我编的程序如下turtles-own [energy]
5 {% A) _8 {# {9 x$ Zto setup
6 I, v: g; \ X+ N clear-all
8 z# ]/ @1 Z- b* R, _; `/ d setup-patches* _' A" h- O" o0 ]
create-turtles 100
d) @- J: b, \ do-plots- j: u- X( _9 `/ @% N/ d/ t) D
ask turtles [ setxy random-xcor random-ycor ]2 ~& F8 X- p. h: @
end
% Q' g, D" ?: Y) f9 {to go
8 S7 ]9 T6 H! A! ] move-turtles
: f& [$ L9 y2 J. K, f4 [5 X eat-grass
. h g6 K; b2 U) N z- M reproduce
: X: V6 Q O8 b& G: c$ v check-death
' W! z" G! z8 _, X" n# x( H: H1 u regrow-grass
# V. Y4 d1 L7 {! K5 y) M& W do-plots
2 ?1 M2 [5 \7 F+ vend, y' I+ N. M' C
to move-turtles
. E" ~: K* ~) T0 E6 w ask turtles [" }' X2 v; w9 r# N
right random 360
2 r- |. p7 D& W2 W forward 1, Z+ Q; k& a0 w2 h
set energy energy - 1
6 T: t r6 p% [/ I ]2 {& ^% R9 b! ^7 i
end
+ u% G+ Z3 y2 Uto setup-patches0 Y6 a" I) x+ g3 j/ S
ask patches [ set pcolor green ]" T$ f! Q/ x" W% d4 ^& y1 }; F
end; a1 r& s; L8 }4 q, | b
to setup-turtles- O8 P( T+ i# K. L* W
create-turtles 1003 }; n; ^: F N' s
ask turtles [ setxy random-xcor random-ycor ]
+ |9 ]2 z8 n' V1 send
$ w' G8 j( ^; E* Bto eat-grass
9 {8 N, A0 ?0 f. n$ i) \# k N' `# { ask turtles [
4 f' @$ Y7 J. o: W: U( t if pcolor = green [- h8 l0 D3 F+ i$ Q$ v3 Q/ g
set pcolor black
. r/ Z8 h& ]2 T- L0 T set energy (energy + 10)
, f ^, c: d6 {2 |! E! ~: U/ Q ]$ }. l$ X& |3 E& _, v* ?: Q/ `& P) [1 l
ifelse show-energy?# A! X1 c0 [' N' i7 f
[ set label energy ]) k8 Q9 P$ q7 q. S
[ set label "" ]0 }. D" k+ }+ @! s( P
] `: r! [$ z, u- J
end! s7 `' F) F4 u, c x) K! X. e p
to reproduce
# Y$ u x: X3 g2 E; c ask turtles [3 P7 A( s [( F4 x* y9 u
if energy > 50 [
. y. w* w( V# P' a0 D4 n: v' e set energy energy - 50# f7 o+ X" ]; m1 s/ G7 i
hatch 1 [ set energy 50 ]5 ?) _$ \; A$ c% ]: g# f( K
]
- j0 |& ^( x4 _2 @ ]
1 w, w" h: Y7 ~( j) G5 ~0 z% tend1 i4 H& e3 f- i2 t, p
to check-death
! A" s3 [5 S0 B2 X ask turtles [
/ v! e0 w- J9 B/ [6 _ if energy <= 0 [ die ]
2 f! g4 x: K, [8 }+ n! ]8 } ]
) i. u% T4 @: @, l0 W. Mend
% g$ {1 j: y2 F, E# p, _to regrow-grass
' U5 ^5 J- x: x/ \$ } ask patches [
* }0 f$ M$ E: O! T+ ] if random 100 < 3 [ set pcolor green ]
4 e8 r4 E5 M2 ~3 J ]+ l* Z- @( {+ q$ s6 y+ @9 _! J r7 B
end9 o5 n% K( z+ Y! p: }! b! C2 d
to do-plots! H' f) `# [6 p) [9 e% j
set-current-plot "Totals"
; g' n" k! Z6 e set-current-plot-pen "turtles"8 U3 B; c, G4 O* O: R
plot count turtles
4 U$ o$ R ~( y$ v set-current-plot-pen "grass"+ n$ z) o2 ]" b2 ?7 J' `7 F
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"7 ? c+ a e9 p9 x5 O$ w/ _9 |6 |
error while observer running SET-CURRENT-PLOT$ x! t" y7 p6 Z
called by procedure DO-PLOTS L( y- F$ S+ e6 E" X! V: J2 Q4 X- z" }
called by procedure SETUP
, U5 M8 t+ N5 S! j. R0 R, @7 D called by 按钮 'setup' P& h& U( P- L& C
求大神解答啊 |