我编的程序如下turtles-own [energy], D# I7 u z8 I6 ~# m
to setup
+ @6 H3 @3 N- O! p5 w" \ clear-all* x# K8 g: e! O9 g/ K; v
setup-patches/ u5 U9 \) O3 B: W8 J5 N
create-turtles 100
% M( A3 W" \, c( p do-plots( \" L% C& G6 E7 ?; m0 A2 C3 h3 T
ask turtles [ setxy random-xcor random-ycor ]
+ O( d' ]$ Q0 f# c2 b1 Zend; [- I! h$ H, z
to go
# U+ \. `/ L3 i7 H# F' S0 z move-turtles0 g. n# q8 q. l, j
eat-grass n* u4 d4 j3 h
reproduce
5 `. p G+ z' L1 Y5 g% O check-death
7 J/ K! S% b, W5 M regrow-grass
8 g. K, t( B3 u1 z& K; ] do-plots2 L5 b9 U; k h: f3 a) a! T
end3 S9 b; ]+ p# k: _, L
to move-turtles
# J# P# T7 h+ s$ j ask turtles [
1 c6 z0 @( _/ m" s; P: U/ f right random 3605 s% F( U! ]) J- u: {- Q# o3 J
forward 15 W# G/ `$ z# A4 Q3 f3 k
set energy energy - 1
- v& @, T: F5 g/ s4 i9 }5 Z ]2 [% f' g. l; R( g
end
4 a: i5 F4 R& A5 a8 jto setup-patches
1 E6 m4 O; z2 X8 K9 ?9 l9 _' P6 M) p9 ^ ask patches [ set pcolor green ]4 q9 r! `) K$ P1 M# Z! z+ G
end) e4 y5 E; G; Z1 w; w( \
to setup-turtles
0 B, j. H6 C1 O0 Z create-turtles 100
1 o% a" V* U; I& Q ask turtles [ setxy random-xcor random-ycor ]
# K4 p4 f* t- q( ^7 @end
, c: T7 ?0 ^6 j# H% p, x1 Eto eat-grass
/ x4 C: z+ s# Z* t" g( k0 e$ F' T ask turtles [- I, |% L$ c# d( f' `
if pcolor = green [9 H# W! E# A: H+ h3 k: V% H
set pcolor black4 n% u4 ?: a' S% ?/ o
set energy (energy + 10)
. w7 d" L8 k' F3 {7 o4 o0 N4 V3 E ]
/ Z0 n! ~! M( @8 j ifelse show-energy?- k8 g3 E4 ~5 a8 \' |, {
[ set label energy ]" g) Q+ x1 V- l. C* K1 i5 Y+ \# k
[ set label "" ]$ L* t$ c9 {8 ^' `3 X' I
]
- g& h+ q% Q2 b7 m. wend& ]8 J9 x) Y4 E1 b( a+ N
to reproduce
' \; I' b. W% a, a ask turtles [
' i! F# M o, t0 D! ~ if energy > 50 [' Z8 \ O4 H! O5 B& O. ]
set energy energy - 50/ s+ Z; g1 f6 q3 I$ ^
hatch 1 [ set energy 50 ]4 J7 G# x1 Z& H+ z3 @4 n% \ u) F
]
; ~# M7 p5 T, k ]0 v" F$ _% C& ~( R$ l1 P4 e5 N
end* @0 Z8 [* G) c
to check-death! H7 I1 x( B. `# }9 }
ask turtles [+ P" G& e/ g+ e
if energy <= 0 [ die ]
5 }7 e$ I5 @. Q9 R: S1 G6 q ]
5 y' z6 M& H5 E+ `2 Kend
$ L9 {2 Q5 D0 d: h' Wto regrow-grass
3 b& z' v$ S1 n# x) \" M ask patches [
# p" Z3 w$ n! l if random 100 < 3 [ set pcolor green ]
) C; D& }$ P; Q$ q6 F6 I ]
" e. P8 K' Q" x- Z& Aend
$ m+ t! ]9 Q4 `4 B. b: o( Bto do-plots1 `3 ~, h% p+ G4 @6 |
set-current-plot "Totals"# J C1 j( V3 E1 s3 Z; y/ r% D. u
set-current-plot-pen "turtles"
9 X4 C7 l/ N* a+ t9 H9 C3 ~, I plot count turtles! F( y$ _& |% U/ ]# M5 B2 z. k
set-current-plot-pen "grass"1 D+ f. }- _) ~; g* l
plot count patches with [pcolor = green]
9 L7 \' z+ ~% [2 w% J9 i0 Kend" d# b+ `$ w3 K f* \: }
可是运行时提示no such plot: "Totals"1 h' p) [2 {( {
error while observer running SET-CURRENT-PLOT2 f7 `4 A& H! U$ H5 O+ F, g
called by procedure DO-PLOTS1 C' e' a9 E: o5 ^& N; w+ D
called by procedure SETUP4 h4 X9 A. W' E( x U
called by 按钮 'setup'
4 u# M, j. R8 l+ J1 t1 M% Z求大神解答啊 |