我编的程序如下turtles-own [energy]
2 N0 f k: [* {7 N# q$ w: ^to setup' F- F5 l, n: t# p2 R" l* r
clear-all
h. O- p' T( L- u; j setup-patches* m: _+ C, h" b4 b1 r7 T6 D4 C% {8 X
create-turtles 1004 ?2 Y, L9 B& c! h; s) ?% t
do-plots" b3 {' U# U) Q2 m: j
ask turtles [ setxy random-xcor random-ycor ]
# s* Y0 z( X1 z qend, J! I; j8 r& Y$ `0 A; |. v
to go
2 q( K: Y! Z. Y( V/ u move-turtles
: b7 b: G5 g% X3 I$ Z eat-grass
4 l6 i2 {2 S# M. J; \ reproduce" t; G q9 y1 b4 c1 D) \
check-death
' Z* z3 ?' X. ]) g. y# r regrow-grass
# J" M' ^) x' V do-plots
: X- f9 W. m% R1 fend
! v& j/ M5 P" c+ J% v: N& u% y* Xto move-turtles
, R# _) _% i. K9 Y* M( j, A, ^ ask turtles [* A# @ K( s, E. K7 g
right random 360
1 j( K) F2 }9 I8 q forward 1
$ X1 J4 m: n( F9 {2 L" Z set energy energy - 1
$ J+ w( q' m9 X4 e# p$ t ]: ^* Q3 H+ e3 \8 ^& u
end" ^/ T5 C2 `3 |) z) U
to setup-patches
1 d6 a* o8 W: K9 ~ ask patches [ set pcolor green ]$ P# P/ L' ^- k
end
! _7 M( P7 Y/ `to setup-turtles
y2 }/ V: L2 `* e7 H create-turtles 100
% R$ t3 O7 ? e; B1 X ask turtles [ setxy random-xcor random-ycor ]
+ M6 I+ X( U0 ?+ V; Eend
8 Z2 m, ^0 E0 yto eat-grass8 Z# S, w6 }4 a* I: p7 `' q
ask turtles [
2 D+ W' w3 [- e D if pcolor = green [- g% G, p3 I+ v& H1 e) N
set pcolor black) z1 _$ S+ C1 m1 Y9 Y* j
set energy (energy + 10)' g4 o# u2 A/ E4 T
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ifelse show-energy?6 i9 j) @2 @$ J
[ set label energy ]3 q+ [ ~1 d" C2 P3 J8 p0 w W3 ^
[ set label "" ]
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& ^4 y. a& _6 |end
. E. u. P& \4 t& P( zto reproduce( z3 d/ J5 I& ~; B
ask turtles [
3 E$ D6 X K& v7 H4 o+ U9 r! V- n if energy > 50 [
: n& Q8 R4 a* `, T) u set energy energy - 50( m# W) Q I- ~9 u
hatch 1 [ set energy 50 ]
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]1 E1 m5 [2 u$ {2 O/ N3 W* u [
end! P/ n1 Q0 N8 w
to check-death# O% a$ {: C) q: W: }4 o
ask turtles [
; ?5 C! \0 `( ~ if energy <= 0 [ die ]6 Q9 h0 F6 |0 F+ {
]
# P, Q( L( B1 xend
: _5 v R* s. x& z& }. |to regrow-grass, G1 G" |, f4 Q c9 d' w' ]
ask patches [3 j0 j' @% {3 N# g8 H) F, @6 M+ A
if random 100 < 3 [ set pcolor green ]
6 R" y5 ^! b8 Y6 f6 c& t ]
" {# S- q5 ^' g1 [6 H) l, N. dend
& a. r9 W+ P& I# P' B% nto do-plots
7 k0 Z, r& `& h& g7 U$ j set-current-plot "Totals"
- J3 C7 n# I2 c) z+ ^ set-current-plot-pen "turtles"
# {9 f9 c9 P# y5 [2 J( L6 ] plot count turtles
2 Q& |3 |$ j* ^% _6 l) L9 X set-current-plot-pen "grass"
; X' A5 z8 \; r- ]1 w plot count patches with [pcolor = green]
& L3 d# u# n: P) d- H: ^2 X6 Rend! X/ G5 |6 U; P. d; H/ |5 l0 `
可是运行时提示no such plot: "Totals"
" U1 x& J: s( C; i5 terror while observer running SET-CURRENT-PLOT4 {+ z) V+ r# ] v9 q" |- Z
called by procedure DO-PLOTS; x: V. N3 I; a
called by procedure SETUP
! w2 z5 ^) `' r called by 按钮 'setup'% U* `5 C! E- ?
求大神解答啊 |