我编的程序如下turtles-own [energy]0 L2 a! j) C4 m- Q6 ^4 J/ g- s
to setup
$ Z3 T* r& ?: v8 Q clear-all
" N* C: c5 _0 X3 O! u( w setup-patches0 R. t) h/ k& w! h$ L7 Z9 q% O
create-turtles 100
) Q8 k( l! ~; t( p( e; ~/ h do-plots: ]5 h1 U f2 X8 k; Z! X+ ]
ask turtles [ setxy random-xcor random-ycor ]
3 |3 I5 J' A- \, rend
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move-turtles& o8 q( L1 P* W/ u+ I
eat-grass
% C) w: r: A8 F# m$ ? reproduce
2 g% K4 B4 _, Y" c2 b4 @3 J check-death( y0 ~; d$ U& A2 i) s
regrow-grass
' f& m3 L# p1 ?3 T: }0 } do-plots8 t: o& [, u; `. N) U" k/ e
end
7 o" v- N# }$ s/ J+ Z( t0 E2 fto move-turtles2 |. t( K. K1 C; d' l
ask turtles [
8 k/ b( A( L* Y right random 360% Y+ x/ X0 j. S" l1 @/ U
forward 1( s) i2 g! l9 ~7 F) Q x' C4 |
set energy energy - 17 x1 Z, r5 J* n* E
] V$ W& ~; W ]2 |. G$ v9 C6 L
end
3 S8 G9 I" [0 Y8 R+ `to setup-patches& X+ y$ b: v; J& a
ask patches [ set pcolor green ]# r5 {: K# @: K
end2 Z8 P+ E& E. X. Q
to setup-turtles, S) [6 c% T! `% t' s$ V
create-turtles 1006 X- K2 p* H2 a6 S
ask turtles [ setxy random-xcor random-ycor ]: c3 Y& R9 ~ U# _& R' X5 M% }
end. I. i5 L+ P7 t; G' ~3 @2 c% A& m
to eat-grass
. `, G, `0 m2 _: e3 U ask turtles [
$ c* ], s4 K0 u7 x V if pcolor = green [
0 W4 b e- \5 I set pcolor black
& O( A1 o& @4 w& v3 L set energy (energy + 10)
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ifelse show-energy? |" t! f; W+ F/ `
[ set label energy ] `( r2 n/ E) b
[ set label "" ]
1 L, h# v6 f$ d5 X: X ]
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to reproduce- K* [' h, `+ L) I1 F+ ^* G
ask turtles [
& r8 Z, R/ W! X% x' A8 M, N# r if energy > 50 [
* J6 e+ \2 |, O. m0 _6 q* | set energy energy - 50: \. L* I5 G& b6 \, H- r
hatch 1 [ set energy 50 ]3 {1 n3 m4 G: W1 E
]) B7 J# L- |- e" ?% d7 M) ]
]$ D! W" k( b5 k. X! w
end
) A' q/ Z8 @% \$ ~. M8 r: Mto check-death& o# v, T1 T% R0 T8 f
ask turtles [/ Z7 v) _: \2 n1 V8 ]5 h7 V8 ^1 [. G
if energy <= 0 [ die ]: t4 ?' P) K+ S, K# R; ?/ r! P+ e
]
) o1 }6 ^! |) B8 _( X: Q+ Aend( p: Z2 s+ b: S/ g9 V
to regrow-grass
6 |' p# G7 @# H8 ]+ J; Z+ w/ J ask patches [) c2 `1 _9 X' @
if random 100 < 3 [ set pcolor green ]& k8 m- F. ] g1 G- e9 J
]/ O8 n5 ?3 E5 W
end
* W7 y+ Y+ ^2 A1 K$ zto do-plots* X& y1 Q/ W$ T( ]
set-current-plot "Totals") T# g, l( f; c- c; n! P7 j3 t. ~
set-current-plot-pen "turtles"% o2 n) c* I+ E: D( U
plot count turtles
/ [8 ^/ F% \9 r% i( t; e set-current-plot-pen "grass"
# e. G6 ?0 v9 D3 E plot count patches with [pcolor = green]
- Z& Y9 X" w5 h" }end, @& l6 _ q4 u. P$ B0 x0 [
可是运行时提示no such plot: "Totals"4 {5 K3 I' H" F3 u9 Z2 a$ v$ M) C4 ?2 C
error while observer running SET-CURRENT-PLOT. r4 y' F) C) r0 R# C4 t
called by procedure DO-PLOTS
* H. K! R8 s) S2 y called by procedure SETUP
" H7 N7 n/ c% m" o% [( I) }0 | called by 按钮 'setup'
$ ]" N* E- v L0 w h: n求大神解答啊 |