我编的程序如下turtles-own [energy]
, x5 S( H) [7 p; h7 v8 gto setup
8 V; o+ @6 ~9 O$ ~) O; T clear-all
\, q- ?# _, U; c/ _$ d% c1 d setup-patches1 L5 p; ~9 u. O1 H2 d' Z
create-turtles 100, I9 ^7 r, |* K4 n/ S+ Y
do-plots J* W7 \. e. G' W) B2 d0 k3 P- K
ask turtles [ setxy random-xcor random-ycor ]
$ p. u6 f+ N" E' Z% Bend
( m' j7 K" Q. P7 Cto go1 I" e1 h# m- l r
move-turtles& [/ T; v$ n% X2 E7 Z5 T
eat-grass
7 `' k i4 k( q1 S9 G reproduce
- M3 w$ u" Q6 m- @ check-death; g7 V$ s3 l+ {: c+ ]7 |
regrow-grass: [- d8 O5 M( O# ?5 z6 c" d
do-plots& C5 K! X# j# K" r# p
end
6 B. Z: F7 M1 l: S H) b8 J hto move-turtles5 B; w" h0 M" A- Q* X5 `
ask turtles [" o% |- s% ]& L8 b. R0 {* e
right random 360$ Q- g, s. |- L* L1 V- ~5 b
forward 1
( e2 P0 o& s- [8 Y& ]# S set energy energy - 1
% g/ S7 h8 n8 r$ o7 {8 j ]
3 T0 h2 ^* T, r, D8 j! V' J7 qend% B3 ?- u4 Q* o
to setup-patches
5 X+ s i- `3 s ask patches [ set pcolor green ]* |; F3 r7 }* @1 D
end" ^! M: o# z0 X0 e' j$ Q$ h
to setup-turtles: z- e% l9 E" ~, B* e" p0 A
create-turtles 100
/ n/ ~( P; ~6 v( `( M* V ask turtles [ setxy random-xcor random-ycor ]
* h; q- w0 p/ g" y9 I: fend: l8 z6 X x1 H: S* }3 J8 T
to eat-grass
0 c* G1 ~2 N8 m/ |; O5 X2 Y3 B ask turtles [
9 l! Z- H' p( ~3 t" b. ^ if pcolor = green [
* D) Q0 Z# E; Z% @) u5 a& c set pcolor black) u* T) z) A1 ~' I4 o7 S$ j
set energy (energy + 10)# {* T6 `( p! x( l; r
]
# Y0 c! L- y2 I ifelse show-energy?, h# t9 j' N6 y3 B# M4 a" a
[ set label energy ]
: \: n2 m! p- S# |# i1 L [ set label "" ]
9 F* g+ y$ M( u5 y ]
3 x0 V& K% [# eend3 f' t0 N# E5 o/ t
to reproduce' x8 D* q# m. |/ i, m8 J' n8 n
ask turtles [
8 }# M, U; l4 K& C8 ^- l8 \ if energy > 50 [
; x3 Y# Y- m$ Z4 Z3 F8 E set energy energy - 50
+ w6 u A# o! c- ]8 s4 p8 t' X% o& O hatch 1 [ set energy 50 ]$ c6 T% T( F' Q: M$ y: e( @
]
! m$ r4 P4 V) q8 U* ]4 ]+ m5 K ]* N! `2 u4 t9 d2 z
end
$ a' j6 e0 X3 j7 hto check-death
2 d! i, O4 h6 r5 t( J, r. @ ask turtles [
7 @% g: V& i% p+ a [. _/ U+ g if energy <= 0 [ die ]
4 |( r; y" X A% S ]( h3 T/ a* d. {5 @% b/ W
end
7 z) J N3 J. y1 W0 Uto regrow-grass
/ K$ t+ [7 t4 }, }# w$ n; x" j ask patches [
4 B' S. D+ d/ n# f, g7 J) { if random 100 < 3 [ set pcolor green ]7 Q6 |5 S! U0 ?7 ^- k
]
* F5 D0 C# ~+ o' I+ ~# qend
' S! P, v' l9 h# F. j) Gto do-plots4 o. R2 u( C8 R# ?1 ^# ?1 z
set-current-plot "Totals"# O' U! X8 P6 @4 v- k* t1 o
set-current-plot-pen "turtles"3 y0 j: u& r3 o$ @- ?1 y/ q
plot count turtles
+ R3 i" t, U% t& ^5 ]- m set-current-plot-pen "grass"
. P: r5 V) T+ T6 R plot count patches with [pcolor = green]
9 V# V8 a6 P! z3 v! L2 o8 q$ D; u( bend
G0 m8 r- n) f6 ?# K+ Z z可是运行时提示no such plot: "Totals"
4 u5 _% r. k( v1 g" m9 ierror while observer running SET-CURRENT-PLOT
* }% J3 Y' q- U+ W9 g) k1 e: t called by procedure DO-PLOTS1 d. s1 m5 y. I
called by procedure SETUP3 i2 Z* \! B: t
called by 按钮 'setup'/ g, _ }' y. n* {1 N9 y# i) I0 C
求大神解答啊 |