我编的程序如下turtles-own [energy]3 m. d) X& z. S. } ^
to setup
. ^" d$ r# D7 }, }! q) I: L clear-all
1 X E* c: S! x+ S" y( S setup-patches" e7 y" a" o8 T( D& \
create-turtles 100
7 l9 y. ^/ S7 u+ X) F5 l/ u: Q do-plots! r, e! W8 H0 t/ z+ ?7 j( V$ ]
ask turtles [ setxy random-xcor random-ycor ]7 A3 o6 z9 x6 x C' M7 r
end( R4 k# y$ T& U5 H: o: i) O
to go
\) l: ]9 K$ ^" y2 \' x4 r move-turtles8 E1 i. } e! U5 i
eat-grass) X" m, q; p8 Y% ]7 `- {" M
reproduce
3 w/ W2 {: \. Y7 e- o; Y check-death3 l" T6 j, g3 s _
regrow-grass# l- m. G+ r! p8 m
do-plots
' B# h( y1 y8 } l J0 W* gend/ d6 I( N1 l) U
to move-turtles
0 m' G- |9 |% o' _ ask turtles [
1 U! h! c- |* `0 c; J- T( T right random 360
: @- E3 b6 Z( M! V) ] forward 11 Y2 v0 q; R$ D. L' o" s/ k: u
set energy energy - 1
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6 G* L4 o5 S& }end) L2 z, I1 B6 y0 X _+ D
to setup-patches
+ M( X% }2 S& T# Y+ Q. b3 C ask patches [ set pcolor green ]
) o/ X5 N& h% s% e# d7 J! a+ ~, Iend
# ` x/ Q# w- c' C _3 A) s% yto setup-turtles' P% K6 F( U( {2 }) w6 C
create-turtles 1009 X3 f2 M7 q# u& Q% g9 P
ask turtles [ setxy random-xcor random-ycor ]
+ z D9 K4 E9 R/ I5 Q4 cend% B% C; E! [+ g% L6 z) ?
to eat-grass
6 |9 m# ?/ G9 c ask turtles [$ D) I0 s1 }) k, m
if pcolor = green [5 x$ ^4 v/ g9 s. d- z# [
set pcolor black
6 J- u9 u# p' L% O) G* n set energy (energy + 10)4 k, |1 B5 Y- V5 E* `- Q6 P
]
8 D2 ^. j! ~4 w% `) I+ x ifelse show-energy?
) ]$ n Z1 {' U1 Z& u! o [ set label energy ]4 _0 c: R$ t! a# |; v
[ set label "" ]
& {& R% W; v1 `# u ]
3 ^! b; V, F( D# {9 {end. O( W' W) l+ K0 ?! E: ]! b
to reproduce$ p* n9 v0 j( {% W5 g. A/ t( m& z- F2 W
ask turtles [
3 o6 O0 }# L; L8 D5 [- K& w4 R if energy > 50 [
/ M- ]& C( ^3 Q0 J- i) k" R set energy energy - 50
2 Z) A) M. y5 M- n! d8 V, ]# o hatch 1 [ set energy 50 ]; H b2 g- F7 E$ F0 G) r
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end! j- v3 q1 n/ H4 i
to check-death
/ e, S2 M+ a+ R7 d- J1 W4 t ask turtles [- w/ X2 D; i' n5 N1 S
if energy <= 0 [ die ]
( k# _( x2 Z+ `& I ]
& b5 y; v' l3 j' u+ b8 S- lend
3 B. [; ~# e: c0 B9 y# pto regrow-grass
+ Y5 d& r; N# E: Q ask patches [3 n( U% e. @- O
if random 100 < 3 [ set pcolor green ]3 r5 C: p. l' r1 Q% c8 u
]1 v$ |7 U9 m0 _ l( O7 V3 U: D
end: X. L) C% @* N0 g1 C/ H' H; n* ?
to do-plots/ G( H$ _8 N9 v \
set-current-plot "Totals"
4 y$ o& J3 n' l+ g set-current-plot-pen "turtles"9 N+ `+ f/ _4 T8 L7 B1 C. u
plot count turtles
s1 r1 x/ l! N- b! ~: o( ~9 E set-current-plot-pen "grass"! ~- N% L7 b& y1 x6 s' N
plot count patches with [pcolor = green]
# S3 E+ M/ W2 [end5 a* ?' Y8 S# H* h
可是运行时提示no such plot: "Totals"0 p3 O+ ~8 S3 p5 e$ v: c
error while observer running SET-CURRENT-PLOT6 Q+ c1 d4 V, I8 O$ y
called by procedure DO-PLOTS0 c6 @& s7 P6 k, K
called by procedure SETUP
2 O& [9 ~ o/ ?0 e6 p called by 按钮 'setup'
8 l* m* a% Q% b: t, K求大神解答啊 |