我编的程序如下turtles-own [energy]5 n8 d# m! S( j' B
to setup
- Z/ @0 w0 ]1 W, M2 Z9 F6 f clear-all
6 J+ ?9 z9 }9 A# x0 @, K! G- R setup-patches( s5 p. k. y. `: C% W0 K) l" e
create-turtles 100
; Q' P' u2 A& T do-plots
. e0 X: P1 ~5 n. p ask turtles [ setxy random-xcor random-ycor ]0 A1 p' y) K& l, b$ N( r5 y
end
% R5 T+ [3 c0 L% b- Z8 g& ~to go
3 k3 g# v6 e6 d' o% s move-turtles2 O4 X) ]% {) K9 O% j5 E
eat-grass( \" i" z' q0 Y; k! M' r0 V2 L/ m* p: t
reproduce- A! s" c8 P, ~
check-death" I8 t0 Q4 f! y4 U
regrow-grass
H, f1 o. O* V; v4 n( R0 t3 }- i2 n do-plots! l5 M2 v& a& F7 {; t! K
end
3 }- h9 K/ m1 l) y' ?# l1 d" kto move-turtles; O& r% s6 z+ r/ X9 y$ E* i$ c
ask turtles [. s) Y+ m4 u6 n `
right random 3602 k& ]" |, W/ T" J0 ?
forward 1$ r' ~2 Q/ f* v) \7 H" C
set energy energy - 1
) o8 ?8 X n: }/ X( C7 ^ ]$ D' r: l( X" C# v
end
c) o; q9 g- [7 E# D4 B' t" I- Sto setup-patches% J2 \( E5 |) V( u: q+ y1 T
ask patches [ set pcolor green ]3 v3 Y2 t U6 Z+ f
end
# w$ c+ j0 `, f2 t( T4 eto setup-turtles! q& u. E1 {4 J
create-turtles 100
! \ R6 g M& j T5 O ask turtles [ setxy random-xcor random-ycor ]1 m" w- B- e4 ^$ x
end
: R7 Q' H9 T9 o# J% Rto eat-grass
6 J" Q0 S; p/ W. {: l ask turtles [
4 j9 D V' S0 h4 {9 Q if pcolor = green [
5 F' U1 K! p/ c8 x D4 {# @' s: ^8 F% B set pcolor black% `7 E4 t; A3 M E7 a' s, m# v4 v/ o
set energy (energy + 10)3 i+ Q4 G7 Y8 _7 L% {% t
]
3 o3 ^& W3 \6 `; k ifelse show-energy?/ e v" s+ v/ n: p: c- W T0 z
[ set label energy ]
# y7 [, Z9 {( U( \' p$ s6 K [ set label "" ]
7 d* G9 _' |! Y0 @& K0 m) c ]
. A! P8 [% G4 F! g* C' @end: M5 G5 `7 c% k2 x8 q# {: M
to reproduce
- g& z! Z* Y) e8 V/ M @ ask turtles [
X) S2 r6 D' U" P if energy > 50 [* m) u; N! S3 ?) r0 q' z) ^
set energy energy - 50
6 `* \* _4 b& j( @: ? hatch 1 [ set energy 50 ]: S0 D; z& R7 _$ K4 u
]1 [- `8 {2 J9 B! F
]
8 A' t: a- C) a) d# Hend
/ C2 m, {9 O6 d) \5 T5 Nto check-death
- C5 m; M3 I- Q" z4 K ]! r0 p) A ask turtles [ c) Z7 C6 i: \* Y
if energy <= 0 [ die ]# S- g2 \$ D5 r* ]2 Y3 Q+ V
]
$ @& s, T5 u! t" p5 f" y. C5 T8 ]end
* w! n) U5 \' ~) J7 M) uto regrow-grass3 Y9 |( Q+ C: B- T. K6 P* c
ask patches [
% |( C4 p8 J2 K0 ? if random 100 < 3 [ set pcolor green ]
% _3 O* o; {. i( ]( l1 S ]- z: r a% k$ W: ^
end
% O1 H0 M: S5 b* @9 n- @to do-plots; W9 ?0 q" l. [8 J
set-current-plot "Totals"
2 x4 D5 D7 n! { set-current-plot-pen "turtles"
( q& }' j% Y5 M1 J, V* u6 E; a plot count turtles/ R; }* Q: U( O3 Y. e' N2 p, @/ ?
set-current-plot-pen "grass"* K3 @* X) G; b
plot count patches with [pcolor = green]
2 P+ p3 y( K. V5 u8 C) h; f0 ?end% V; q3 L7 o, I! ?" T
可是运行时提示no such plot: "Totals"
1 k6 } z1 Q3 L2 [* @9 \+ U' herror while observer running SET-CURRENT-PLOT
4 C) f$ s) i1 B( l4 m9 c) B called by procedure DO-PLOTS+ n4 L! u4 c5 P- I3 z' x
called by procedure SETUP$ |+ E$ i) D+ ~3 ~; i) V3 z
called by 按钮 'setup'. v N' s* l+ a/ A$ u0 E
求大神解答啊 |