我编的程序如下turtles-own [energy]; b, m; V2 W; h" ^' G5 G/ a8 ^; T
to setup; H& c. ^# o9 ]) `9 X
clear-all# O4 O9 d7 i, M+ u9 d' ~' P; o
setup-patches) _/ j( s5 }* N; b7 W
create-turtles 100
1 W7 z; K! ]! B1 r: Y; s3 M* h do-plots' s0 M& i7 \6 l4 ?3 T5 w) ?
ask turtles [ setxy random-xcor random-ycor ]
4 M" f7 y# @- U* rend
. W" j* H7 ~: ~* z; W1 vto go: z9 ^- x" F# s( k3 a( x4 c
move-turtles& ?* J4 _* b4 k; d% L: ^
eat-grass
5 u5 l( @% b3 n; [) n: R" p- Z reproduce% P* B# D5 E" Y8 z+ z k
check-death2 ^8 Z' Z4 V5 s* z6 t0 S
regrow-grass* z, O& G0 M2 Y9 N; b0 Q
do-plots
: @" j0 U3 A+ }# t. e! Mend% M2 J5 w ? e, t/ W$ c
to move-turtles' N# |7 v# U/ w2 T' ?$ M
ask turtles [& Z2 m! c. V- r8 y1 B0 b- V0 L
right random 360
2 _% o& ?" V# V4 o! ] forward 15 F+ B3 W( Y) {" E2 N' L
set energy energy - 1
7 z( j) ]5 G7 T" [9 e ]
. j! a2 y$ [- b. j6 a; p3 Mend
0 x- o q2 o$ Z& ]- Fto setup-patches& E. p! I" W- Z/ Y
ask patches [ set pcolor green ]
6 n* W% V4 o, ~& j5 e# x. gend
; q( o+ o( w4 s, n6 _% B3 d$ Eto setup-turtles% b6 x6 g8 c, ~# V' m
create-turtles 100. ~$ ]4 N! L$ [- f
ask turtles [ setxy random-xcor random-ycor ]
1 t( w: z$ |. D; V6 Bend
0 h* W+ l s* z( G- \; \6 vto eat-grass
4 X0 I# V1 n. J( e ask turtles [
) b3 Y/ A2 A# i* Z if pcolor = green [
( w7 i2 N8 o/ e7 d' ~ set pcolor black
+ J6 r" B1 i0 U0 r/ p3 C0 @+ d set energy (energy + 10)
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$ P% m1 a& y- y: U* r& I) B7 l ifelse show-energy?
2 O8 g. H z, y! U# q2 V [ set label energy ]6 R, h! d! o g& ~, k
[ set label "" ]
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end
9 \# `' T& ?( sto reproduce( `( k8 V1 W5 u8 X e8 p; a$ D
ask turtles [
- v2 f/ G: a2 S& ~( G4 \ if energy > 50 [, `. U0 j/ N# B6 a! X& V+ K6 M' f
set energy energy - 503 _, `. I, L$ }, ?- F% U7 T
hatch 1 [ set energy 50 ]
! q3 h3 n0 S& k- t; s1 k: o% c ]
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5 U: ^7 W, O. J7 iend
) z) P4 M3 {) N& g3 nto check-death- d$ F, x H9 [, \; v4 \4 g
ask turtles [0 _, G5 Z% d! s3 _# G" Z9 x
if energy <= 0 [ die ]
. q2 k' q8 v2 f* b ]
! h; k& E7 `$ r& `end- X2 K% ^% a; H7 U: A9 d6 ?& N
to regrow-grass
& z6 Q6 Z. X k ask patches [
8 G& U0 e0 A+ r5 c; l c if random 100 < 3 [ set pcolor green ]" n3 D" Q2 O$ M0 ^
]7 V2 ~2 @7 I! Z: u, \. p8 Q
end
& Q' u' h3 d: |! Y% hto do-plots
7 Q$ [5 u/ W- V: L9 \1 | set-current-plot "Totals"
1 A+ h0 r5 L1 J3 W) }0 P4 ^ set-current-plot-pen "turtles"
, l2 K( j- F# A! m plot count turtles
* l. E: b3 S! s# L$ l E set-current-plot-pen "grass"
* c* w& x5 n! H plot count patches with [pcolor = green]/ q+ {/ [1 t1 p
end
3 ?$ d: l" p9 b) V可是运行时提示no such plot: "Totals"
& W; i; J4 c( v, h- m- a7 S7 m. q! jerror while observer running SET-CURRENT-PLOT" z& L2 {# {. B2 G; b* I" R t3 s1 `7 E
called by procedure DO-PLOTS
, \+ s" X0 z- k$ W1 L3 O called by procedure SETUP
/ U5 D6 f: J7 v* \ w$ n. Z called by 按钮 'setup'
" X5 X$ D# o3 u0 R. t8 F3 [求大神解答啊 |