我编的程序如下turtles-own [energy]
& V6 m) t# M6 \! g, c4 D" Q8 o3 Vto setup
! W; @( l* m9 y7 k+ g2 c. H clear-all# A; n) i4 l2 a2 U$ z
setup-patches0 ? @' j) F1 \1 \
create-turtles 100
: |" _: F2 ^3 C$ S2 j: D0 u4 y. g, M do-plots; }* C0 o8 W1 m
ask turtles [ setxy random-xcor random-ycor ]
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to go3 `; h# x; ?& }- w6 U+ A
move-turtles
0 [. E" G$ _* h eat-grass9 Q& V! y( A# I0 e. c( [1 S' V- ]
reproduce
3 P- y: ~7 J6 R0 K# J; }1 D, { check-death, |+ \* c) Q# @# W& w$ f
regrow-grass0 k, b3 P1 M* O+ R
do-plots
) R5 h& O" t3 \" c P1 Wend
/ C2 M! T4 J6 W4 |to move-turtles5 p; a2 n# _8 \! X
ask turtles [. P4 J1 S9 i7 x6 x0 c1 x
right random 360
( r# i2 N1 _- U" r% Q forward 1
% A& U2 D9 @2 }, O! H set energy energy - 1
8 v- ]8 } r) Q ]) z3 M# |% E5 L/ F, [
end
, B e& d# h1 }. P7 |to setup-patches
4 O: `5 a* o) x" u4 {$ ] ask patches [ set pcolor green ]# f+ U+ w% x/ F) c8 N( e. H
end
$ x2 H S9 S, [5 q+ n4 W, `# ^to setup-turtles% u6 \; W9 L! m% L
create-turtles 100 i. o4 A% S" B* Q. S. C3 N7 N/ [
ask turtles [ setxy random-xcor random-ycor ]- Y! ], |( i/ {2 B% X- y" s1 ]4 F
end& b& B/ f9 M" M
to eat-grass
8 R% K/ }4 I8 U! O ask turtles [$ |5 ]% t& i/ g4 A p
if pcolor = green [
0 T0 k( H9 x5 d ^ F8 P8 D set pcolor black
3 y7 G) w( M s1 I) T6 }2 w set energy (energy + 10)
; e6 i: z8 T% O9 ^ ]
5 y* \# }9 y. \( H% f# B! j ifelse show-energy?
5 S1 T0 m$ [4 D6 b( G [ set label energy ]
' c5 H: d2 A0 _8 B& i6 \ [ set label "" ]6 p8 u: s8 g& m, X1 n4 a
]- j4 a- p" y0 p7 b) e1 z3 q4 ?
end3 p& M: W& I m' c
to reproduce
& b& h* l/ F5 w ask turtles [: e* x, ]5 G5 N, q$ R
if energy > 50 [; i4 {. D" G& G' D4 A% m
set energy energy - 508 i j$ ^# \3 h
hatch 1 [ set energy 50 ]
: |4 H U& r1 [' T/ ^ ]. D2 v8 }" y& m* e2 t
]2 @" F" u( M! m& s
end
! b# F/ B3 I( a- Sto check-death3 u1 }* K- \" ~& S% p3 V
ask turtles [
" Q* ~- ], Y5 F5 ~5 U0 ~, k if energy <= 0 [ die ]
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end
6 a9 n% l5 C! V- x* v8 \. E0 l' Dto regrow-grass
7 W0 X4 f+ S8 X ask patches [4 N" P" w0 g# i. ]4 G& y
if random 100 < 3 [ set pcolor green ]! B) t( Q" C) d1 [ m- e% T
]' d; F; Q1 S4 A6 z& k# q: }
end
0 A" M {6 \+ Bto do-plots. J1 h+ Z: P9 P1 f3 z: I1 I
set-current-plot "Totals"
9 j( u' K. w5 n/ l: ^ set-current-plot-pen "turtles"9 ~: M" } z8 `1 r6 t
plot count turtles
) c% G+ k/ K% {" l* a: |8 G6 ] set-current-plot-pen "grass"; r$ o/ D. q9 [
plot count patches with [pcolor = green]
2 j, J4 x- \6 @& v4 f& ]end, `6 ^6 `1 C1 m
可是运行时提示no such plot: "Totals"* k- S* W" `0 \* v6 l' U
error while observer running SET-CURRENT-PLOT( R5 X$ B8 A- g
called by procedure DO-PLOTS8 q3 Z6 K( d% \. L0 J
called by procedure SETUP3 z% ]+ L. L; S5 r! v
called by 按钮 'setup') u3 N0 @+ v7 E0 q
求大神解答啊 |