我编的程序如下turtles-own [energy]
2 m! q" o; H3 F$ ^& kto setup" y6 U6 C4 {! \% L: N. U2 M' a" v
clear-all) H# i; S X" v$ m. N/ `9 X
setup-patches! j+ g7 P4 D7 f2 V- V; Z: x+ j
create-turtles 1000 J! P8 i1 Q4 `6 k K
do-plots
6 ^4 u( G- R: Q+ j' M( y ask turtles [ setxy random-xcor random-ycor ]0 w- m3 d/ a6 M0 g% M; Q. T
end
- M0 Z3 k8 r8 v: V; \9 t) Xto go
$ x$ g M) t/ G2 i) l9 R! d move-turtles' x6 l! `8 g; B
eat-grass
& P6 x7 ~- p* w* i* g reproduce; B' o# S1 y$ W2 ?1 _9 `+ V" `
check-death8 g) G' J3 ?5 o3 D! f' n
regrow-grass
$ E2 C$ M- ]' k# h* a6 F7 e do-plots
( ` l1 V3 E; f2 ]* g' tend
7 b" \+ Y, T0 w& _ [1 m$ zto move-turtles% y7 }" |; \2 `* z4 Q% {2 N: O
ask turtles [
^% w! I9 d, E T right random 3600 M$ N, `, N- s
forward 1
) q, j2 e/ j6 y5 v! P2 T set energy energy - 1! L% w% j0 Z4 x
]+ W7 V1 D: l& B' I( ], M4 G
end
. Q' n* y/ K- k tto setup-patches, E, f8 w5 _$ @8 m8 z: X
ask patches [ set pcolor green ]7 m5 s1 Q% T4 I6 J
end
3 ]+ F( s! b& g9 j0 {to setup-turtles
$ j4 ?% d0 w4 B! o$ U create-turtles 100) h! |, {9 m9 M2 }
ask turtles [ setxy random-xcor random-ycor ]
9 S- x$ q0 X7 }( p% j/ u3 fend
9 P& {5 ~, T7 C/ j+ ~9 s0 vto eat-grass
/ f# ~5 O7 s7 R1 G ask turtles [8 M3 ?- D* A$ P& ]1 n
if pcolor = green [
8 ^, Z8 |7 }* L- r9 L; b set pcolor black
3 r5 S' e6 o) Y( Q set energy (energy + 10)" I# J# z5 v6 B Q9 {& y6 {
]
( b! d3 D: Y* R% Y2 m. W/ c ifelse show-energy? d! K, {/ ~" L2 S" `
[ set label energy ]9 t/ _0 U0 _; v( v9 v, D" ?
[ set label "" ]3 o, C$ A* G4 F ]" M- y5 a3 o
]' A- B$ }8 `2 E( _! M$ G8 N: R' ?
end6 \) h% a" p" a) B
to reproduce6 J/ O* i0 C5 f0 q+ u1 |
ask turtles [ ?% r1 E8 Z7 F* j
if energy > 50 [
! t, B Z! p5 p3 K set energy energy - 505 U. {9 d: A5 E$ `- Q) v
hatch 1 [ set energy 50 ]9 V' i+ `1 r) _. w5 l6 ]
]8 ?( b1 S; f% b9 S& w9 I6 K! A
]
9 n( X, {) S7 w# r, r+ T2 ^! A1 jend' p2 L" s0 Z6 e
to check-death, Z$ m1 Y1 s% V& P$ \
ask turtles [
# v/ U& G1 ], k, ~ if energy <= 0 [ die ]& a `0 j; N* k8 z3 P
]
* s) \3 C' d$ w" O$ w6 Fend
6 q1 c l: x1 ^6 [3 r, I) N! I; Y# ~to regrow-grass
9 V C4 K* K- O7 D ask patches [+ [& G/ ?8 _2 ]: l& J& t. e
if random 100 < 3 [ set pcolor green ]* Q4 |8 w& t o- n7 x- z
] \/ r' p3 s& Z% [, |+ C8 M
end
4 g9 q, H6 @6 s* d& o, S3 e6 dto do-plots
& H% E( |( _* \1 S }) A5 ? set-current-plot "Totals"% p3 ^8 u' ?4 P$ k7 z; E
set-current-plot-pen "turtles"
( {4 s/ {# V" }9 A* Z3 R plot count turtles) {9 t% O& J+ Q$ p- p# |* U
set-current-plot-pen "grass"* }9 S; K$ P0 F) Q ]- q
plot count patches with [pcolor = green]! l; }2 l! |$ S. o8 z
end+ S( u' M! ?* X5 B
可是运行时提示no such plot: "Totals"
& s) P2 k; _+ z7 N& i3 `: Zerror while observer running SET-CURRENT-PLOT: G' u9 B. g: O
called by procedure DO-PLOTS2 v+ ~4 x' A3 G! t' s
called by procedure SETUP
. q- U7 C8 _* e& o1 Q3 j called by 按钮 'setup' @6 Z9 y" S4 Z6 E1 u. |1 K i, P
求大神解答啊 |