我编的程序如下turtles-own [energy]
+ J8 |' d. e( c1 \to setup
# i" M+ V2 U5 t1 u4 @ clear-all( {6 h2 f& I. Y* r4 I m
setup-patches% w0 g% N1 l1 O$ [$ \- k( g
create-turtles 100 u4 E% [/ J9 k
do-plots, U0 T2 ?9 a% V5 w/ X+ p4 `1 k
ask turtles [ setxy random-xcor random-ycor ]2 A1 H2 X5 U! w0 Q. O
end, M% T" M% a0 g/ [
to go E+ t/ T! }5 d" K$ }; u5 W
move-turtles
, N) P0 |+ L' [3 f0 J+ B eat-grass
, x. L4 g8 ^' |7 Z- X. J( Z& M) g reproduce2 t$ {+ h T3 r9 g3 l. k0 @! t1 C1 Z
check-death
5 g" B4 u( m4 f+ [ \' e; \7 Z) f regrow-grass
3 ^8 }' y! m6 U) r# N do-plots {' X7 o3 F& Z# ]5 I
end
: q. _* v$ Z2 O# f3 @to move-turtles$ s7 T9 Z* X2 ?6 B" ~* C6 ]% K
ask turtles [' T9 J, B. c3 M5 I( Y2 |
right random 360
* B2 a: S3 L k4 h/ B forward 1; N5 \) w: X( \4 X$ `' \* z% Y! m
set energy energy - 1
$ ?3 _1 j2 N7 m# o/ m ]' E6 r" g5 Y: X- o4 a" q
end
3 W, }7 V2 E) r2 vto setup-patches
/ U% m5 z- }0 I ask patches [ set pcolor green ]2 l& R* z; |3 L) @1 R+ ^1 z/ N& {) c$ N
end
9 [2 e- j7 m2 m" z( e6 @8 wto setup-turtles" B2 n {3 l0 I+ L2 ?
create-turtles 100% N6 y9 \9 \8 q, }& w' |# X' T8 ^! D
ask turtles [ setxy random-xcor random-ycor ]# K8 A* D: ]( D2 g9 U( s
end
. A9 r, s9 A& `7 O/ i! |, T0 B0 uto eat-grass
8 O( D H y y9 o7 C8 \ ask turtles [
$ r& X- t5 g. X2 R if pcolor = green [
% o: N2 I {: Q- N( b# M set pcolor black
3 E+ R, j: }0 n7 z set energy (energy + 10)
/ M6 T7 O* s7 e ]
) S" x! B" J4 L7 D ifelse show-energy?
" G4 p8 i2 M3 O; X [ set label energy ]
% y' @+ J4 U" e6 J [ set label "" ]
( b6 N( [: I0 U3 h ]) ?% Y8 f3 v, [& G& C% I# f
end7 R8 A) B; z& L- y% Z
to reproduce
/ ]0 G1 \: V% k7 c- v% w# v ask turtles [8 A' V( I8 l; I- {4 t# P8 B# r; W
if energy > 50 [
; @( k; P2 o8 |$ z set energy energy - 50
. n* _" {5 x8 r hatch 1 [ set energy 50 ]
" S e: r) O$ d1 O ]- ~% W$ G2 p( n# r% v& w
]
* b" h, S$ L$ K7 C7 Xend
, s7 z' Y& t# w) y& d; {8 v1 Uto check-death4 h4 E2 ^+ F& v; r! X- p1 l1 n
ask turtles [
! R6 F( a2 @- |; E( r/ D$ x if energy <= 0 [ die ]
^6 r: t" o' _4 e, ]$ r8 { ]
4 c: V# P; D2 `- lend! b2 G: X! i8 I
to regrow-grass; |$ `/ f* u5 t6 g
ask patches [" S0 |# ~3 X+ m" h6 y, o; Y
if random 100 < 3 [ set pcolor green ]
5 T! w) u2 D+ z. c& m0 A' i9 { ]
" V0 U: A' [* Q& |3 gend Q8 V7 V5 O. o1 y, l& ?
to do-plots
2 C6 }, `" u% X N6 I0 x% S$ X, Q set-current-plot "Totals"8 d& S% S5 ]6 j! ~" O
set-current-plot-pen "turtles": _3 A5 r3 ?6 `5 F% u( e
plot count turtles
# a6 |. W7 g- G set-current-plot-pen "grass"
6 a. w `: q4 e' U% E+ L1 u plot count patches with [pcolor = green]% {! Y4 k/ B6 c( e
end
, v' V' Y8 O+ h7 }可是运行时提示no such plot: "Totals"+ N0 }. c% x' k3 L% i B
error while observer running SET-CURRENT-PLOT1 Z" N8 }9 H: t( z7 x4 t
called by procedure DO-PLOTS
" H3 y7 `: I+ @3 a) Y" C$ h called by procedure SETUP; J0 H/ H# z( _# i: P$ q! O+ c
called by 按钮 'setup'
& J$ v R: H0 i' {2 S8 ~- v3 S求大神解答啊 |