-grass
) d8 |3 a4 _4 V# F9 [: T6 q ask patches [
& q5 R% R2 R- @5 N4 A3 A% I* D if random 100 < 3 [ set pcolor green ]
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end
% m- S! c3 X: e/ y5 b6 Hto do-plots
! j- J7 i3 t7 {3 Q4 J5 |% U set-current-plot "Totals"
9 ?7 m1 q4 c8 C set-current-plot-pen "turtles"
9 L; _ @6 k O plot count turtles
/ W0 [$ ]: J+ o8 N set-current-plot-pen "grass"1 P$ o Z e2 e8 P( F, P0 G- A
plot count patches with [pcolor = green]
2 X% ^1 m! T/ V3 u7 Y) ]end
+ f. m$ P4 {, N/ ~/ G% v) ^. r可是运行时提示no such plot: "Totals"7 T$ M9 }" f* z0 T: ]
error while observer running SET-CURRENT-PLOT
. m4 c( d' J" t called by procedure DO-PLOTS! ]* Y8 E u" r" Z
called by procedure SETUP2 ]. i! o1 o4 Z
called by 按钮 'setup'
2 v7 a1 p9 p* S8 \+ N0 g求大神解答啊 |