我编的程序如下turtles-own [energy]* Q" D, ?3 r! a% _
to setup
+ u7 I/ _) Q! k5 v$ D" u) V8 d clear-all
3 A1 w, a5 W5 h/ z) @0 U setup-patches' y: [# F5 C+ Q, ~, j9 c; s4 q
create-turtles 100( J' R1 d" p/ Z' ]5 K9 C
do-plots! K3 m$ O* E1 K. L* W; j7 ^1 ?
ask turtles [ setxy random-xcor random-ycor ]
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to go
& L5 N' i9 i. n6 T( w4 i4 W move-turtles
+ E5 h- y5 t# X& ~ eat-grass u/ f. q. n$ F
reproduce
1 R. \! q2 ^7 L9 i8 c check-death; @5 v' v1 x; m3 i. [! @. s$ D& K7 N
regrow-grass
( ^# ` [2 C9 B& q: b# c do-plots6 V/ w [! \, ~4 Y1 C1 i
end% `; ]1 L0 p, B3 ]. f
to move-turtles: j5 j8 m6 m: k' }; Z7 l& p+ p
ask turtles [
. `- Z9 S' W: u+ A$ u3 \ right random 360# U; J3 l K) o( ^! r
forward 1
# s& p3 O( l; s- d$ S1 V/ i$ N set energy energy - 1# G0 ?% ^) B$ }1 z2 d8 u
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end
& j% L" X$ r* k% \4 Lto setup-patches K" v4 C3 y A/ s. C
ask patches [ set pcolor green ]( t2 i7 T5 Q; K
end
. E& L6 Z. Q: C. @4 `5 l& Qto setup-turtles4 J9 l; j8 u# D4 {& i9 N6 r
create-turtles 100
4 R6 y' _! a( V9 Z- B" E( K ask turtles [ setxy random-xcor random-ycor ]/ }: _( \" w7 U; E( S
end
, ~4 A% z E) y4 uto eat-grass9 S* T" q! z5 F
ask turtles [/ l& u, F1 c3 P. J3 A R
if pcolor = green [4 k; g% N" H) y3 a
set pcolor black5 S8 S" H5 |5 Y9 ]2 G
set energy (energy + 10)5 W+ W3 f* Z8 s9 X
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ifelse show-energy?: S- M- j8 f2 L' @! Y2 z
[ set label energy ]4 Z9 ^( n5 o' I, L5 ?% o
[ set label "" ]
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end
' Q. X K- e9 ]' bto reproduce
0 C; j5 G: W+ x0 t ask turtles [9 u/ u$ {1 b5 t9 N7 T& N
if energy > 50 [
1 b/ e6 E1 E; |, C9 B set energy energy - 50
- S: c- l- R2 {0 P hatch 1 [ set energy 50 ]
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]
1 _ V7 k( p0 o' m) X7 h( Oend! V9 z5 N K- j- m" O
to check-death/ v1 i9 e" s, x
ask turtles [; e5 }- n% O. o
if energy <= 0 [ die ]" A1 f6 q/ b* }& g2 u
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end5 V6 b8 Z' N. y7 e/ u
to regrow-grass
4 i3 G; B( ^" o, q4 c' }* I ask patches [
9 }+ m: i( _0 s2 Z, E8 w if random 100 < 3 [ set pcolor green ] O) m4 P. x. @: X# r, H9 e- ]
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end
3 K2 U. ^4 }# e3 {0 sto do-plots5 C/ f# t% q- d1 h. V! p# s
set-current-plot "Totals". }8 L- s( G# a4 W
set-current-plot-pen "turtles"
+ Y4 X$ z% }0 V9 t; c/ [ plot count turtles+ X2 B- [- [ T- X3 S Z
set-current-plot-pen "grass"
" \/ t; D2 H& B9 \( P( e plot count patches with [pcolor = green]
+ }" k3 C5 t! G& s- hend
. i' C L# t I/ I. M% ^. E8 H7 T可是运行时提示no such plot: "Totals"8 m; V! O0 {" I% a* K% k5 r* v
error while observer running SET-CURRENT-PLOT
- c1 r. N' f/ J4 m7 z+ d called by procedure DO-PLOTS- v' f4 i/ ~+ B7 c7 ?" x, X
called by procedure SETUP
, K Q$ o; W6 X7 f$ F4 k \ called by 按钮 'setup'+ G. p9 j0 N F% i
求大神解答啊 |