我编的程序如下turtles-own [energy]
9 ]" X& a+ H9 J7 X$ g8 e/ Ato setup
J0 x2 H( s) I: \" W' ]/ @ clear-all8 ~0 q: \) _/ h2 ?
setup-patches
0 g! Q! ^" d2 X- ]2 R/ g create-turtles 100
' y# e( Z4 _3 O& q9 K do-plots7 |* C: M( m1 a7 E
ask turtles [ setxy random-xcor random-ycor ]- m; L; V1 v: T
end7 H- u. a% v+ h0 h
to go6 ?' P7 y& @- `( m7 W0 S
move-turtles5 f0 j" h( o3 n
eat-grass
( X0 m6 j7 y+ o: ` reproduce
8 l6 S2 X' k3 A w6 ~" p check-death
5 f, Z2 V2 W* g. l# W% R; M regrow-grass: o( i. P$ @9 R. f# U0 c A' E' Q. {! i
do-plots2 J5 ^* O. G, E9 Z6 h U; X+ F1 ?
end
9 ^# A T) \8 Q0 F9 f' T* fto move-turtles/ Y5 P1 ^7 G, u/ I: M6 V8 S8 a2 f
ask turtles [
# u4 ]% T4 I8 G2 ~, \ right random 3601 q7 D( H$ |* t
forward 1
8 Q8 ~8 j7 {- t i set energy energy - 1
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end
, {" e: J, j" V9 a8 ~; ~to setup-patches
( `) N. R4 t' m9 y1 @: H: o, B ask patches [ set pcolor green ]+ w8 s4 ^+ M, M$ G! s
end
% k+ B# [0 |/ A* nto setup-turtles
: }0 j' {$ M$ V6 G c" C. I create-turtles 100
1 F7 c2 U( U! `6 C. u3 k2 X/ v ask turtles [ setxy random-xcor random-ycor ]
- w1 d( U; {; x9 J$ M: }end6 I4 B+ S5 Z- M6 w
to eat-grass
, ~1 {9 @. \4 J+ d ask turtles [5 W& S$ `; U* q( e* w+ q* b9 N
if pcolor = green [; h; ]# p* v3 L, A3 {( z
set pcolor black$ g7 j1 H' Z; r- w
set energy (energy + 10), ?* G& h- f) d, U8 a$ i
]
' H6 I/ S' V9 }1 W/ D7 }2 P ifelse show-energy? d- a5 b V4 a. ]' n
[ set label energy ]6 W+ a* I+ ~+ @, x, g
[ set label "" ]
$ M7 N; Z m5 i. o ]
2 r- e; r( l0 S+ ], W9 o# Kend
8 x2 _7 t# W# q4 h% ^# F0 u& r2 oto reproduce8 Z$ S2 j9 W7 N% A8 w! M* `
ask turtles [2 O% U: e& [' P4 y% r9 A
if energy > 50 [8 a) k. j2 M Z- w) r* L: E
set energy energy - 50
- ]$ p0 ^0 W+ ]& x. b/ H4 L3 h hatch 1 [ set energy 50 ]% ^$ g, G* e% C% m3 G; @) i
]0 P8 a) @, M- c S6 O& ]: h
]
/ c5 j, V$ t( O& P' m% f" S% Dend
9 r/ v( N, D1 M0 `/ e1 D' hto check-death+ I3 f8 @. c- m' |. |$ z
ask turtles [
; R: y) u8 ?# D3 f- y if energy <= 0 [ die ]; S) f, `5 ^" x8 `7 k' v1 j. {6 @
]5 ~" V* A* G) W( M |( @. {/ {
end7 x, L1 t) P# U* ^ W9 f _
to regrow-grass% D! m. s: Y) a/ s, u6 u
ask patches [
0 ]' N1 m: v% }. |* n if random 100 < 3 [ set pcolor green ]: H& k- F: E9 K
]
! Z5 m1 C+ ~$ ?$ Nend
+ y7 e4 N6 a6 w: ito do-plots
9 X5 J' G G% Z) I set-current-plot "Totals"$ ~! q: S( z/ W9 F7 _( s9 r4 @- F
set-current-plot-pen "turtles"
& K/ @- ]5 m0 U0 C5 J/ D# p plot count turtles
. w9 N/ @0 C/ O set-current-plot-pen "grass" q$ L; U, e2 w% E( }. S" [0 c9 q
plot count patches with [pcolor = green]
, o! W1 ~9 Q" A: Iend( z( K" h4 N1 c$ M( B
可是运行时提示no such plot: "Totals"
0 T3 B/ a9 T/ a# x+ e" r+ ierror while observer running SET-CURRENT-PLOT
1 ^4 P1 I( ?7 b called by procedure DO-PLOTS
* S9 H: A- P7 F) d, B# ? called by procedure SETUP
, ~! D' T% x: x( D' \ Y called by 按钮 'setup', ~1 K$ H( B. `1 N
求大神解答啊 |