我编的程序如下turtles-own [energy]
* ]9 i' ^4 C# t2 k) Gto setup* j. |& E& i1 v4 \3 F' _- v1 K
clear-all8 k1 I" B6 o' o @
setup-patches# D" r$ y' b8 O1 V
create-turtles 1008 c! {$ ?* ?8 Y# t& F" r" u
do-plots
) M! u0 L1 \7 o6 `8 n; x/ H ask turtles [ setxy random-xcor random-ycor ]* v" i' V, k# k0 {
end4 c/ n3 E" W# F3 Q
to go# f1 Q1 X+ ^! R/ l7 z' W: N6 a5 X
move-turtles
' Z) D; j3 q' B/ K1 X8 \! C eat-grass
5 n& @* {( z* k) f( t( h; j( y reproduce! Q, z" u8 O' k+ P
check-death
S. y* M: c# \9 G. E regrow-grass$ C- l V3 s; c6 V) r% `$ O
do-plots
% B! s o' u6 T1 B7 P" W! ^end
. Q( @- k9 t4 U' _+ `to move-turtles( J" P4 E" V1 ^0 F. r0 M, l" e
ask turtles [& F/ j; I& c3 D* w7 x
right random 360
- t& A/ Y- b4 i forward 1, d. Q5 U4 O3 R9 Z( V; P
set energy energy - 1
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end1 ]* t; g4 Y( ]' E1 x3 `' o6 D
to setup-patches
# x& }0 V# x0 r" h! K- i, I* n+ S- f3 v ask patches [ set pcolor green ]1 d& n# e6 I2 `9 R- r+ K$ L
end
5 P( T r0 ~( [ Q! j! L l( `to setup-turtles
& q5 i( @1 h$ {/ U# C. V; u" F create-turtles 1007 u! b* n1 V, P% j& s
ask turtles [ setxy random-xcor random-ycor ]! ?7 c$ K8 X+ a& ~: [: ^* d
end
. s, I6 b$ z( F; e( W' ]to eat-grass! n* O% U) s" q" M. K
ask turtles [
, k; c2 [5 r9 A if pcolor = green [
# p; k9 V0 ]' v+ H set pcolor black
) x0 p Q/ Y5 H! e set energy (energy + 10)3 D+ o& p, v6 P+ A; ^6 G
]% F0 t' h0 o8 t
ifelse show-energy?
3 P5 b# e, p5 }6 [ [ set label energy ]& Y) n; M/ U+ t0 u
[ set label "" ]
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end
; x7 i# G3 s6 ?8 s2 |7 ]to reproduce
; ]! i: f' a C4 Y9 j ask turtles [
1 z7 K9 r0 {+ u$ w$ q. d$ x: u4 |: ^ if energy > 50 [; G0 E+ L. E, [
set energy energy - 50
, r' z: T/ Z Q2 X" V& v hatch 1 [ set energy 50 ]. P% {/ d" Q; r. L, y
]
: u: f4 U' n y' j) l ]* u4 Q# \( W/ c* X- O2 W
end6 ~9 A w1 y8 h% x& j. v
to check-death) [3 f5 d. m8 l
ask turtles [
# v; w2 }" k: N7 o5 S2 N if energy <= 0 [ die ]
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end2 { e7 C( u( g- V( |/ ]) B0 d
to regrow-grass' W- v. _4 G& q2 T
ask patches [5 r* G# \9 m/ C7 P
if random 100 < 3 [ set pcolor green ]
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end5 v/ J3 ~* V& |+ c& S+ T8 _' X
to do-plots$ q- e! @) A9 {9 p, T' D
set-current-plot "Totals"2 N" |2 w7 ~, d; N7 M: z0 S6 _8 @ L8 I
set-current-plot-pen "turtles"" s' ^+ q$ s$ F! |% X' _* Q
plot count turtles$ C' D$ d/ t) @* {* }6 u% ^
set-current-plot-pen "grass") R3 M+ t7 E0 H) t
plot count patches with [pcolor = green]
/ z% G% S {7 r- S( a) yend
9 @ ^) p+ J1 p$ B' a可是运行时提示no such plot: "Totals"6 C# W& Q4 c' _' a. _: [. X& Q
error while observer running SET-CURRENT-PLOT2 `! j" O* ]" l! _; y" K, y
called by procedure DO-PLOTS
9 w1 r! W# S' V1 Y& [ called by procedure SETUP [% m; ?9 J D2 C/ T
called by 按钮 'setup'
; g1 i5 O: c$ g4 y9 c' z求大神解答啊 |