我编的程序如下turtles-own [energy]* u9 T! W0 a$ e* n9 U) G
to setup
; a' G% _. j0 J# b0 N clear-all
; d2 y5 x: {; C; f; j setup-patches. Z) [1 |1 h8 ?; o! I
create-turtles 100
. z s* y8 B- b7 t5 a- ` do-plots
$ b0 i' p7 u3 ~/ W ask turtles [ setxy random-xcor random-ycor ]
& L7 F& A7 D3 ^3 K3 Z# Z: z1 S: Oend* T: n/ a* W+ @& Y: ~3 a+ u( N) j
to go
+ Z V# a$ f* b d; X4 W& a8 Z move-turtles( m2 R# I0 L) ~/ |0 C0 X
eat-grass
m! u; f8 h1 J, G4 _- y( C' E9 X reproduce2 l/ y1 L% {0 k8 v+ M2 o8 p; B( k
check-death
( o2 Z3 y6 g7 ^, p regrow-grass
7 f! ]; v' N! M. J: c5 N( k do-plots' b& `6 h7 y0 x* l8 ^4 M4 g
end
4 ` }( Y3 P9 z0 a$ @to move-turtles
& n, V* V X* F0 t ask turtles [! I+ N8 f f. Y1 d0 c- g
right random 360
9 k* Y5 q' k- k; |. I4 z( I forward 1 o' F4 T7 P; Y% Q0 |6 y
set energy energy - 1
0 R2 ~) L5 q6 i" ]9 u ]
3 X3 S% m- ~ n! i, Gend) a7 z) n, j# u U4 U
to setup-patches1 l& K% e! F1 Z% {( x0 O( T
ask patches [ set pcolor green ]
: h2 m- n0 p) p% Lend3 B+ D( y3 A0 V3 [
to setup-turtles" w' p; h9 `" Z) [- z4 G+ X) p4 l
create-turtles 1004 S4 r0 A0 V8 S# ^
ask turtles [ setxy random-xcor random-ycor ]
5 w' Q% t. u9 Q* m+ M4 o# Xend5 s- l7 m. N( M' d0 |% _3 l6 z
to eat-grass
- X# d3 ` s' ~4 i' s ask turtles [
6 k/ g/ A5 _3 Z6 k if pcolor = green [" H# Y3 Y: c( l% v
set pcolor black' {2 d) d9 {: |0 `4 Q" x
set energy (energy + 10)
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7 Z( c/ b/ [ Q( W6 l O ^ ifelse show-energy?3 @) u" y, V- n# b5 Q$ K: N
[ set label energy ], B7 A) X0 Q7 o: i! V
[ set label "" ]0 E: H' I; Y. c
]+ l4 i2 F0 o) M8 _! {
end! w% ]1 B* z c3 @3 g
to reproduce+ t0 }) F, R! a; u$ d
ask turtles [
/ Z7 m& @; L" J- { if energy > 50 [; I! B2 \# K8 t6 x/ T7 x
set energy energy - 50
* D$ y3 y$ G. V+ `4 e hatch 1 [ set energy 50 ]
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]
/ K) ~4 }5 _) A7 jend: P: H4 ^' {' H- L4 ?' K
to check-death
/ } T6 c: p7 k8 `7 G ask turtles [" G( B5 k* ^$ j
if energy <= 0 [ die ]- A; S% E5 M7 A' ]+ ?3 N6 e. _
] [. ~& s% d, v3 K F
end8 M' c! i7 F- `5 X
to regrow-grass
& V# m1 Y- F) x: a3 W9 d ask patches [
% s5 N7 F3 F. d2 y/ r! t0 U if random 100 < 3 [ set pcolor green ]
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end+ a8 |; k: h4 v8 N8 B5 }; m0 b
to do-plots
; K6 T) K; K, v, {2 Z set-current-plot "Totals"5 V6 \6 G+ |2 }( ^. W4 i) I3 O
set-current-plot-pen "turtles"/ W( j8 x% F2 S: W( [& G
plot count turtles
8 q4 v* B$ |3 o; O0 b set-current-plot-pen "grass"
0 r" J& d+ j2 F4 H4 T plot count patches with [pcolor = green]3 D4 P; h+ O. A$ H" L4 p# ?2 [- n
end$ w$ r8 K D; l' ?
可是运行时提示no such plot: "Totals"
' ~! x# i4 U6 X/ W7 y1 Zerror while observer running SET-CURRENT-PLOT
4 h% T6 _( W4 i- ^" g& t0 ~ called by procedure DO-PLOTS
- v4 n1 Q6 A$ y" _% Z1 @: E called by procedure SETUP5 p6 L: D! t( Q4 j& f8 b2 `
called by 按钮 'setup'0 b7 Z4 ^3 u( U% ?
求大神解答啊 |