我编的程序如下turtles-own [energy]4 Q) A { [- _) `1 l
to setup% H7 [+ ?, v; O* s4 f
clear-all
/ ]# n* G3 p, e# d. b setup-patches" i7 [# }9 w# |2 ?7 d! `6 c
create-turtles 1003 |) l7 N7 e9 M p
do-plots) ^. E; t: l! d/ ^" W, ` E
ask turtles [ setxy random-xcor random-ycor ]
2 `. w f# g cend, W. y( t4 z# L* ]1 |
to go3 v2 O; |: U6 k$ I e
move-turtles& S+ P1 x/ r- G2 D
eat-grass2 c4 i4 r" y. u3 y* `! |+ C, v
reproduce! K# l% z$ C; {7 q
check-death
$ o/ q( ^. V( F) v$ c3 B; m& x regrow-grass+ U* E- R# F& x: N% m9 ?
do-plots
: {) S) v ]: ?/ l8 Mend
2 \& ^$ f% f, c. oto move-turtles
9 i" y: {: h0 d ask turtles [8 x s1 m1 e$ V
right random 360 X6 t b# S2 q/ X3 z2 }9 J% \$ m* ?0 U/ O
forward 1$ U9 W8 m' W- P% c4 B: V" G
set energy energy - 1
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]+ P4 r' M6 Tend! `9 l ~& A- S! ~' r$ x
to setup-patches$ B; X0 n$ |7 ~8 y+ U1 G6 [
ask patches [ set pcolor green ]: r+ w4 z( i( ~ G) F, B
end# x' {8 H1 {9 G6 F( f0 m! s$ X7 ^
to setup-turtles
! @/ R1 ]/ t2 H" t: Q( V8 v' ` create-turtles 1008 A; Y9 y# x% W) h9 @
ask turtles [ setxy random-xcor random-ycor ]9 `9 h' p% M' x& X8 a* h
end
, F& m) n4 [: q- Y8 }to eat-grass! e* v$ S) t* Z6 R' A( a, L
ask turtles [* [4 b5 E- r7 b y- @* K
if pcolor = green [
! B- _' q- \( K+ e# S set pcolor black
1 e3 |* i3 Z; U set energy (energy + 10)
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ifelse show-energy?9 g+ V$ C1 K% O0 z2 [
[ set label energy ]* Q" u/ b# J7 k4 X6 b1 b
[ set label "" ]$ |2 Y3 B5 F0 C9 c8 n
]; u* ?0 A7 m/ F& |, U3 q( x
end
, J/ t" _( h, y$ n; m. J. `to reproduce. v! P% V5 X) _0 A1 V) F; j, @
ask turtles [
! Y# D0 o; }% K4 D* A! i, E if energy > 50 [
7 B2 l) C/ J0 {9 `% z! o1 c& E. _; D! s" ~ set energy energy - 50+ d5 u$ C! K8 F4 b- U+ t) {, \8 w2 {' H
hatch 1 [ set energy 50 ]1 a W# \+ h& N, G
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end
7 x& ?/ L, t! A5 @* c3 C% eto check-death
: G- {' k4 i& M) K& u0 T ask turtles [
( U1 ~% K/ p5 Y I# ~6 ]3 p8 z if energy <= 0 [ die ]
2 `) u! [5 E# w3 Y ]# a* y2 W; [$ H9 `9 `& z! \/ a
end
2 L$ u: T* @$ U; g* A# Z5 dto regrow-grass
2 q! B" S8 \9 `. q E2 l ask patches [5 a( T( @9 y. g8 i; e
if random 100 < 3 [ set pcolor green ]6 Y& o% @: Y+ O* }
]
5 `5 w2 R' Q3 v$ B$ W4 x) Lend2 @3 M) w4 m) x: E+ {) M8 r
to do-plots
3 Z9 y) s! m" L |( D% Q5 g set-current-plot "Totals"
7 W& L/ k5 K" G4 ?" w W set-current-plot-pen "turtles"0 u3 P& \1 R8 X8 Y2 E$ ?7 f" e+ P- i
plot count turtles# \, E1 \, e7 O/ o, q
set-current-plot-pen "grass"
/ G% U+ G9 Z6 G- e plot count patches with [pcolor = green]$ @6 h0 H2 ~1 x' ^
end
! I3 I3 Y9 K3 D2 h& t可是运行时提示no such plot: "Totals"& |$ x2 X% X) }3 n8 U4 `. V4 b+ x/ S
error while observer running SET-CURRENT-PLOT9 h5 n$ ~# V: Z
called by procedure DO-PLOTS& l$ Z+ U: l/ Z1 P0 a% g
called by procedure SETUP. I6 t7 G$ O G
called by 按钮 'setup'6 L4 ]* ?# i1 O/ n2 E
求大神解答啊 |