我编的程序如下turtles-own [energy]
/ B( }5 t, C* _7 \+ y6 m8 \to setup' p3 G8 @9 U; S+ H8 |
clear-all
% g+ b, ?/ n" W setup-patches
) R1 U7 X! I, a, e% q! L+ i0 W create-turtles 100
* f+ t3 t+ T3 Q) f: y do-plots9 x% s6 k9 w6 x4 f* c
ask turtles [ setxy random-xcor random-ycor ]
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to go) M6 {% M! m5 n+ S. O) o+ j
move-turtles
' ?9 e; E) R) R- Z7 _ eat-grass
6 N1 P1 X" f+ P5 Q( {" s( Z reproduce
: e2 L* F' t4 ]; ^7 x2 {% ]- C check-death: T. ?: }$ M% H+ F/ Q$ ?/ Y
regrow-grass* G( E% K: ~( P3 I7 O
do-plots/ T8 H2 M) J- H3 W
end
; I, j) q4 R& S9 J3 w& ato move-turtles& A4 T" v$ f& \
ask turtles [
( ^# M6 Z, }4 ~$ U right random 3608 ~$ P/ V- W6 C4 \
forward 17 x! _+ z1 h* o6 v
set energy energy - 1
) q* N1 K. s/ S8 T# } ]# {( B8 C+ {5 C9 @
end5 a" ?. S+ o" i/ n( ^ w1 F
to setup-patches& P, G3 x }# F% v" z! E
ask patches [ set pcolor green ]
1 Y/ S& z" j3 g7 O: d3 Yend
& \; y9 F2 g q/ |) fto setup-turtles3 ~! F3 Y3 D+ S+ J6 ]7 M5 ^8 b
create-turtles 100
( _4 s3 y# Z3 ^* T$ } ask turtles [ setxy random-xcor random-ycor ]/ p7 o! E: j7 w F- e
end
+ ^1 W7 i9 L' u8 ^to eat-grass* X6 p: W8 n1 s% d
ask turtles [
( W! g) m4 x+ t* r7 s, c* [9 m) S if pcolor = green [9 w7 c: J7 E& I4 W
set pcolor black8 k0 K/ E& E5 e8 e' c
set energy (energy + 10)' j. }2 r- h9 g' f
]
+ p3 D7 F2 o2 K% Q+ V& i1 P ifelse show-energy?: f! j0 j$ ^. U$ [0 W# `
[ set label energy ]
7 O! G! P% V1 G u" E+ t) `' @ [ set label "" ]
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end9 w, u: L( s" `" G) \6 P8 x# X. s2 d
to reproduce4 f- k; g! F3 O: \% R n: i; c7 O
ask turtles [3 D3 |' o8 }3 Q" n; L
if energy > 50 [
" Q4 c! \5 |. P& z! E set energy energy - 502 ?& P7 q" p( C2 ]9 ?
hatch 1 [ set energy 50 ]7 J6 R. t. v2 w2 t$ ^% q
]8 f8 ~4 `5 o ^' O
]
% }& n" P. N ?end
& h% a4 [9 m' u% J: Vto check-death; s1 g+ C% A$ r! \0 f5 c
ask turtles [, J1 h' q4 q; o; N
if energy <= 0 [ die ]
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end/ d; Q$ {1 ]3 ~( R7 n4 Z3 P/ d, w
to regrow-grass! x' [0 o/ R4 G3 \2 C
ask patches [8 ^7 G- `4 x6 k' s; e* H4 v
if random 100 < 3 [ set pcolor green ]
" u- D7 ^& X& y2 Y! X% V1 F ]
7 w0 V' {/ V3 b& n! O1 Wend
9 A' u7 u- a5 I7 _to do-plots R: z$ Y; d3 p5 [- A
set-current-plot "Totals"; W3 l; C$ i( G/ f
set-current-plot-pen "turtles"
5 j' N! [: h# D* O6 t+ q' {: \ plot count turtles" z! l7 G/ j/ R; @. t, P$ @7 h
set-current-plot-pen "grass"
; i! h1 p9 k3 O9 r5 M' h plot count patches with [pcolor = green]
- D! w: d3 u4 O6 Rend
0 \4 f$ h) h5 D% t% F' E可是运行时提示no such plot: "Totals"
D; j* c" s# k; Ferror while observer running SET-CURRENT-PLOT
! f0 \3 P; X- w* q: g( I# w4 v called by procedure DO-PLOTS- Q8 Q: b) D! G4 C- b; Z# r2 A
called by procedure SETUP( |7 q8 `* G& v# _7 C, P8 ^; D
called by 按钮 'setup'
4 D* \5 u! m8 d0 ~9 F8 }# T) @求大神解答啊 |