我编的程序如下turtles-own [energy]
, W: v S2 y" M5 ^1 Q3 E1 R9 jto setup
8 `: _$ r5 F& q& C3 W5 _6 b; B clear-all
) V) H8 t3 p% h, I& g# d$ x setup-patches
" s0 `2 a: R: H+ b& e create-turtles 100; a: A; x- l2 C( Q, A/ I# ?
do-plots' I' R8 }7 q2 I) I0 x5 @
ask turtles [ setxy random-xcor random-ycor ]
: Q& ^6 I, q2 s; Z# G& Iend
* E) S H+ s' M( N e( Mto go
+ A" O4 l/ ~; A move-turtles
0 q6 e' H' G4 O8 i+ L2 o% a eat-grass7 w! { J7 o! d/ [% C
reproduce
5 ]2 p6 n* |3 ]1 {; N' |# N check-death# D% X7 a' h. v& M4 L4 b- G: y
regrow-grass4 X, R1 o$ i8 S5 X/ c% D
do-plots' f# h! ]2 R8 t+ R& s( O1 A
end9 T8 n# G' u% {6 ~
to move-turtles# m) Z% v7 v/ ~$ ^; P+ T8 a
ask turtles [
! b/ J+ C4 U+ j I4 _ right random 360
" B* i" C# w2 z forward 1
8 |) X$ \# D& H- _$ h8 y: q set energy energy - 10 d& m% F+ p& J6 b* q
]
; A2 {8 i% B9 P' n7 Rend# c8 l9 A, w; w* w
to setup-patches- G' V7 U& V1 u4 L- x5 ?, F. O
ask patches [ set pcolor green ]
% T8 z; q. A6 Z$ s' ]) Iend
& n* [: R6 d' q! B. |to setup-turtles1 [8 w% M; t/ `- D
create-turtles 100! o, j9 l: p7 n6 N6 w2 w- g
ask turtles [ setxy random-xcor random-ycor ]
# d# A$ O+ F. f2 H0 iend
) h. U2 j) V. F, V3 u5 i( Jto eat-grass3 p1 g* {" o9 ^9 B8 V b
ask turtles [
! E( a y k5 L9 f+ G/ ? if pcolor = green [
3 P" T& [- v. B* @ set pcolor black$ d2 U' `1 G" @5 P: O
set energy (energy + 10)
8 W/ E/ K g, {( f$ T4 R ]# d( P9 u) V, h& a' P# U# |" S
ifelse show-energy?
5 Y b$ \& B: a: z8 H, H, r' | [ set label energy ]
% e% f) b; [1 @) N. G [ set label "" ]
& j. x& R9 i2 L ]1 j8 r0 u4 m& T: H& x
end
( m& M# i7 t6 ?2 W- e- A% ^" ]# Gto reproduce
# X4 U, J9 y- ~7 E! O ask turtles [
" ]3 l4 |% A8 l* q if energy > 50 [' e1 W3 e3 K( Y* W4 H
set energy energy - 50
9 j" X$ a' [: a1 O0 g X$ \ hatch 1 [ set energy 50 ] p3 W0 n, f/ k2 q
]
0 j, M( s( `5 x ]& m1 m' w/ W ]$ K& K7 n7 [8 ~6 z
end
- t0 M" t2 p6 M) \ J, Y& k. Pto check-death
+ y) z& m6 S* v m ask turtles [
3 [' f+ y M% {: ?9 b9 s% r if energy <= 0 [ die ]
' u' w5 U. @& q2 L+ n3 S ]; M$ g" ]7 d$ I; a7 Z$ H$ H3 G
end3 z5 n' ^6 P% v
to regrow-grass
6 `8 A6 ?. x0 j+ }; u# g% v ask patches [
; S- K* }' U& D6 y if random 100 < 3 [ set pcolor green ]2 j \& G: z# o" C
]3 A$ ^4 I& P; Z, m5 f4 [5 N
end
8 m9 ~9 ^& Z) \) C, \to do-plots+ b* P4 L4 Y0 O) H0 U9 |5 T7 B* J
set-current-plot "Totals"- s0 \, Q; ^+ e* \7 d
set-current-plot-pen "turtles": ^3 ~9 g1 x& Y2 h( B' T: M1 I! p
plot count turtles
8 K$ @$ _: m- G. s. g1 F6 z* N set-current-plot-pen "grass"! h% x/ I9 s. y2 K/ e
plot count patches with [pcolor = green]* {' `7 e" m2 \% O& y
end# d) c+ ^1 X% X% ]
可是运行时提示no such plot: "Totals"
1 k# v$ Y) @1 q1 t6 k7 Xerror while observer running SET-CURRENT-PLOT3 E! V' N" [$ I3 n/ r: g2 a6 k4 K) z) ]
called by procedure DO-PLOTS
! }$ V! @3 m" e( g* E% i called by procedure SETUP
& y' H4 F: O) z' T0 E! I called by 按钮 'setup'$ X- U8 @5 j/ z# T
求大神解答啊 |