我编的程序如下turtles-own [energy]; s, X$ H$ M/ j" W4 U" T8 M( [+ B
to setup
4 u5 Z, r* _$ `% t- A clear-all. x9 Z) ]* d' Y
setup-patches4 |0 }5 f$ ]$ `, v6 s& W
create-turtles 100
+ _( l% f/ D8 s$ ?5 t! u( d. t do-plots5 W/ H- x N- C0 c; i% M) j
ask turtles [ setxy random-xcor random-ycor ]
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to go
9 H- S' ^+ g4 I9 T2 F4 | move-turtles
- f6 v |2 G; v+ A. V+ A' J eat-grass
! }) s3 M2 O3 N# x% r5 j reproduce
! }/ P( E) m0 v check-death9 P) o# P- h) G* q$ A x7 `
regrow-grass
* p, i* p! z; c do-plots7 Y4 \1 B7 D6 G ?1 C
end2 k' k7 h5 S& i+ p6 s
to move-turtles2 a2 j. o/ X5 m4 U; a" ^
ask turtles [* ?9 S/ L: h: n) F$ y
right random 360
" j0 y2 p- r' z' y- e( d forward 1: K0 I/ I; u9 x( |& `/ a
set energy energy - 1
) d: @" k/ q T! r& Z ]
8 S# l, P6 F4 a+ Xend
H) \3 t+ X2 L- G" hto setup-patches7 {1 v% z8 J* S$ T! @# k( `5 }4 @
ask patches [ set pcolor green ]
6 A; r! N7 a. n) Q" Xend
. \. ]4 f( P# F$ kto setup-turtles1 n/ \+ v/ m5 d+ R" q/ Q
create-turtles 100
& }- V+ T) i' K) U1 r ask turtles [ setxy random-xcor random-ycor ]
4 q/ y- c: t L p/ |/ X2 {' I9 G' ^end- E* r! u9 \. w4 s/ X2 d" L1 x
to eat-grass
& \8 z* O* ~ i3 l K ask turtles [" w8 d; H) n7 K$ g3 o: p0 z6 k# G
if pcolor = green [
8 o" L! c" e+ _( P set pcolor black6 {0 Y' W, V! d2 M
set energy (energy + 10)
0 Z0 h* d. F) T ]
u2 ~% w/ U+ f8 ?6 D0 h6 e6 U0 I ifelse show-energy? R) z* R2 D. j1 V
[ set label energy ]
0 F4 K2 u. H! `% L6 U0 Q [ set label "" ]
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8 e x9 a+ I/ qend
' ]) j& Q9 [6 Q% P! M7 B) Mto reproduce* B' A, {) y. n& j; L) L
ask turtles [
; `. p; \# P* Z' V1 D if energy > 50 [5 d2 O4 c! _; X! m* ^, [4 G7 e
set energy energy - 50( i5 v( n/ A, e6 L: F I
hatch 1 [ set energy 50 ]
8 w0 J' i: e7 X, P0 \ ]
+ ^3 w6 t( J4 I1 k ]
+ I6 O9 C# i. j6 R2 oend
$ K. f: [( `/ D* V( c" lto check-death
) |* K& s- R. f$ W ask turtles [
7 ^$ }9 K1 {0 W$ z7 H/ Y if energy <= 0 [ die ]1 Z! T* ^3 L: d T/ h. J& C
]
$ q+ q! c, L4 A7 P1 vend
* a9 q. v6 P, y4 ]! _: O( |7 Hto regrow-grass8 O. @( f& Y7 ?2 X6 b0 L# O* U) I
ask patches [9 m) f: G- L3 a+ Y" D" i$ J) O
if random 100 < 3 [ set pcolor green ]; ^" R7 W( G0 A, K4 Z
]
! D% W3 _- p( K, M, pend5 D' b4 X4 {! U1 {5 r
to do-plots' c' `, P# R! i) ?7 C2 G/ Q
set-current-plot "Totals"- Z' K- R; f+ q# o; p
set-current-plot-pen "turtles"( q9 L/ y, M U1 U4 i
plot count turtles2 Y9 i4 w ~5 \# z6 N, v+ w z
set-current-plot-pen "grass"7 s$ V5 j/ Z% T& ?, I* p ~' b; t. q
plot count patches with [pcolor = green]: A4 }9 u h6 j( f4 a3 a D W
end" L( P; N8 G V7 O. Z: X" O) g
可是运行时提示no such plot: "Totals"* P4 a$ I( Y7 p+ M7 O
error while observer running SET-CURRENT-PLOT' h# O: ~, z( U; k8 k
called by procedure DO-PLOTS& O5 t* y5 }+ M! t* O0 v" j, [
called by procedure SETUP
4 {5 E5 E2 G7 }; d4 Q called by 按钮 'setup'/ C9 [% I* U4 p! _- l( o
求大神解答啊 |