我编的程序如下turtles-own [energy]
% K( ?" n" @3 N' P# Yto setup& c5 h8 H% o' \% T2 F0 S' P! w
clear-all m+ ~8 m) ~* x, I- A: W4 ~
setup-patches6 x7 C% A! j, I3 u
create-turtles 100+ `; }# d6 c O r; T
do-plots
$ [* T( B2 u4 u8 _ ask turtles [ setxy random-xcor random-ycor ] Q) D# V' J L
end
3 f0 a* n+ H% q. E* _& T, A3 ]' R2 nto go
( D7 A+ u0 ]6 Z$ t4 k move-turtles
3 d0 `2 U0 B2 q- p eat-grass) E1 e% q+ f+ r' N
reproduce' H2 s4 A* u! u; `7 D7 `. N2 d7 u" L
check-death p9 ~2 h$ C2 k- g. r5 B( y# |
regrow-grass+ M' K/ h4 }7 [ Q4 g5 k
do-plots; U: {# N3 T7 j [" z
end
2 j" n3 `5 S8 C3 O& s) zto move-turtles& I7 j) t! I. r X& I, @
ask turtles [; h& d/ \$ V1 b9 ^
right random 360, [3 x6 W3 C7 E
forward 14 O M6 c- C# ?* f
set energy energy - 1% F# | [- p% Q$ X k0 d
]
$ S! r+ ^7 T$ C+ I# a' ?! tend0 k9 Z# | F2 X( @
to setup-patches
$ x9 ?: y' F R5 y! B" [' k ask patches [ set pcolor green ]: ]% Y" d" z' A9 ]! E% W$ I
end% s& U% b F; |& ~
to setup-turtles% M5 z/ v( ^& }, c/ p6 l
create-turtles 1008 y4 P# I' C7 @: @' a' ]
ask turtles [ setxy random-xcor random-ycor ]8 u$ C4 s3 q. S2 m
end
* `( a7 p# O( nto eat-grass
) F# B0 b, z6 {; u ask turtles [
4 C$ V7 E B z ?2 F0 b if pcolor = green [
- R- Y' Z& H& C @) r ` set pcolor black8 M, p7 ?* @, u) }* {- @$ f$ a. P
set energy (energy + 10)
9 Z9 c2 D- R$ A1 ^, H ]4 K! w' v1 { w
ifelse show-energy?
( j; i( m# R8 _& C( J [ set label energy ]
0 U5 D! k2 [% y( L1 O1 @# q$ D [ set label "" ]
# c, `; m6 x: g. B( f8 X7 W' }6 g ]5 Q9 |+ y3 A2 H6 ~
end
T0 v6 t! ^" E3 l3 kto reproduce! U/ @+ I% m, x0 J+ S
ask turtles [
( t8 x( J; r! I4 U if energy > 50 [
: m# t4 o0 L) \2 L! t& t. M5 j6 X set energy energy - 50/ h; T+ w; C; b, ]4 ^1 o0 l( M7 c& q) H* c
hatch 1 [ set energy 50 ]
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]
$ ]& A& C+ i; g" v7 O+ Gend" f% o- v3 ^4 b5 [( _6 D, C# s
to check-death
& v9 g& ~$ R- T; {+ ]- d- u ask turtles [# _* U2 c( S7 C- ]- O
if energy <= 0 [ die ]
% F" G- B+ ?2 D. V2 I" H ]
4 i" @% D4 ?% f. P8 U1 aend
; R( G. r# T2 oto regrow-grass( U) f1 J' Y3 _
ask patches [+ u) v0 q9 A- {2 g1 f
if random 100 < 3 [ set pcolor green ]
5 ~) E% L: O/ b3 {- f ]
' e+ V: _7 Z0 `, C' D$ wend
4 y6 w4 g' Z+ Zto do-plots9 q1 @8 B3 U; A- O8 N6 `
set-current-plot "Totals"% R- x4 a( p- J6 V3 w
set-current-plot-pen "turtles"/ H# c# `, i F C5 Y% Q
plot count turtles u, P( |- Q) W i% a8 g- e8 B
set-current-plot-pen "grass"
7 f4 ]. i2 O5 g2 n9 v" u& @7 I1 T plot count patches with [pcolor = green]
0 o6 i( J2 w8 I) M8 Vend
- }3 \' G. i1 N, i可是运行时提示no such plot: "Totals"" V3 e, d& n( r9 x2 [' C
error while observer running SET-CURRENT-PLOT/ K5 O, _' _/ j; M7 L9 I
called by procedure DO-PLOTS! A0 h c& h+ T8 b4 |! Q
called by procedure SETUP4 m. J# p9 ?. N& i/ e5 W0 \
called by 按钮 'setup'; L A3 ^7 f5 _; k+ |1 {6 s
求大神解答啊 |