我编的程序如下turtles-own [energy]
0 R; j+ Z9 F8 I7 Tto setup1 i6 b2 @4 g6 C0 v
clear-all, J( H, n3 T# R
setup-patches h/ h0 v7 _& s) s8 T/ k" p
create-turtles 100& h0 Q! G5 W/ f V5 c
do-plots6 V6 _7 {) w) u, a2 f. s( B2 J2 G
ask turtles [ setxy random-xcor random-ycor ]7 }; [, C r, K z
end
3 i4 t) L5 N* Yto go0 ?' B1 L/ N1 f$ }
move-turtles3 n* `7 v7 v" ^" Z- m" s' \) ?
eat-grass* }7 k5 A; u% ]: m' a+ @9 w
reproduce
9 a+ P) f2 z4 y' f check-death
; b9 G' S0 I8 i, m' g" q regrow-grass
1 A9 Q6 n, w( A/ W* U& y+ ` do-plots; n0 f4 j7 L6 i- P* q; @
end9 y% V, t; K( g" t" ]
to move-turtles
- r {6 _) b# r9 ?0 n ask turtles [
: b0 P4 c' x) B ?# L z right random 360# \& G8 J9 y6 O$ ]8 E1 H, P
forward 1* ]& l6 n( e R, \' ~$ T5 _) T" G
set energy energy - 1
: Z a6 L& E- Y+ c# U, x) U1 \ ], B/ n1 p( z& h7 N) S5 C. s
end% w0 u! [' L6 i+ j7 b0 [$ H
to setup-patches
2 X, v4 N6 P9 {5 v. F ask patches [ set pcolor green ]
9 S2 F% R/ i! mend5 O( b5 ~% V6 k
to setup-turtles( z V8 S$ E4 a" j6 |, T
create-turtles 100
) G) s/ N# x$ O& a4 ? ask turtles [ setxy random-xcor random-ycor ], r' ]9 S v, z( ^. B0 L
end ?) C6 N, @2 \7 R% W! m7 K. c6 R/ y7 b
to eat-grass7 B* E u3 A' I
ask turtles [
2 }% B6 \' b, m) q8 Q( I n1 ` if pcolor = green [
" V' i; z$ b) l& ` set pcolor black
% T' f$ T( j' x& b- Z set energy (energy + 10)
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ifelse show-energy?
2 G- H9 n+ f4 T- u [ set label energy ]0 d) q0 ] v; I2 R! O2 p* o2 ]
[ set label "" ] S4 ^6 w3 x( Y, z
]
% M8 L( t! Z& ?8 B, {; X1 Jend3 l9 Y# G- m) j' o7 J( E
to reproduce+ ^7 q+ V4 V1 x8 e2 p3 r
ask turtles [6 C# S8 V* P7 ]6 J
if energy > 50 [! G( y) Q& J3 i {) c
set energy energy - 509 {; ?# }: Q7 t8 e0 u4 `
hatch 1 [ set energy 50 ]
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]: O2 }& g0 \4 Q1 e5 n+ |
end( {1 l5 H r; i6 D9 g- K1 C( o
to check-death9 u/ B s' H2 k+ S
ask turtles [
; t$ X% G. w6 d0 a3 g if energy <= 0 [ die ]; t! |( [: a, v7 Z
]
8 h2 \/ c5 }6 ]end
6 c5 W, @! P S: Nto regrow-grass
' w+ |2 E; d% i ask patches [3 i/ K: ?% X- Y9 Q, S% `
if random 100 < 3 [ set pcolor green ]
9 g3 \* J5 R8 r6 F! t ]
7 @ E: }$ V: qend$ o3 ~2 `. v" q2 ^. S
to do-plots
9 o3 j8 X6 W8 N9 x$ ^ set-current-plot "Totals"
: R) F, E x0 h8 n) A( R) L set-current-plot-pen "turtles"4 y4 K' h7 r" l+ A5 d
plot count turtles
; ~5 j* r* F8 u. G6 W set-current-plot-pen "grass"
3 G ?2 X- T2 [* e3 w- ^# l6 i plot count patches with [pcolor = green]
6 v7 G5 g; m3 {( T$ R& Yend7 T, [1 _+ v D* t& D
可是运行时提示no such plot: "Totals"4 x s; y. g! s- U
error while observer running SET-CURRENT-PLOT3 E. p+ h. X0 l* b' _, Q: P
called by procedure DO-PLOTS0 }; q: o, F( K. o: Z& U
called by procedure SETUP
/ K# ^& N L: \5 q3 W called by 按钮 'setup'# b' C5 Q2 B$ c& B( |. P. T
求大神解答啊 |