我编的程序如下turtles-own [energy]& F( F( t5 i1 \% ^, z& m! x2 D
to setup6 ^- o" G! K3 B& v2 z" x
clear-all3 K& b& t: g( T
setup-patches
/ s! E( }% M0 G8 b1 C9 O0 o create-turtles 1005 _# ~8 w% M( O/ Q( o1 B( s
do-plots
! b+ K# l2 {; c/ r% W" I$ B ask turtles [ setxy random-xcor random-ycor ]
& _5 [/ t1 ~3 Q5 q0 I1 q9 A2 `# |end: R9 s. b- D! W
to go7 R3 {3 J; G! m. H6 S' h
move-turtles# ?8 X! b% {% i4 c2 t! z
eat-grass& d4 Y( o$ G1 E; K1 h
reproduce
. a) |% a5 ?* {: a/ r check-death1 {5 i, `# P- n6 W7 J
regrow-grass7 p4 W! Y% j& o. ~
do-plots! R1 {% C# S% v8 R
end
% f* J3 {$ x |* z8 nto move-turtles
+ I# c2 ]$ r2 ?4 g$ J7 Q6 y ask turtles [
% C+ }5 s: z( k, m3 m+ x4 Y7 X3 t* J right random 360
. z4 O8 s: l% W! L. y forward 1. V2 I: Z0 z7 p2 d7 J1 N6 m2 E
set energy energy - 17 [2 v" b( f: t7 v$ q" z H: f
]
1 T, `4 \# ? w/ b: V" kend7 e) o( T9 ]8 ~ M
to setup-patches2 S* |- s4 J6 J9 \' a
ask patches [ set pcolor green ]
+ h6 s7 l( U; v" y0 Zend( H2 ?9 r9 T1 e
to setup-turtles
! s% T7 L p+ G S" ?& t' M create-turtles 1008 ~) C" |( q- G- ]2 O4 {
ask turtles [ setxy random-xcor random-ycor ]$ w7 g% H$ C/ Y2 d1 [0 u! [
end8 {+ u$ I" v% f3 O- n% [( c
to eat-grass
, c9 H9 [' {; X1 `5 X ask turtles [3 B( w) K; r& L2 _6 q% s; Q
if pcolor = green [
/ X( w- x5 ~5 q1 \: I$ N& e set pcolor black- h, l |! q4 f6 v: |! |
set energy (energy + 10)
: G4 } x! Q7 E ] ]
, y1 v# |9 m! t5 Z1 u ifelse show-energy?
1 R/ N: ^" ~ I. I) ?3 y$ t- j' y, m- g [ set label energy ]$ j- k3 {: \: J1 j9 [8 C
[ set label "" ]
- }) X, Q8 h# ^! X4 _; p% _ ]
4 L& b1 J2 i8 x5 l4 w+ u6 t. o% pend
7 O; r: U" M- i3 ]to reproduce
5 H& G2 p% W% P" Y2 N& c ask turtles [/ O1 R. F% x0 m8 s- n( M" _4 h5 p! v% }
if energy > 50 [
! C9 C% ~8 ^. @2 o; C" u2 P set energy energy - 508 i- `: `( }0 d# i U8 a
hatch 1 [ set energy 50 ]
) x6 B1 d& W% S. `4 H ]
( w( L+ u. E) c, W- m8 O! D ]
& |& w6 \7 l' J+ ^4 k3 ^end
# Z% w- z+ i0 c) S8 @0 fto check-death% Z& @: ~3 F5 |2 i! X4 q( r
ask turtles [2 p2 X9 m/ d: C: J7 Y, J1 d0 Q7 M
if energy <= 0 [ die ]
. @5 n9 p3 s c! _4 u1 ]7 g ]
: s& }& }7 |1 q" Jend1 E# `- A \5 Z7 t" v4 Z4 o
to regrow-grass
, D$ f6 k% s3 U8 W8 a ask patches [+ C2 p( r# h1 |1 d* x/ J7 ^ S1 k
if random 100 < 3 [ set pcolor green ]
- ]: o3 {1 J! O- b3 K" p4 F ]& B7 I" i2 o6 W
end) W% f2 B3 x% F" ` o) r
to do-plots
. `: U; [1 @, z/ u set-current-plot "Totals"
$ C3 z% q; L* h% @4 p set-current-plot-pen "turtles"
& c5 c* S8 O' ?. S- t! q plot count turtles
3 B8 X6 Z) U6 C set-current-plot-pen "grass"
9 s9 T8 f, R! h! R; K* u" ^6 n plot count patches with [pcolor = green]# G1 }+ B2 c4 z9 ?* T$ w$ F
end4 d/ b+ [% t; J& i
可是运行时提示no such plot: "Totals"3 z7 q" j3 J9 f. C) V
error while observer running SET-CURRENT-PLOT
& h K( x* ?$ E3 N called by procedure DO-PLOTS
j- O/ ~8 [: l; K# N& l3 y called by procedure SETUP
5 x* o+ @* L1 m* S# i5 Z& C called by 按钮 'setup'' s2 @9 \& n/ q) l- i1 E( t, |. q
求大神解答啊 |