我编的程序如下turtles-own [energy]
. W* i/ U, T& N% j' k9 Mto setup
6 b" s7 V9 c# _5 t( X! I) W- c! t clear-all
' Y( l9 Y" ~! }: D setup-patches! I* P4 q6 x8 L" Y0 z- N
create-turtles 100
" |, D% v& a& I* L! S0 E% } do-plots9 K {8 u3 O2 {1 x; T
ask turtles [ setxy random-xcor random-ycor ]
" K' N7 d. r# Y# s6 n1 yend) z: E# J8 s) {- K$ |
to go7 a8 N2 M) p+ q' B* \% f! h6 n* g
move-turtles) m6 i: R5 z5 A. I) f4 E+ b
eat-grass
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check-death( m: V; q/ E5 i- U5 C
regrow-grass
- s9 `) P9 r# K8 Q( E* n do-plots
8 Y6 \3 i& ?6 b' ]5 _end1 h4 X8 d' U c7 B. u% r
to move-turtles
, s$ h6 V: J6 H4 ?: A6 E/ c( O5 h5 Y ask turtles [, `2 s, \! t. j- i7 f: {
right random 360
; g; T- U9 y! t# f5 }# E# m forward 1
0 m5 a, ?( S, }9 m+ V set energy energy - 11 ~, n: B3 q; e2 y( W# P$ G
]
3 N6 T% ]! L Rend& w8 Y' a, s2 r, u D2 K9 Q- c% t
to setup-patches6 I6 h* D8 m0 `$ H5 N
ask patches [ set pcolor green ]
0 z* i* }4 i- n* s4 Zend
8 K0 r5 j+ \; q2 ` ito setup-turtles
$ c3 r o4 s6 A4 M8 ?4 c) X+ f2 j create-turtles 100$ R. m/ Q, f) K3 B0 J ]" Y
ask turtles [ setxy random-xcor random-ycor ]8 O5 U6 E3 p/ z, r! a2 _
end
: s+ j* u5 b3 K: fto eat-grass
" M6 d! E; X1 s ask turtles [1 J, D3 L5 ]- J& a1 I! m5 m0 e
if pcolor = green [
$ v: ?- h. r$ I% R- U! c4 p0 ~ set pcolor black
6 t9 U! M' r! h set energy (energy + 10)- O) f% U9 f4 l( x
]+ f1 F- a2 c/ d$ [( Q
ifelse show-energy?. V; I5 [* t1 a5 m0 _1 ^, h/ s4 {
[ set label energy ]
, B8 l2 G' v5 w8 i. L; Z7 r [ set label "" ]
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end# W0 i+ h9 A% D3 ?0 j- y) B/ O
to reproduce
& r& K. N* k8 ]/ y8 |' f m3 D ask turtles [
7 @4 V. q3 R' X& M, V# D( e8 l if energy > 50 [8 G# S4 }: Z5 f3 r7 {6 U J" w* ]4 D/ h
set energy energy - 508 N0 {. y3 ^' \! L$ g
hatch 1 [ set energy 50 ] _$ v: r& i. V# r
]
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end9 R, Q0 t1 ~ v5 t( B6 V
to check-death+ w( q; i, @% l$ D" U* @
ask turtles [2 u$ M7 u2 i' D3 v% [/ ]* I
if energy <= 0 [ die ]
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end
4 j' l R# s7 ]+ R4 S( j. x1 G5 _: Yto regrow-grass
& ~9 e+ L; V: F* o ask patches [( }5 V3 W- v$ J
if random 100 < 3 [ set pcolor green ], L* W: b, Y' ^( P6 ]3 S
]
; t5 ]/ t' T1 |" y5 ^4 yend
N8 ~' ^8 b) ]9 ^4 pto do-plots
) a1 f3 C$ L% u7 R. D1 `8 f set-current-plot "Totals"
; U) P3 Y# k, O set-current-plot-pen "turtles"! n* y( W3 B+ }3 r4 {
plot count turtles
* R4 T) M. k: M7 f0 j( }5 H set-current-plot-pen "grass"
6 g9 M7 d, ?+ V. |4 {7 _) P plot count patches with [pcolor = green]6 R* f# Y" k3 d# d9 |
end% W# b# |, V5 i% B: J; `& Q' \8 o
可是运行时提示no such plot: "Totals"; y8 ~' Z' y6 N1 N4 f4 A; O* ]
error while observer running SET-CURRENT-PLOT
) F9 x$ V* j$ m; e( Q called by procedure DO-PLOTS
: ]3 I0 O" `0 k& c called by procedure SETUP, R0 R/ Z, @: p( N
called by 按钮 'setup'
# D7 O/ z4 w9 J% }求大神解答啊 |