我编的程序如下turtles-own [energy]* Y% ~: z4 ?9 o- I" d5 W0 ~
to setup2 M% g$ R1 |' J1 C: U
clear-all
. k& B6 i2 I" `5 n2 i6 s setup-patches$ Q# W. g; u2 Y4 q# {/ T6 C/ U
create-turtles 100: t) P) V. H) s w) S- y' n
do-plots: X; h& r( c7 Z
ask turtles [ setxy random-xcor random-ycor ]
' P# U8 }3 u3 V, n( |end
6 B" |1 C5 ?. R8 I0 ]$ e+ c- cto go
8 }! B4 D' F5 X# o8 s move-turtles4 e8 X* ?- V7 |: O/ l" \/ S& ]
eat-grass' k6 V, I% f) ^4 X* c5 |
reproduce
3 Y7 `9 t: ]0 U check-death
# ?! D* D6 M6 x8 b2 v8 W regrow-grass
3 a, p- o- I7 w! Z5 j4 B do-plots) d7 B( O8 D" E2 N0 h' ]
end. @5 \" W8 J: _8 e$ \6 y8 R
to move-turtles0 h* x$ j* |1 h- D: O6 w4 K
ask turtles [
n N' d1 ?" x% p0 R/ b right random 360
( e' {+ z0 @5 M/ O+ J$ c9 O forward 1
" l. Y' c' r( Z set energy energy - 1
; X" u) V9 `; L% Z2 z6 P6 A6 D ]
7 S& k# Y8 s$ x( Jend
% R) Z% U3 ] Oto setup-patches
; j, L9 k9 o; G) ^! {2 v ask patches [ set pcolor green ] a! F1 h; U P. c
end- U% }2 L5 f$ k1 L1 h- P
to setup-turtles
' H3 S0 W$ P/ W create-turtles 100& b3 ]+ y* v; D$ u7 t
ask turtles [ setxy random-xcor random-ycor ]1 ?& z+ n; m" t% r- S" \$ }# d* e
end
& a. ?! d& @ T3 _! I# q9 v* \2 Tto eat-grass
* M3 [1 G7 k* @" G i ask turtles [2 |$ O( H6 w B/ r8 W
if pcolor = green [* C( n0 ?+ o( Q6 |2 U
set pcolor black
. ~) s3 [& S" t# d5 A3 | set energy (energy + 10)6 s7 |9 ?2 }0 i( m. W$ L8 J6 b
]
* \9 r* O3 Y2 i ifelse show-energy?
& ~3 }* h( H7 z4 l! C0 m! C, y [ set label energy ]5 ~+ z% ]: G& D( O
[ set label "" ]& s1 z8 }6 j. U9 Z' M& {# G
], Y8 E1 W4 g& B0 q& Y+ C( Q
end
8 C% r' I$ ]8 s) uto reproduce
0 D d: s5 s$ d ask turtles [1 _; L N, ]6 B! u6 R
if energy > 50 [
0 u( X1 U5 B w5 n' F; T# U set energy energy - 50
8 |( f3 _4 e1 t' f" s, D$ n3 W hatch 1 [ set energy 50 ]5 V3 x0 Q7 s' b3 B0 H7 V& V8 `: D
]% `9 f, l0 v0 f& ^& o2 ?) W+ H
]
* I3 e% g' O9 a) Uend+ p' n: u/ G4 e) I( y% M/ m
to check-death; U b) F' z w x( m* t
ask turtles [
3 t( I2 ?6 R$ R if energy <= 0 [ die ]/ [. D6 n* x( S! E: X
]- T! P! `4 l) _, l
end7 r! [8 M% ]1 G9 Z
to regrow-grass0 a# O4 n# Z5 w) D' w
ask patches [
% @3 w4 g) R$ o( r9 D" N if random 100 < 3 [ set pcolor green ]1 j/ y+ l9 W$ h. E5 c
]
* v; X' _6 y5 L' Qend
/ s" ?. {9 b% M( g- gto do-plots' _" A" d2 c! C
set-current-plot "Totals"
" k$ r2 y0 i. E set-current-plot-pen "turtles"7 W. L( A" Q$ c& `
plot count turtles( Y: A/ v% ~, [
set-current-plot-pen "grass"* R2 d4 Y4 d. n# {( u ?
plot count patches with [pcolor = green]8 x8 b& b- v$ `8 G5 l5 C5 @1 `
end
1 y9 B3 {1 \# |7 E& [0 o: Q可是运行时提示no such plot: "Totals"# r( Y7 S% g( F7 f* d5 u3 z/ ]
error while observer running SET-CURRENT-PLOT% ~1 g9 E+ t$ e. ~
called by procedure DO-PLOTS
- U* k7 o6 L- p called by procedure SETUP8 n* i- u2 e) f% M. T0 u$ m7 R( ?
called by 按钮 'setup'/ [1 {% D* w' N6 V2 a
求大神解答啊 |