我编的程序如下turtles-own [energy]+ X- _! f2 E1 J5 \0 L
to setup. K: A* _. m1 h* L! N7 G, v' ]$ Q) b
clear-all _! K8 z- Y$ Z$ h
setup-patches
: e8 |& A* P- w3 | create-turtles 100: Z9 d0 G) J9 \$ [( h; M" x" f% e
do-plots9 N+ w) W: H9 k1 H, J0 Z8 |
ask turtles [ setxy random-xcor random-ycor ]
. H* P, I) K3 z+ P: m% c8 T2 d- uend
9 r6 M2 e: _. Eto go
4 v+ K, z9 O- J3 ]& Q! q move-turtles
$ C; u) f+ t0 E eat-grass2 f3 j- v+ E4 g/ G4 z
reproduce
D- d9 Y: d$ z3 l1 f check-death4 y& M+ ^- g! {( }5 h l7 t
regrow-grass, X* I X+ @( W F/ H1 Q' |
do-plots
# H5 O, Z; w2 ^& X T9 Bend% n2 i _1 P" r1 f
to move-turtles1 f( i5 w9 o0 I3 b9 N% \5 |3 M; f
ask turtles [
6 m$ L% d7 M( m( L2 Z" @+ w right random 360$ n0 W; a3 |: K& z* m# G- \
forward 1
1 ^; S9 V0 _8 Y% p. v6 ` set energy energy - 1
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end' p- B) j# o0 `# E) F7 W* P
to setup-patches$ V1 a1 M/ Z( |6 W- [8 B6 D
ask patches [ set pcolor green ]* y; `5 e; z: Z3 Y
end/ J! ? g& Y' v$ j- v( p
to setup-turtles
0 c, O; P1 W& c! B! W/ Z- W s create-turtles 100
0 K3 b: S2 Y1 I- u1 J/ x* A ask turtles [ setxy random-xcor random-ycor ]
/ j5 ]: {! ?; _! m- A7 xend
" ~4 Q/ O* [4 \5 Kto eat-grass
* `' g$ c+ ^0 a" A+ F ask turtles [( l# P, p N. Q0 n! `4 p) l
if pcolor = green [2 T2 y6 S3 P; r$ y5 x+ U: {
set pcolor black8 T7 U+ D- [$ B0 P3 |- k: k6 C: X
set energy (energy + 10)1 V& B3 Y$ M7 J1 z
]
( K- ~9 j% t3 q% d" J$ s ifelse show-energy?
$ c: q4 L! |- G5 i3 S- a2 l$ @ [ set label energy ]
# N- e6 k0 G7 B* } ?) ?" |+ h [ set label "" ]$ |6 r3 c/ X l0 O3 }) j% F
]$ [/ o# T$ t) U7 o
end' ^2 h5 G6 j2 y% _
to reproduce1 a) B# {3 m2 H* g- _ r
ask turtles [$ j% b9 T2 Y4 s( L
if energy > 50 [
* P3 t4 a2 t: H2 {8 H/ W set energy energy - 50" N) X$ Q' M, U7 z9 ^: u+ X- J
hatch 1 [ set energy 50 ]2 n# C# x% \, E2 `0 Y
]
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end- S3 V6 w% k. C) a; l
to check-death, k. W4 o% h* s) ~3 w" ]7 p- J
ask turtles [* ?( H! a- S2 }; x+ C) U. c( ~
if energy <= 0 [ die ]1 |9 K) r- h+ T! R6 a$ y( K
]: ]( Q5 k _7 a6 ^9 n m5 I
end, a8 M- V$ h' s: \2 |4 O# ?0 i
to regrow-grass% ]8 s' R3 L+ V& E% O
ask patches [& L* g: c& k+ C. p: b. o/ ^
if random 100 < 3 [ set pcolor green ]1 k& G- e9 S9 g
]
$ h% c( \5 W1 u" [end
# i3 `$ S. J9 e8 o6 F* n6 q. Eto do-plots
& w$ O' n0 P8 s9 X. j' R# ~ set-current-plot "Totals"- v2 z0 v( l4 O. M: L" H e
set-current-plot-pen "turtles", Y4 r6 T- g! @% A+ }
plot count turtles3 j8 I0 n2 x: g- U
set-current-plot-pen "grass"
- s( H: `4 j' i' u plot count patches with [pcolor = green]
, U: C6 k; N4 Iend9 E: r9 S( t1 D8 b
可是运行时提示no such plot: "Totals"
8 n4 ^7 R" [3 V6 kerror while observer running SET-CURRENT-PLOT' Q/ t* \% r+ b
called by procedure DO-PLOTS
2 Q. G( L- z L. O0 g8 X+ m called by procedure SETUP6 @0 d6 Q8 f p6 o
called by 按钮 'setup'
& W% n4 J) s' g求大神解答啊 |