我编的程序如下turtles-own [energy]
+ b1 {* T2 t) H- ito setup
4 `' o1 c2 `% Q& ] clear-all
& Q4 o/ p( y5 w setup-patches
) u- u6 R9 O" P7 r' n. a create-turtles 100- b9 Y( x$ @' g5 p8 M! j9 o: c
do-plots& a2 q( X1 ^3 I. Z) p) X: u
ask turtles [ setxy random-xcor random-ycor ]% n1 r C7 w& p) j' j7 @- p
end' R% ]5 `% |% Y3 i% i; G8 u: [
to go* u+ M$ m0 n0 I! k' @( D7 M
move-turtles
5 m2 p7 b. R2 T: ^( ~3 @ eat-grass7 }5 P; p8 v m0 b. h, N3 Y5 Z1 o
reproduce- K" L. W* Q2 i2 e- }9 i3 n3 Q
check-death" Q2 f# F7 Z7 O7 |
regrow-grass
G- c3 Y: t/ I/ n; G1 u do-plots
. ?1 Z o$ L7 L! q; M8 R! Uend. g+ f3 ~7 I* R/ ]7 ]/ B- z
to move-turtles& q: A- {: S9 O' U3 A. l
ask turtles [
: q }; @" f6 ^- l& _ right random 360/ B9 L5 z) Q* F
forward 1* z# \0 c9 r8 O; X2 @0 P4 w* P5 e" S
set energy energy - 1
6 ?4 D' g$ y% m) G ]- d- x8 y5 ]/ ?: F' ^: E
end$ u% y7 k# O0 p% X
to setup-patches: Z) @# L9 I* c/ U O" Z1 v7 _3 F; i0 r
ask patches [ set pcolor green ]
3 J1 ]# p& w, d, V8 I# b- F# {end" Q! _7 j1 C9 W/ k9 p( d9 q. T8 z) e
to setup-turtles
4 X* H, ~9 O% h. @1 u9 y8 r" Z& ]4 W create-turtles 100
, p$ R: V- d' O( w5 a) C ask turtles [ setxy random-xcor random-ycor ]5 @, j% G+ s7 P
end
2 G. F3 @! Q' y [6 Wto eat-grass% F( S( @" W8 e, Z* h M
ask turtles [
# B: g l2 ?; i: P& G" B5 @6 R if pcolor = green [
; g. X8 Q1 y- u+ _6 h set pcolor black/ q! y1 Q9 T) s0 B4 @! k4 Q
set energy (energy + 10)
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2 n6 P/ o. `0 B6 K- b$ i; A ifelse show-energy?4 L( k, b8 j: X# J6 }1 W& X7 a) W, C
[ set label energy ]
5 u# z: n% [$ n5 B [ set label "" ]; ]$ {+ X* j8 V& {" W1 C, T% g
]
$ x3 u$ M: E* S1 v8 Pend/ X! G$ i; j" o: {" r1 H+ A1 F
to reproduce
) z+ x. d# a: h" ` ask turtles [
" J$ k1 f+ l: H! |( x# M, O3 p" L if energy > 50 [% m9 v, c- h. ~1 b( G1 V9 d
set energy energy - 50/ k( d- P5 p) F& t, I
hatch 1 [ set energy 50 ]- V, E( ^' w' M( C! i
]
7 ^; B5 Y3 x; |/ ?! n ]
1 ?* k2 o" r, m) F% u+ P! m& L& Wend
2 F7 l1 o7 W, N2 Vto check-death8 J: _2 V2 T5 I# Q
ask turtles [: x) u1 _) B' w; M. B0 x9 P
if energy <= 0 [ die ]
! l% D6 i4 P( i8 G+ R7 ]- W0 [ ]
* r6 W( L7 N2 L: X/ w) G0 oend
" a9 ~* W. e( z: B4 @$ K* [to regrow-grass
" u6 j$ C* r) y ask patches [1 q0 Q6 C2 g' O# A; ?$ j
if random 100 < 3 [ set pcolor green ]. M5 y( e9 k$ }8 Z+ W9 X4 |/ N
]
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to do-plots
& Z; W. _ W* N7 | set-current-plot "Totals"
) c R& n* @5 r2 h- O4 J set-current-plot-pen "turtles"- ~" l: u, d" [% q" F* `
plot count turtles2 d6 t9 [5 f$ f F3 }( Y0 K! S) `0 l
set-current-plot-pen "grass"
) a( J- H2 D' z% f4 C* n plot count patches with [pcolor = green]
/ S0 Y5 S, W& w: j8 `end1 f/ ~1 ?( D- |5 y5 |
可是运行时提示no such plot: "Totals"3 H9 e5 B2 h9 ]
error while observer running SET-CURRENT-PLOT& ~5 }, t0 f }6 ?& X
called by procedure DO-PLOTS$ |5 l1 q* S7 [
called by procedure SETUP" Z% c6 C! F/ ^4 u, T$ Z: |
called by 按钮 'setup'9 F( R& ]6 k* ]6 o' e3 {
求大神解答啊 |