我编的程序如下turtles-own [energy]' T- [$ E# p" `2 ?/ X$ y8 |
to setup" x( q- h% w# x Q: B' a6 M
clear-all* R7 }& I5 X* |+ c# ~) m
setup-patches
/ h- C/ |! k: p create-turtles 1008 O1 I* X6 K8 k0 x
do-plots# ]+ h9 f" D' a
ask turtles [ setxy random-xcor random-ycor ]! p% N) m) E. j. H
end
h; [ f! M: z/ P0 D7 |to go
# \$ n" w: W6 P* r0 L( m move-turtles, m' a$ C" C- d$ Y ?! u
eat-grass+ f8 C: }0 L0 x3 F {/ v& [
reproduce* {8 s8 ^" k' M+ @& o6 r0 g
check-death
" _3 v# b6 a$ b1 \' Y( W5 T2 z1 y, c regrow-grass
3 t( l$ _& r# A1 v2 W6 p5 ?1 ~ do-plots
" P) ]" C# ]! h9 z$ T7 Hend4 L: c! g* ~4 }. B) e
to move-turtles9 w' q. j9 V- w% { o+ F" ?" } Z1 U
ask turtles [5 O& ^- M/ ~5 n
right random 360
$ `7 ~3 i" f: z& M forward 1
9 j* C$ H* c0 b+ i" [- Z set energy energy - 10 f3 \. N/ Q" @# b! v2 ?
]! @. p2 H/ b8 |% W# [# {6 k
end
7 _$ v0 S) A1 ^( ^+ L; T; cto setup-patches; L/ y# T9 l4 i/ `% ?6 L
ask patches [ set pcolor green ]3 ?$ V1 ]! w8 i
end
$ h9 @/ o( o( F1 j( s* `+ |to setup-turtles# J5 B' ~: y; _# X5 [' w9 _* c
create-turtles 100, y# y2 n# |6 p, j% H" U& j
ask turtles [ setxy random-xcor random-ycor ]
# F8 t1 S+ M; h4 d1 ~end# j7 ]* z6 H) t& j# D. w# q
to eat-grass
/ A5 K, V& X( ~3 T* E' C3 C ask turtles [
5 D1 A7 S) Z* I" n y: |3 Q7 R if pcolor = green [ z+ W. a, ~) W L& c# a
set pcolor black4 P( Z. ^$ R3 K5 y. Y9 p$ |4 `
set energy (energy + 10)
( j) Z, n G/ n/ R- U ]8 ^. G7 F2 s3 I$ j2 u# f" D3 l5 g
ifelse show-energy?3 c% B. E: ^0 e$ o9 J) Y8 N
[ set label energy ]3 U5 O4 b$ b& g/ ]# a8 V
[ set label "" ]
2 u' O# `% Z- Q9 [- C ]3 V* @) p8 f: J% l" ~
end
9 c5 B, @, {! dto reproduce
O3 I) P3 h' ~ ask turtles [
' {- R5 Y! J$ K1 S: ~2 ` if energy > 50 [0 H6 y/ T' H8 S2 b
set energy energy - 50
4 R7 \& ]( d) m7 h% o7 m7 m5 Y hatch 1 [ set energy 50 ]
0 d0 }# [0 E& d ]
# [# {6 z7 Q9 h9 p" x/ V) ] ], A6 l% N: N7 j) W- ?$ d
end- w; h# _) ?# E
to check-death( p& B8 d! t1 R( z. N8 F$ Z) N
ask turtles [
% `0 s( L/ R4 V4 }- Q" B. \ if energy <= 0 [ die ]
0 e8 p: @/ q) g ]( }2 t* M/ ?+ t) W; {
end
8 k& B5 ?- D' D( ^) X! @to regrow-grass
. B. @+ r% \0 I9 o* C# a ask patches [! w0 d* ~3 R b0 H
if random 100 < 3 [ set pcolor green ]7 o: r/ f% l3 _& l. t( B
]
4 V0 {6 u H/ ~end% V0 ~4 V4 L4 a! o7 \
to do-plots7 c$ }. e. t% }3 ]+ V/ ^" T
set-current-plot "Totals"1 P% C/ E6 y6 a$ m. l
set-current-plot-pen "turtles") F4 I5 Y& g+ C5 g: C! J
plot count turtles
3 S8 C F+ w6 @7 X/ O set-current-plot-pen "grass"
+ U5 R9 v6 `6 D1 W; C& @4 J plot count patches with [pcolor = green]
, U- r$ ^( s% m5 [end
' W0 a8 {$ X) N& I6 |# l# ~9 L8 P可是运行时提示no such plot: "Totals"
* P) \7 o4 E4 u5 herror while observer running SET-CURRENT-PLOT2 r, W; k9 p( w1 W2 j) M" N
called by procedure DO-PLOTS
4 G& f0 N/ d9 n j called by procedure SETUP
; i, J, E% F5 U/ c& q/ r called by 按钮 'setup'
' `* e* ]+ C! J求大神解答啊 |