我编的程序如下turtles-own [energy]
% u- g& K6 O' r0 a7 ]to setup
% O# L/ b0 f" J5 x+ `7 v: e clear-all
, {1 _7 X( A& I, h4 t3 l setup-patches
/ V b- j/ m8 ~; |( P, l create-turtles 100/ w% ^0 u# B9 g) A
do-plots
- Z9 t# T/ I5 C" Z9 o) d- ` ask turtles [ setxy random-xcor random-ycor ]+ Z r( p& e3 s' K9 h+ t' V% M
end# P3 I' H* { V/ T7 z3 p' T* J: ~
to go ^& T6 i4 a1 C9 {8 K1 Z
move-turtles$ x, S! F/ R5 a2 H# I7 m5 |, R+ G* L
eat-grass
9 ^- m E) Q# a6 |2 H1 f- D; g reproduce
; |* ^7 ^! t, F$ _0 W9 A check-death* Q2 i, P9 h+ X9 o7 O
regrow-grass G6 U/ W7 p. C, ` I
do-plots
0 @. F. Z8 R! C$ aend
. J& a7 q/ C' e+ N- vto move-turtles2 e$ Y* e7 B" R
ask turtles [
- M7 y: V- g4 w' Z u right random 360* b/ O+ o v# h( ~: ^
forward 1! |+ t, _' ^4 X9 D; x0 c" r0 p
set energy energy - 1- J" }, t' Z- Y
]
$ g- \3 V7 Q$ _2 F- F& Y Kend( U* _' z6 g9 z3 e
to setup-patches
9 |, X+ }) \# a, k6 m. d3 ^ ask patches [ set pcolor green ]
, e: {8 s- T" N, @. zend
, @- ?7 q+ h( u! D1 c. uto setup-turtles* h7 n' s: Y! W0 @: @! n
create-turtles 1005 P _- S. }6 i2 \5 R% W9 R: ]6 r
ask turtles [ setxy random-xcor random-ycor ]+ M" ?* k6 I- f0 [
end6 X4 y1 P# `7 u, N7 |7 A
to eat-grass
+ @2 z9 F( z" G e ask turtles [& ^; D/ h! Z9 A0 V6 B) T8 z
if pcolor = green [ S9 _$ s( K# [, Y) C
set pcolor black$ m5 m( I: k1 ^$ A$ C
set energy (energy + 10)& N8 M6 u4 I% h" u% B1 J
]1 X, G( C+ ?/ {+ A
ifelse show-energy?6 s* R' i' m: k" O( z2 M1 H6 ~
[ set label energy ]6 s V+ z, z- c; j1 C
[ set label "" ]
4 h' F2 T) c" Q4 p3 H' J. ~! o ]
: |% c# Q6 g9 b, l5 ^7 d% ?end3 S6 s/ d7 R9 I6 F: X& v$ j1 ?
to reproduce! [& v, _# Y" s
ask turtles [
( k6 X7 s7 J f4 y- b* i% K- S if energy > 50 [
1 M r! u7 h& a3 ^ l set energy energy - 50
5 }0 k6 l5 n, p7 w* }( k hatch 1 [ set energy 50 ]
& b9 _2 _ z, @/ W3 f ]
5 t1 H; S6 @& q( |3 F1 y ]! Z( R* i; l4 Y$ a7 Q* s# o6 b2 L
end x: t+ [- Z( ^) c) _3 l
to check-death
$ A" ^0 L1 T/ o5 b ask turtles [. s& V i6 R) Y: a
if energy <= 0 [ die ]$ F7 e, u0 o5 N% r/ _6 l) B
]0 I S- w) _ F
end
; ~; w" p [0 S" Rto regrow-grass. \ D: j. i, l9 a8 D O0 V
ask patches [
6 H0 [1 s. f1 p0 w8 E, j* _ if random 100 < 3 [ set pcolor green ]* J) w; M- p* ~0 I) U$ N
]
9 i( e d, E, [. Q7 R7 ~& D! Eend- L. V+ S: {% t& u3 r9 u, m2 @
to do-plots+ S/ d8 y, \) x( @# L {
set-current-plot "Totals"
7 h& V% j+ u8 T; s* `1 e# `; [ set-current-plot-pen "turtles"/ k+ K3 O" D( _' j+ D
plot count turtles
. p! C& k9 Q: j) @- o set-current-plot-pen "grass"
! @* k" g6 M7 h* ? plot count patches with [pcolor = green]
/ \% ~# L4 I! W+ [- wend
% H0 p& u+ E4 |可是运行时提示no such plot: "Totals"9 Z0 [1 k- }3 d1 s' y6 f7 Q# o
error while observer running SET-CURRENT-PLOT2 P0 ~7 N- B$ z4 [" q; C+ V5 m. _
called by procedure DO-PLOTS/ c: m6 }5 s$ G( t* `
called by procedure SETUP# q e0 m8 o( }& R$ [! X- z
called by 按钮 'setup', b. p0 }& E# j. p% h. X
求大神解答啊 |