我编的程序如下turtles-own [energy]- s0 t1 z H) N* \" i* [$ t4 D
to setup
- g9 T" I+ s' h clear-all: \, d! x. j' k' h+ g' c% F; X
setup-patches
# x$ f" @3 s2 R3 E0 G& n create-turtles 100
6 R9 R- o: g8 G* p! C' z2 F do-plots! W5 [: f4 o" c3 P; c" f
ask turtles [ setxy random-xcor random-ycor ]1 Z$ a' z* s( {8 Z+ N
end5 L( j) A# P( l9 [* u
to go
: P2 j: V: g* s: W9 u7 I1 w# Z3 L' F move-turtles
% Q. _! h" H! g: S eat-grass8 h. r# Y7 w& p& s/ L
reproduce1 Q3 r/ u2 h- M' P7 l
check-death
4 l7 k! S& t! _, T. X regrow-grass4 y/ M |7 A" J6 b* ]! i
do-plots
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to move-turtles- D1 B; C5 n) X
ask turtles [
1 \0 ~0 i0 ]& d! G+ e( B- i3 e" B right random 360
& ?! O. H' U# B$ ~( O2 T# E2 y forward 1
) p& S9 K; O) c! e set energy energy - 1( h% P& w4 G' o% l* Z! v
]
: Z1 K$ ~& l( p) c+ n7 _2 J7 nend
4 |2 {6 K3 ^4 }- P: t, S& K1 ito setup-patches
, m) G9 H* F" }7 r3 e R ask patches [ set pcolor green ]: M# Z- ?. O5 [# P0 [( `
end7 \; w+ m5 P- ^' }1 r; B
to setup-turtles! t$ ~6 c- W E# x- K* t8 W$ y: Z
create-turtles 1001 I# T. Q/ p9 T- D) f; Y S
ask turtles [ setxy random-xcor random-ycor ]) p. u. w I% F& b+ }4 n
end0 _) S0 ] B) M. ^. N5 N
to eat-grass
5 j4 W1 l! d) H; @5 d7 J ask turtles [( ^$ |2 E! S( v. e& t. }
if pcolor = green [
6 x( S% J, a3 q# x( F' ~ set pcolor black
5 L. b% }7 \- L, E* W: d7 z: Z set energy (energy + 10)6 u* ]& m3 Q% X6 i7 z% C: y
]9 N8 R9 K2 j. `0 N7 g8 Z
ifelse show-energy?; j" Q0 x6 S: _( k# O- \
[ set label energy ]% k. h: |- p, I
[ set label "" ]; Y0 b7 g5 q7 o5 }
]
0 }- H8 ], `7 z I8 u/ n; p6 K6 |( Send" t! x% v, i9 J. ~5 s! i
to reproduce& y" [/ X; |& Y/ b5 z$ a6 l
ask turtles [
5 ^1 b: e$ V J* ?- o if energy > 50 [/ v; P F3 [2 l: d, |" H& t
set energy energy - 50
, y6 f* e+ z$ T" n hatch 1 [ set energy 50 ]
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. l1 W K( N, t5 E ]
/ }8 P9 ~# V6 y# f2 @ ~( g; |end
. K: V l, M2 ~7 i1 r! I8 `to check-death
5 h! P6 l( A/ ?- t7 ?$ P ask turtles [6 Y% V1 W4 q6 L l
if energy <= 0 [ die ]
& m2 f+ a8 @# v" T# c ]
& q) o7 y% ~* _8 H: `0 e, Y5 Iend
3 D. U" S. T+ D* b; H3 Q2 rto regrow-grass. Y: ?/ n. v% ?5 A% ~4 X4 x
ask patches [! l" x* n+ q2 l) B5 ^
if random 100 < 3 [ set pcolor green ]* w; G* o8 [ X% b
]
4 {( T3 g( `% E. |9 l! r: F8 Gend/ o. \4 Y) [5 e4 N( k
to do-plots
2 V# b9 P% B8 x, S/ w0 | set-current-plot "Totals" K% W$ s; _$ o" \
set-current-plot-pen "turtles"4 A" ?; b( k+ n0 n
plot count turtles Q8 J9 Z5 ~! m& u4 o8 `
set-current-plot-pen "grass"
+ a: j+ @5 S( l' U; H2 A/ g plot count patches with [pcolor = green]
- _4 A% _+ X3 F, R) s# Yend
* U. @* }% U# o4 p9 U$ M. H- o可是运行时提示no such plot: "Totals"; M7 y3 V, _3 x! q- t. p& t
error while observer running SET-CURRENT-PLOT
+ n. }# E( `3 h- ? called by procedure DO-PLOTS
: t& d, J3 A6 P7 ~% \* g called by procedure SETUP" n0 W9 ?8 P5 E
called by 按钮 'setup'
3 T0 t# t; F* O& d2 r求大神解答啊 |