我编的程序如下turtles-own [energy]
4 J' H5 l; P' s- O5 h" N# d$ u7 l$ Dto setup3 H! V6 L, l# R
clear-all& H% h7 P: C x0 ~3 o
setup-patches
5 X7 T9 Y. a6 {; s4 |1 {, Z$ j create-turtles 100
3 M/ c$ a- _4 U) N" p do-plots7 A5 T( a8 m4 S
ask turtles [ setxy random-xcor random-ycor ]
3 p! I3 _1 R8 }0 Q4 Hend
6 A$ Q9 H* N1 H. I. Y0 Z6 ?, ]to go1 B9 G {- N% t( _
move-turtles
' A1 A2 P1 `6 C& l) S: G7 Z1 L eat-grass3 x: R, z2 j9 X- |7 H
reproduce
6 Y W3 d* P0 O6 C% U1 U% Y check-death
1 l. p( ~& C, ] regrow-grass
4 U. @: B3 i/ [: P do-plots
: f4 v, Z; w; E% |end' r' K! q/ p6 a9 b8 _) k5 @
to move-turtles$ T" \, O3 s! L1 ]/ g
ask turtles [0 w+ V1 ]# N! m/ ~
right random 360: V Z3 m/ Z$ k6 v! X
forward 1
& F# C N+ K! X* o set energy energy - 1
* n$ m2 A2 g2 W ]* }) V; T4 Y7 y" G6 I
end
2 t0 p' [: b$ K( jto setup-patches$ S9 P3 _4 y: k' \* @. L) X% G
ask patches [ set pcolor green ]1 i6 _! ~4 O2 j. B* k7 K: b; ]
end
% M" b# Y2 R# y+ W! a+ K2 B# Yto setup-turtles
* T3 ~% `& S: z' q* R9 m2 V create-turtles 1004 Q2 r; }3 Q3 o
ask turtles [ setxy random-xcor random-ycor ]6 @' C6 [9 u! e+ L! H$ G
end9 i( a \. W r8 t A9 B8 e
to eat-grass
2 o3 c! r% x' [" k& L ask turtles [
: i; |) c0 W' h1 Q7 M if pcolor = green [3 H1 Y' k5 o) h3 Q; B' r1 y
set pcolor black( o9 @) [! y$ }" V1 E
set energy (energy + 10)
8 }2 l/ d/ {& Y' ]" B ]
+ @2 S5 U3 v& k2 i/ k2 B ifelse show-energy?
: r5 I6 z4 Z) m8 B9 G [ set label energy ]2 c/ l4 u4 @+ x9 B% Y7 i
[ set label "" ]
6 a! T* u: {# ]2 q0 c E ]
) l6 ]% ]0 ~0 |7 b) X1 Yend
1 H) B8 N+ u2 Gto reproduce
7 \; g `+ i" m3 D8 E+ m ask turtles [! j8 k, W) {/ ?. R
if energy > 50 [: Y4 g7 }3 x* ~+ X' f5 L7 X* ^) G/ ^
set energy energy - 50
% ] {$ l$ }0 b$ w6 c! T hatch 1 [ set energy 50 ]* c3 @. P9 k! N4 K5 b+ U
]
. ]" d3 E, T9 e" X2 a ]
; s- P' p: k6 W" y( m% H0 B: J6 mend
z4 _; N8 n4 [( P6 ?* Bto check-death% T& g7 _3 b, F8 v z
ask turtles [
0 N9 Q) h2 x. C& b/ v if energy <= 0 [ die ]
' n0 ~; ?/ E1 x$ n ]
' G: J3 N5 u7 P3 O3 {end$ _. e* {4 g2 y, H4 h" t# y3 e
to regrow-grass
q+ c& h: o: b ask patches [
$ ^3 T( I# l [ if random 100 < 3 [ set pcolor green ]% e8 j4 h2 X( z) U; z
]
% e' V; }" k. J9 M. T9 y3 @& Nend
/ T% N) U9 `* k% |to do-plots
" ?5 V& H$ d$ s' T set-current-plot "Totals"
. o! }9 P7 H3 }# A set-current-plot-pen "turtles"
2 F2 |, j4 h) e5 K3 \ plot count turtles
) y$ Y* Q: ]2 q9 I set-current-plot-pen "grass"1 @1 o( e5 v# ~4 P- l* A( t
plot count patches with [pcolor = green]
- C7 ~% Q) P7 X" d8 `end
# }4 \# b6 L, Z, Q1 ?6 x8 C4 M) C可是运行时提示no such plot: "Totals"4 a4 i. `; x5 |4 e6 \
error while observer running SET-CURRENT-PLOT4 H) |. A8 {+ ^2 _/ D5 S
called by procedure DO-PLOTS6 L% Y) e5 J, G
called by procedure SETUP2 n r: g3 [% r( O# A5 J4 G0 Q
called by 按钮 'setup'- R: u2 j* r# } g, N7 P% x
求大神解答啊 |