我编的程序如下turtles-own [energy]4 y' g; r/ M9 P, P, ^6 S- Y" {! F
to setup5 _6 }2 K, w- V; h" H/ b2 Z
clear-all
' D5 |; D5 W8 r: y setup-patches
& o- E$ {* b O create-turtles 1001 o( J7 g6 J6 X# ]4 a
do-plots
5 z8 E# P$ z) D5 j0 ^9 n& ^. G ask turtles [ setxy random-xcor random-ycor ]( i& v$ k/ `. o& N5 v0 r
end
. Y$ V# j3 i) q% K* Z! V! y$ gto go
2 {5 q: `: F1 m. g. R move-turtles# X f; W7 q" s9 [6 {/ U
eat-grass! x! d2 H& |1 {- r& W0 `
reproduce
) \/ V' D8 P. x- e4 L# I4 N, G check-death( f- U' b. r. }
regrow-grass
+ Z/ Z0 g% {$ j4 E1 ] ~4 L) `, | do-plots1 O1 U7 t4 g) [" j! s' L% g9 U
end
* ~! Z8 ?1 U9 Lto move-turtles! x4 L# q6 X0 V3 d2 G" p
ask turtles [
& g$ K. U+ Q: L: @+ J# _ right random 360+ P3 [6 z: f4 a
forward 1
8 C2 t0 l7 g$ s3 }' F+ F I set energy energy - 1
m% M' i* E- K) V5 ~8 ^( O; M ]
8 J& Y. j l$ J6 ?4 V2 Lend- v: q- { W8 i5 ?, I1 U
to setup-patches2 [+ T8 A7 W7 a! k8 F3 P8 f
ask patches [ set pcolor green ]
. ~( T2 i2 N& Kend
% H& L( u2 p3 K( j* Uto setup-turtles
3 ^9 n5 W" f0 G( Q. a) g create-turtles 100
' ^- s0 k: k7 v3 W% G ask turtles [ setxy random-xcor random-ycor ]
* V0 x" }1 f, \) aend
# ^- _8 d- ^* Y' E3 ~ h6 Q# Y+ Gto eat-grass
$ Z+ b5 c7 i) D: _# a. k+ t# C ask turtles [
0 ]# C z- L. a$ o; } if pcolor = green [
5 o/ N$ H7 a! J p1 e2 w/ q5 i set pcolor black
& b0 l+ E, N6 X! ^) F/ | set energy (energy + 10)
@% I$ S- V% S7 I ]
, E% [! [( u4 z h ifelse show-energy?& h0 Q/ W, i$ c- t7 e! R
[ set label energy ]
7 [. B- k, X, \- b [ set label "" ]
3 [* i$ g8 y8 h0 L9 F) t: W ]
- X. x4 N6 {# |end
' ?5 v0 C4 C! @to reproduce! a8 \2 @* J6 k9 @
ask turtles [& Z/ Z F( T6 W; A
if energy > 50 [( E$ a7 \! x- w. N2 h
set energy energy - 50
$ J* v: \" z" R" F- Z hatch 1 [ set energy 50 ]
& B8 Q5 r$ u+ f! k ]
! O* i ^2 y! q: k- r ]! M/ K& ]2 s* @( W$ }
end
+ d! K# q, B7 K3 S! j& Fto check-death3 l% @3 v$ i7 x) o1 |
ask turtles [( L0 h& k9 o( e3 L7 \7 m/ d
if energy <= 0 [ die ]
5 w- u1 R4 L3 z4 Z ]. F6 k9 @0 P) [+ r/ x
end
- N& H ]4 T( k) X1 V, r! S% rto regrow-grass
) |! |. ~' z7 D( T1 d' D I ask patches [
( T% I% X4 y7 t8 x8 X7 u# P if random 100 < 3 [ set pcolor green ]& o3 }; Z1 n& \1 X* L6 b
]
( d4 Q- G7 w- a5 f7 V5 u% H$ ?$ Mend
2 k' N( X# p$ Cto do-plots: u6 B, v9 V) h7 W1 b/ Z* j+ e) f4 f
set-current-plot "Totals"
3 {* G7 _. t9 t& p. M: Q set-current-plot-pen "turtles"
3 k6 z7 B8 K/ G' b# ]* x. B. L) S plot count turtles' ~) D9 j; z7 H6 V0 [
set-current-plot-pen "grass"
3 u% C/ \+ V: D* P8 A: f plot count patches with [pcolor = green]7 G8 Q8 V& G. [& h
end9 a4 ~8 j% [" X) w, t: _
可是运行时提示no such plot: "Totals" Q0 R$ C% a' h, ~+ B* d
error while observer running SET-CURRENT-PLOT
' x$ ?% ~' {6 Z% K9 b2 j7 G called by procedure DO-PLOTS
$ h% {' ]/ C' [ called by procedure SETUP/ {* x$ z+ {" ?7 b% A
called by 按钮 'setup'
% P+ S" V7 P+ M( ?$ O! o求大神解答啊 |