我编的程序如下turtles-own [energy]
$ ?" q8 M8 {0 j$ y" t1 Eto setup2 Z F1 L2 {; Q+ G6 c
clear-all( L, Q9 f. Y1 j @! a @
setup-patches2 b6 e2 L6 m9 w. N. I" e
create-turtles 100
$ q$ u) N2 c* O0 i! r$ s do-plots4 X& S5 ^0 C5 ^) i- _
ask turtles [ setxy random-xcor random-ycor ]
# o% Y( _* k/ T: G% [" }end; ]. d- R2 D4 \: K
to go$ P( a- Q& i% B/ z4 I
move-turtles
1 A A/ S( i! J3 N0 {) `/ J3 q5 E eat-grass- @6 {; E% H; D
reproduce9 _# `: X$ g; Q* c2 h: R2 H u
check-death
" }1 i$ ^1 v1 ?) k! g regrow-grass
# ~& D' W7 Y6 V2 q do-plots
1 ?9 B: ^2 R0 z) ]2 c" Vend4 ?2 z$ J7 j" v- \
to move-turtles
; g8 R1 P2 A2 J+ H ask turtles [
' N( U/ r0 m; \4 Q b7 T. k right random 360
: y3 e$ s$ e9 _" A5 \& m forward 1* K8 p& I# V9 U9 H. \
set energy energy - 1
6 k3 w2 A* a# W0 t: X5 t7 r0 L ]
' g1 x% V2 K& a: Zend
+ n# d1 M3 U! P- oto setup-patches& [$ y# p6 ~9 q: N) p9 m
ask patches [ set pcolor green ]
x3 e% D" _- ^7 l5 l# Q# l% d* B3 r! Pend
" D, b- }* i- @1 nto setup-turtles
$ _* u- X- y, `; L3 \3 v create-turtles 100
* W+ ^! Q4 n8 |4 E* L3 A ask turtles [ setxy random-xcor random-ycor ]
- d. f2 w' r0 K. }+ yend
# p/ L C" l; q' n# Cto eat-grass. i# Y. f# c' E7 ^+ w, S: `2 D
ask turtles [6 z; _$ }8 m6 K1 c, u& G
if pcolor = green [% H* o4 q: \" r. A
set pcolor black
u! J$ {0 s) d$ G! z8 w% C set energy (energy + 10)
8 L. O$ K& s- Q0 O/ m& ~2 B ]
$ \2 q" a0 p) @- f. T; q ifelse show-energy?; I$ }3 o' S* P" E( G9 l9 H6 v6 \
[ set label energy ]: i; L1 u& e( h m
[ set label "" ]
8 [( Q% y9 y6 [: w ]
" Y v' x8 q/ _) qend; o* @6 Q5 g, V
to reproduce. r( U5 j, W% U
ask turtles [
, i8 X2 n" |( E" o5 I if energy > 50 [5 Z" l/ K. t- S6 L$ L5 F# I3 t7 R4 G
set energy energy - 501 u0 D9 U& p8 w/ I) P' W1 X
hatch 1 [ set energy 50 ]' ]7 D+ K6 @5 B1 f! \ m% z+ [/ v0 ^
]
' }8 |) o/ }0 N% [5 I S ]
# \& X" b0 P, f$ kend
- r" o. o' g4 f* f% zto check-death
I$ d: S. J1 ]! c1 J; N ask turtles [6 O. j3 C ]2 r4 p' g
if energy <= 0 [ die ]
% M+ p! {4 u+ K; a2 M0 H; G1 | ]
4 z+ e8 O, H$ G# p9 L% l! |end& J( r4 Q9 G2 S+ {* c! |5 e
to regrow-grass( h2 g2 q. ]- y5 T$ r3 b. G
ask patches [
5 [" M: @8 c8 i if random 100 < 3 [ set pcolor green ]. h- s/ m$ ?$ ]. {! _
]" v8 A% K0 b7 j( X( h. X3 |
end3 {$ R8 w- m1 W5 l0 `' J
to do-plots( e' U: v# s$ z/ M1 M. _
set-current-plot "Totals"
2 s1 u: O6 W8 X' l) L5 h set-current-plot-pen "turtles"
3 O- j2 {+ f4 i' e9 C& K plot count turtles
& D Y0 C. C' v" A/ k" F* x5 S set-current-plot-pen "grass"5 _/ R4 ^! C& v8 _) B
plot count patches with [pcolor = green]3 ^0 y# \# P: f' z7 p( @
end* c$ I2 V+ ?/ @1 z3 s6 W
可是运行时提示no such plot: "Totals"5 }4 a6 t' N: R1 H1 Y& D
error while observer running SET-CURRENT-PLOT) V j6 T6 L+ s3 f$ z4 x+ B0 |
called by procedure DO-PLOTS
# m9 H9 A# q& n1 N2 I2 I+ c called by procedure SETUP9 K, `- Y3 L; M/ I" f; w
called by 按钮 'setup'0 ^0 n0 b' O0 s: k; C
求大神解答啊 |