我编的程序如下turtles-own [energy]
- i* i L- r, v7 U! ^to setup9 W& q% G1 u: A0 H" y: C; M
clear-all# D& V% ^7 @) S$ M3 ~2 i
setup-patches
# u1 K% g2 x- O$ W& B create-turtles 1004 | H9 {2 |% Q2 m' _0 b5 H$ S4 P
do-plots
% P6 l) J' H; _' @+ f+ V+ _7 q ask turtles [ setxy random-xcor random-ycor ]
. x+ V6 T, T3 X$ wend
9 {# M$ B, D/ T1 Uto go) L$ p- w- p$ u6 G% F9 u
move-turtles
0 |/ {# v' Q: u g eat-grass
' E( m6 I" X- ]5 E reproduce& V, v: m0 N$ q- b6 f: {
check-death5 t( @5 C- g, M j( N
regrow-grass
' a) T! O S3 ]/ t do-plots3 K) z1 u0 J f+ L7 H
end
2 @( Y7 M. [4 {* M& Ito move-turtles
4 F; i4 N* `5 \, e9 r0 O ask turtles [
; X, [3 R8 e2 I1 E right random 360
" g% X# }8 n5 q" I$ E forward 1
) z3 p; w# g: i5 N3 c* T7 O set energy energy - 16 O# v- A, w* i* }- @" t. D) o
]
! ?5 G s7 h: j, aend0 l0 _# s2 x$ T
to setup-patches
* N' o4 j- W8 G5 b0 f8 I ask patches [ set pcolor green ]* i3 F6 Z3 ?0 ^3 z- d7 c; S
end
/ l" x: b3 u8 I, Qto setup-turtles
; n$ z" j0 k4 s create-turtles 100
0 Y/ t& d" ^& d# y9 z0 Q, F ask turtles [ setxy random-xcor random-ycor ]
~* I7 U# {; J2 L3 Bend5 C& N$ ]9 x& f5 o. L
to eat-grass5 ~! _- Y9 u5 h# a
ask turtles [
; ?3 @/ Y% e$ u! T- A if pcolor = green [& L! R3 s, M5 ]$ g) |1 f
set pcolor black
6 r/ D' e4 [ g1 \5 v" ? set energy (energy + 10)- z6 k" ]8 q5 s5 @9 J" y. E* X S
]0 }7 G: u1 ]- e+ f6 p
ifelse show-energy?) o& x! \6 l# W& d$ n2 `! q
[ set label energy ]5 A" z& R) t( v. W4 z& H7 z
[ set label "" ]
+ W6 m/ c' q( \9 [9 o0 x+ q ]
& N. e+ x# `& A: {$ o' xend# K3 |* i8 a! O& j. U0 K
to reproduce
) H+ b7 x: Y: {# g) _4 W( h ask turtles [; ^" |+ i( Y+ V- B* h& `) T
if energy > 50 [8 \; e0 T; W/ |9 f0 c
set energy energy - 50' ^) W5 K% U5 j; b& v+ w
hatch 1 [ set energy 50 ]
: g: D$ r7 }& t7 h ]
. G3 e1 x% e: Q R1 X) W/ w9 s ]
" m' E3 `6 p+ e5 j) T% g) r0 c( Wend! f3 h0 o+ C( G H* f
to check-death5 _9 t, X5 V# D z8 i1 ]/ F: X& O
ask turtles [
) o& z. W# J4 Q! h" C! `: w, B; G# z if energy <= 0 [ die ]
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end
9 L( |3 V1 r8 K7 X& |7 W$ G3 ~to regrow-grass" Z4 t! _: @' E3 F/ D2 {
ask patches [
/ D6 g& h. u6 K6 i& ^2 F# q& K if random 100 < 3 [ set pcolor green ]' N. b' w5 L# w+ ]
]
4 T6 R. j& S5 J! b6 S, R( zend
, O$ K. U8 S# rto do-plots
+ o0 r# R; Z. z1 V6 e set-current-plot "Totals"- r& f2 h1 x" L9 j& l0 N& V
set-current-plot-pen "turtles"' v( N! ~6 Q" |
plot count turtles
5 U' I ?2 d, l7 a! C) x7 z" C set-current-plot-pen "grass"
5 a9 c& q; [" [6 r$ F plot count patches with [pcolor = green]! G4 }8 j" }7 C1 Z& t! P
end
: v2 v; O- B0 z8 e y( @9 n" }可是运行时提示no such plot: "Totals"9 ?; c" h0 b0 h# }6 p$ Y
error while observer running SET-CURRENT-PLOT
$ c- F9 x( X' |! W called by procedure DO-PLOTS- J. W2 N5 C: |% X# p0 a. p0 `- l
called by procedure SETUP
0 b4 h+ c+ E# M2 {# ^7 {6 `' ] called by 按钮 'setup'( J& B4 F' u6 E7 p7 I$ [
求大神解答啊 |