我编的程序如下turtles-own [energy]
8 k* y% F$ ^ s. Zto setup4 A- D. P$ \' M! H$ ]! N
clear-all: \! n9 [. y/ | W5 u& o
setup-patches) H- U" n, O8 G7 {7 d+ ] e! I
create-turtles 100
8 K9 m6 L; G+ E* d do-plots' k t, z" q9 O' K
ask turtles [ setxy random-xcor random-ycor ]
# p9 j' r. C1 \9 C/ K5 ~+ hend0 W& P7 b9 Z0 y; H3 W7 q8 d6 Q
to go/ R; x$ i- l2 e
move-turtles
/ b3 {' e" d4 Q eat-grass
" f+ v- K2 G7 J% E) I( k* F reproduce* ?0 K7 t- P) _3 M1 c. f7 v
check-death1 P/ y5 |9 ]0 z" V
regrow-grass
, E. R8 b" d1 B! b# `( z2 F do-plots
2 X) {4 ~- d' o* pend
- s1 \& V* K5 m" k M5 d: y( m/ Lto move-turtles- z% O# v% q9 z8 R/ p
ask turtles [
5 @) U( i" v4 Q right random 360
~2 _; x, t6 h# i forward 1
5 p; P. u4 F5 ]5 u9 D. }# C set energy energy - 1( z7 d4 b1 G( [+ p0 ^
]' m) c9 J$ C! n0 K- X/ s: t
end
/ J: E- G B# _! Y/ W) Oto setup-patches9 ?5 i. }2 | h2 j c9 w
ask patches [ set pcolor green ]& q) c- U1 _' w) z+ ^) j
end
" T+ O1 n2 C! r ?) r$ f" h+ Cto setup-turtles
" Z4 s J7 r3 Z. ~' ?5 w$ V9 |2 ~/ D create-turtles 100* G& i" y. ]2 z* ^% Y& q5 G
ask turtles [ setxy random-xcor random-ycor ]
% |8 t" I. J8 @end
o2 |' D) U7 {6 N3 G5 Ito eat-grass
+ U6 l3 ~/ ~3 Y6 Y9 B& H% C ask turtles [
( [) }/ }/ i* J s if pcolor = green [; ^( O! G, u- r! y
set pcolor black
* W; Z6 F4 H; ?5 S set energy (energy + 10)
- Z) n0 _8 O$ `3 L ]: h- k8 i- i! a0 X+ l' R: ]
ifelse show-energy?
8 Z1 k6 T. b5 }1 Z [ set label energy ]* [' n0 w9 o/ n0 y0 r
[ set label "" ]& X; R; B$ o* p! U' u$ ~: |# k
]
" l+ ]' X0 n& W6 H' z+ ~ Fend
+ K) M4 r7 w& ~+ h; R; g8 a4 qto reproduce
4 N/ T" _# p+ K$ C) L ask turtles [
+ [2 D f5 c4 P- b( `1 N if energy > 50 [2 M; e$ x$ g, o: m1 v! I
set energy energy - 50
# M2 S9 B( e! y hatch 1 [ set energy 50 ]# B& k9 P" E9 d- a2 d
]
) u& [5 Z' a& e0 {! g ]
- `3 G2 T1 z% |- y( p/ tend `# {7 j0 |" G* n/ h, p2 O& R
to check-death
9 o# ? L3 b' ^' v5 ?6 v5 X& L ask turtles [; Z' t& q' p' k) B
if energy <= 0 [ die ]
. I) T" g! J4 ?( W' D, J; {+ m ]
1 x% A/ o" R8 D, Qend6 A: A( J1 @! }3 P1 }0 n8 l6 B7 E4 `: d
to regrow-grass- g) e$ F5 {0 Q. O" E# W# p7 R
ask patches [) ^+ [" P* Y' d- k$ `
if random 100 < 3 [ set pcolor green ]- V) B# ` g- y! I
]
- e- \5 O( _& W0 mend
9 n; W2 f* {3 Z' Yto do-plots7 r2 n/ n% z' J$ b/ e# N8 K
set-current-plot "Totals"* q2 A$ m( @* \5 K2 v
set-current-plot-pen "turtles"' H1 G5 ^1 u$ V, ?% Z
plot count turtles. P' L! N1 ]& b/ U( ]) m, R f
set-current-plot-pen "grass"
0 h) ]& k7 z" Z7 t plot count patches with [pcolor = green]4 x0 r! W- m+ S& J
end
# {2 ~% v' p/ y( U2 Z5 p+ d6 b, @可是运行时提示no such plot: "Totals"3 j5 l6 m/ B" g+ r. w. }" n9 T0 ?
error while observer running SET-CURRENT-PLOT
5 K# f3 a; ^/ v) n8 I called by procedure DO-PLOTS8 x, r% L, w3 ?0 X6 J' X
called by procedure SETUP
7 l* D5 T- D$ O( I called by 按钮 'setup'2 C2 Z5 H4 G! j& E$ g
求大神解答啊 |