我编的程序如下turtles-own [energy]
, N8 N- l4 L9 ^6 t4 t5 E4 jto setup
0 R) q$ B5 z1 r3 A1 Y clear-all
- F! a1 ~& H% b8 K' D( x/ F6 J: U setup-patches- X8 x/ D9 V0 R+ m
create-turtles 100
; r7 `; F$ V. @ Q/ C6 t5 u. M do-plots
+ ~" _! w2 H; X/ p1 f# p ask turtles [ setxy random-xcor random-ycor ]
( g/ R3 z' W# m8 J$ y! qend" h$ S+ j6 o: g! b; t
to go
. S- g& ?3 B3 A7 i! ~- b move-turtles
' G. O1 [) d; y& U5 y eat-grass
+ v6 `0 F$ `2 ? z reproduce6 E, b2 M9 e3 T
check-death
: p# o5 P9 t `5 R; y1 T; h regrow-grass( n$ L% g" K& T) z
do-plots
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to move-turtles+ J7 {# ?7 }- J( B1 d
ask turtles [
/ g- K+ N1 N! L! E right random 360
r% C+ e# M/ P/ y forward 1
( E6 E- o2 L4 S, O# A6 O set energy energy - 12 B2 X# |9 C8 e m3 q
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end% Z& ]4 l$ F9 m1 v. T4 i
to setup-patches
5 W1 J* W! \2 c( B* w- L7 R ask patches [ set pcolor green ]+ S. \2 a7 v+ u& Q( D5 L
end- v# A; q$ a9 ~0 F; Q% e
to setup-turtles
% g. M; `( l4 ` create-turtles 100& P& p' y$ k! N8 g9 H( w
ask turtles [ setxy random-xcor random-ycor ]6 n1 C9 g+ I3 x/ J$ j. P/ Q
end
" ~6 `, Q) P M; hto eat-grass
: A9 A- B6 X* f1 N ask turtles [2 X6 p! v# k S4 t* u) |
if pcolor = green [
' `% z: C9 a( A" i8 ^+ ?7 { set pcolor black
: @9 x& R* l5 L |4 z) H$ r set energy (energy + 10)
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ifelse show-energy?! t9 Q4 Z: e6 ^" r. l
[ set label energy ]
; d7 v6 T! {5 @. z [ set label "" ]* |- o, Q8 X$ ]- ]2 U0 J; b
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end
/ Y% x4 w7 O9 j/ l8 i; r' x- Ito reproduce
/ P2 b; |1 R0 G7 ?1 k8 q3 h ask turtles [
* g/ S9 X3 s4 U V6 k" [- l0 X& t if energy > 50 [
; l* v8 v) C* B+ P; i% ]- r0 O$ a set energy energy - 50# |9 E3 K8 g O0 Q
hatch 1 [ set energy 50 ]
$ C4 k) t. w8 V3 L7 k ]
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end$ E' W3 Q `7 G7 J) i8 o9 M& ]0 @
to check-death
0 }! h* p ^2 K- h4 |$ a$ K ask turtles [
" t" E! O2 X: A6 x% f if energy <= 0 [ die ]
+ ?2 p; \/ }* x( M+ o ]
$ B8 U, `# [" ]& z) D9 B. |end4 T* y$ c4 w$ n; \9 I
to regrow-grass# x: O0 d4 ^; r# K1 D1 F
ask patches [
% J' @# x: W7 v6 O5 I0 t; Q if random 100 < 3 [ set pcolor green ]9 m4 t( J' N$ x2 l* [! m
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end
% U: R+ ?* D5 t0 }to do-plots) B- q/ L! }. w2 N: `; @
set-current-plot "Totals"
- a2 P" O5 A" {) t6 [* I set-current-plot-pen "turtles"
1 X1 V; I v/ Z; f4 o' h& q' A plot count turtles3 A( t8 M8 B% |! G) I
set-current-plot-pen "grass"
6 c1 C5 S2 l# y+ L6 u6 X plot count patches with [pcolor = green]
5 W( U" ] N Fend5 Q$ X# B& d: {+ i( d1 D, h
可是运行时提示no such plot: "Totals"- q X% I$ {# k( Z
error while observer running SET-CURRENT-PLOT
) W0 ~. z2 c+ S! {, R3 g called by procedure DO-PLOTS
/ D4 p% `3 i! m: j h3 S( U. j called by procedure SETUP
, Q: A5 O% f* L8 F' t called by 按钮 'setup'
* Q) J- e" s7 a6 E求大神解答啊 |