我编的程序如下turtles-own [energy]
, I# `1 x* t) q3 |( }to setup
1 L, L9 L, Z2 \ clear-all
K/ ?! D; [+ a. E) Q setup-patches6 E3 R" `6 O* h, g s6 {
create-turtles 100 ?3 R5 ?# c: N4 y }4 {
do-plots* I" ~6 U$ W. b5 b5 ?
ask turtles [ setxy random-xcor random-ycor ]: R/ O% `, q C5 t% X6 U9 H6 W
end
1 O& u6 K, j6 D" G3 Gto go5 q1 ?. N' C1 B9 Z3 D
move-turtles: A; Z, q( a$ z4 s U
eat-grass/ u+ U+ H4 B8 {% m# R2 J
reproduce
1 T4 A3 \' p/ J2 z# a check-death
4 h* U" v' ]/ s4 n& ~ regrow-grass
( D' X& \+ P2 o {5 x do-plots5 W/ @" D, n3 ^
end
: W: }! u+ D1 S' T+ w6 B3 oto move-turtles0 N$ r% d# t" C+ A; e) \/ n
ask turtles [
+ g5 V9 z% ?( l7 N; r right random 3603 e- Z' ^. y F8 t1 G; E
forward 18 }, _. _; A, F8 r6 A( W2 ?
set energy energy - 17 g n2 @0 k0 [& ~
]& n- B5 J3 V! h N& l: o* C
end
" b* y5 W9 r l' {8 lto setup-patches3 W) C h: T9 q; _0 g& g; u
ask patches [ set pcolor green ]
+ G, l- j" I7 }4 X* `( y% ~2 u2 oend
' i8 c: f) ~" {to setup-turtles/ Y' j$ m8 I3 Y4 Z, D V1 x
create-turtles 100
$ e. H% ^- Q. V" h) W; x/ v ask turtles [ setxy random-xcor random-ycor ]
( \2 y3 [* s( y; u" p8 x: dend
! [$ R4 p/ E6 [3 m8 tto eat-grass5 C$ O5 k, l% R
ask turtles [; |: N6 c% \+ ~) a# z' Q& _
if pcolor = green [
# U* n% r) ^% W4 c! K( ^) z7 M set pcolor black
: M) \( Q' J y# |- }6 q' N& k set energy (energy + 10)- j" I9 J7 M2 u2 ^
]) @& Q$ B1 L" M/ q u6 j1 L, P8 `' f
ifelse show-energy?2 B5 o2 v' W E: L1 ?7 P6 {2 K
[ set label energy ]
( p4 l7 z, M& ^; o* p( y [ set label "" ]* m( K) e4 V: v4 m& W
]3 {) C! B: _; C( Y" _& T* s" g7 y
end
& c& w& P* f6 w# D' F! dto reproduce1 W1 H' X1 N2 y- v
ask turtles [3 L1 x: X5 J# r
if energy > 50 [
, ?( h. O0 Y& `# H" A set energy energy - 506 D" P1 V1 j7 ~1 k7 ?
hatch 1 [ set energy 50 ]: N# N* ?. D0 d1 k0 M
] ?. b1 x7 f4 ~! X
]. g( U; \ n2 y3 M
end D) f( w! d4 d/ V" H$ s
to check-death
3 i- G" I4 b- F. S' q ask turtles [
$ K0 F+ T9 S4 b: k" ^ if energy <= 0 [ die ]; n' Z5 `; W8 c. O/ U8 i" i
]7 ?3 g/ c Q' `' M
end! K: z% {5 j$ X+ ~% Q# N& {
to regrow-grass o. C$ r8 }8 l& R1 a
ask patches [
, B2 q/ x; _! B! { W# E5 }( a if random 100 < 3 [ set pcolor green ]# A; k! Q$ l; n
]- [+ P% g+ R0 y' d/ |( [/ e, g
end
0 _. k5 |2 N, _to do-plots1 Q$ Q& |( r# U9 u9 V/ _
set-current-plot "Totals"$ |- O8 }2 z' F
set-current-plot-pen "turtles"
" I4 ~! g2 l. c z5 Q7 \5 g: ^ plot count turtles" h+ \% J) z( P; \3 c
set-current-plot-pen "grass"
! H+ D5 `; J% [2 y# ^' y plot count patches with [pcolor = green]4 Y/ P2 p6 u9 o, G( w/ A5 H
end3 y B# L' H, A, `" ^
可是运行时提示no such plot: "Totals"( U! A9 m# m- ]+ y5 F$ ?6 n4 A
error while observer running SET-CURRENT-PLOT
y/ ` [) C$ w( ~0 L/ }" K4 q; y called by procedure DO-PLOTS
. [, {4 I1 \* Y& }0 [' I8 q, H called by procedure SETUP
% ]0 s8 V% `% o6 H; {& S called by 按钮 'setup'9 x6 S# X& r S5 O) c* G. n+ F- _
求大神解答啊 |