我编的程序如下turtles-own [energy]
* r+ u& }( u+ u/ O4 m$ g3 rto setup
3 t7 U. } m8 H& \ ^ clear-all+ W% r# ]# I( l8 P5 U* r
setup-patches; A# ~; B- n5 T( d6 Z6 n6 C
create-turtles 100
1 p4 T; Q+ C- W2 h do-plots
[! N0 \7 ~7 p9 u7 X ask turtles [ setxy random-xcor random-ycor ]' r% B7 y9 l1 r$ M j8 W
end
) s, T2 {6 J6 U/ ~0 g1 T, g0 g( Hto go
. J8 n: H! w; `" g3 \( s move-turtles2 f6 \. V/ O, m5 m2 M$ G
eat-grass7 s2 j* x. [/ p# `$ G+ W' q
reproduce" ]: R8 [( M T, k/ p
check-death6 t( M0 N0 v0 {0 M
regrow-grass
, h# T9 d9 R3 j2 ] t- h3 t do-plots
3 O6 A+ W. C. M9 X8 dend
, |: e. q7 t( s! O2 U* R2 wto move-turtles
% Z( B$ [+ l# A! g9 F* F ask turtles [
+ W* e* \! n# |& ^5 L# D/ d( \ right random 360
6 o0 _/ Y8 l4 R8 \* T forward 1! I) G4 ] w/ a) X9 b
set energy energy - 12 L0 {5 i8 l# T1 Y& y
]
& @, ?0 o8 q% c3 Q' ^( send- o5 \' b0 ] o2 x1 u3 }
to setup-patches
' _' M9 j# ~1 @ ask patches [ set pcolor green ]
, f/ i* @4 u1 Nend
& _! z2 @( D" I5 z+ l$ T* N! K0 tto setup-turtles
% J2 R/ A# Y8 ]6 G0 v) C create-turtles 100+ s3 k% C1 o5 z8 D- `9 L
ask turtles [ setxy random-xcor random-ycor ]
0 v* }' C- f8 j9 A8 i/ f( qend* W4 t' D6 L5 g0 i6 t4 b& L
to eat-grass
# O% L' ~+ k9 y3 S7 M ask turtles [
* D* S: b& p- w5 i' d if pcolor = green [- r6 H+ G& a8 x' @' R; O
set pcolor black, Y5 e* l; d0 v" ?
set energy (energy + 10)8 Y2 W' T! o4 B5 M
]8 @. h) z; r5 `2 T* f2 u8 G
ifelse show-energy?: s) B( @* r0 I, G( u
[ set label energy ]
7 n5 L: ?: _, D/ h0 q" h0 w0 j [ set label "" ]
3 u: r2 V/ P- A8 J) K ]
5 u1 c9 ~& X+ P3 a7 kend: ~% Q r# C+ Y9 v
to reproduce7 g; f% d2 V1 I# \+ |: [
ask turtles [; v) L: R' F1 M i7 w
if energy > 50 [
$ _: z% l) b7 l. C/ c8 \& } set energy energy - 50
3 ]8 ^! y L/ B6 z3 k; { hatch 1 [ set energy 50 ]5 ]- w/ z. O( ~! M( @" m) b
]
) |, r, j+ b+ X5 \- n: f ]
' O9 e: U& J, x: D5 L! E2 J- t( S2 uend" { X2 A; G% `3 q
to check-death1 b( f, G$ ?7 E
ask turtles [
, g6 I" x4 V0 \4 p; p- @% \ if energy <= 0 [ die ]
6 m( l: E/ n* t& w6 `& Z ]
, \9 d x' \$ b3 v: Dend& u4 ~+ \. ]% K
to regrow-grass
6 J4 l1 |0 W6 k7 z0 B$ L" q; X ask patches [$ m0 E6 V" T. l+ @) U
if random 100 < 3 [ set pcolor green ]
J% S+ T* {! g( L! u ]) c) P! b9 e+ {
end+ N' ~0 b9 b4 W) P1 [. ?
to do-plots$ e4 N- j0 m4 L& R$ l
set-current-plot "Totals"
) z# v- Q2 ?& x" b% `! A set-current-plot-pen "turtles"
4 R2 m( }7 H3 }; ~* e k plot count turtles, a5 @/ n! L+ m2 t. G% i
set-current-plot-pen "grass"
) f7 o* E) a$ p" o; y# o plot count patches with [pcolor = green]
' T) c; `/ o+ ?, T7 c/ [ [8 ^8 F9 [5 jend
8 E P6 a1 H5 @/ ~6 m可是运行时提示no such plot: "Totals"9 K( f- H9 C: f2 s& T a
error while observer running SET-CURRENT-PLOT
6 T" @- V$ f8 C0 N) \* L" k2 B called by procedure DO-PLOTS
3 o4 o4 l! D, L4 R4 K called by procedure SETUP
4 e, \) s$ Q9 T8 x# C called by 按钮 'setup'
" m C6 e4 C/ V! x6 L# X求大神解答啊 |