我编的程序如下turtles-own [energy]
# m3 h M/ a" V: m- @to setup
7 {) o' s' ]( p5 I2 ~' Z clear-all
8 c* y. v' P+ R4 ^& Z% ~ F setup-patches
" W0 T& f' I( g3 o1 S- I5 i% r" r: H create-turtles 100
$ p; E" O2 u. v# v% t9 j6 a do-plots
& w+ n1 X- e# H0 w ask turtles [ setxy random-xcor random-ycor ], f! D. r+ I9 [+ @! _$ d
end0 F5 W$ }6 w( Q n$ r
to go' i& P& }5 @7 j& c6 G
move-turtles
; Z4 ~$ }$ |5 M1 q/ R0 N eat-grass' n0 b5 P" x( M( y- T
reproduce
5 H- c1 q8 F. H7 D. F check-death3 u% L$ x5 K2 d+ ^4 m/ |
regrow-grass
. U5 J! E( ?0 s: h' W: E do-plots
; `1 y9 e1 l& U' r8 C0 Eend
1 Q& D4 A; w( C& q( Hto move-turtles
( y( |$ \& S$ D1 x/ _4 f1 G9 u. Q ask turtles [) v! Q; J, G2 R& a. z% T) C
right random 3609 O, ^+ n0 ^% h3 Y6 S+ [0 P% }# D
forward 1
, ~; ?, L3 r4 q set energy energy - 1
4 M% R' n4 a+ n ]
6 C* v6 d' E: R% G: rend- o1 m* d( k! J7 M! s7 @2 {
to setup-patches; g. ?9 g4 H, T( ?/ R9 ? e% G
ask patches [ set pcolor green ]0 B6 n+ }! W7 U7 S4 W _# m; h
end5 Y) ^9 \. b, x+ \) | W
to setup-turtles+ q& T. y4 i+ S4 u l( n8 b3 }
create-turtles 100
% M: Q' e. d, s( Y ask turtles [ setxy random-xcor random-ycor ]' ?, T5 \' e) _
end
* r, \% B+ {5 G. ]& eto eat-grass) B& p1 j6 x, w9 T5 Z' @5 ^
ask turtles [
$ ?8 X1 f! m% A# j8 a if pcolor = green [
# }4 r P: l5 j" H3 X' o0 @: u4 t1 t set pcolor black H N! L5 U4 I2 f
set energy (energy + 10)
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ifelse show-energy?/ M( i' b# v' v `, b& T) W
[ set label energy ]
% e% X4 l* {/ H& T3 b0 R [ set label "" ]4 a k# x. \' P h- R8 Y' c
]1 V. M- I6 w* e
end) h; d* `. ~& |; ? v
to reproduce
4 j1 z5 _9 }! a% s1 x7 l ask turtles [% T$ F3 X& }/ ^: \- z9 Q8 Z
if energy > 50 [
. N3 u' X; P0 p) g6 O set energy energy - 50
; Q5 T: }) r3 |# s hatch 1 [ set energy 50 ]
r+ r' t8 f" P7 s& M/ V ]
' J$ G) N) W, Y1 E/ u2 E6 w/ F ]! G8 [4 M( Q& G! f* o
end7 H1 `/ ~( L4 e; D7 ^
to check-death
t. T! } y) |; V8 V ask turtles [
9 E: ^- }% k( O1 ? if energy <= 0 [ die ]
% X0 K. e: y$ i) X ]" h7 h4 {5 P) `1 w6 q1 \* k$ n
end# x7 ~$ \9 Q* n- U
to regrow-grass
" |% g8 \, M5 ]0 m ask patches [0 O$ T) n8 k l$ f7 x( ~
if random 100 < 3 [ set pcolor green ]
8 z7 T/ E' V7 f6 H2 h' \' x9 `' P ]
/ w0 e$ v+ r5 K/ o) a/ Tend! x, f2 X! {6 x' N2 c- m/ o
to do-plots
( c; |' i, D0 y z set-current-plot "Totals"
% r0 B, W8 i2 W0 z) G, e set-current-plot-pen "turtles"" w; Y" r: B8 M
plot count turtles
# c& @3 I. k; o5 j: N/ [" I8 e set-current-plot-pen "grass"
4 i' ?9 w- ~6 g( }; E/ T# y, l plot count patches with [pcolor = green]
' d4 d' x' F. b) lend! i9 z5 o/ s. S! X1 P/ Z/ k
可是运行时提示no such plot: "Totals"
8 D- r4 d; J( `' w* q: g$ X4 L6 Berror while observer running SET-CURRENT-PLOT
* N# o3 ?8 K2 j2 Q: j! C called by procedure DO-PLOTS
& E5 A2 N A0 B called by procedure SETUP4 k8 u2 z- c/ Q: C# c5 K2 A
called by 按钮 'setup'
' v( @2 }1 _+ D; E: u求大神解答啊 |