我编的程序如下turtles-own [energy]7 H8 P% ]/ x: Z) M
to setup
. \- `! I+ C7 R3 `; T clear-all' O' I0 ?2 i; A; \- x
setup-patches& ?+ x6 J9 e0 k- h+ s
create-turtles 1004 Z/ W) Y0 {& u
do-plots
# q3 }. ?8 \' Y0 U8 R ask turtles [ setxy random-xcor random-ycor ]( d, E' x8 I7 h$ R: y) w( \
end. ^% d! n# k. k/ E6 Z' ?
to go
" d9 e! c; B* @; x" b8 j move-turtles
/ I) S, w7 Q+ g/ O$ r& f2 ^; N eat-grass
% ^/ U) H9 ]1 T* q7 Z# o$ y& X- g reproduce' _# O- j% ^4 K3 r8 k7 q8 W
check-death
X7 U4 g W% V9 g regrow-grass: g, s8 s3 W+ I1 b) P
do-plots3 p9 A2 ^* n9 @$ z
end$ ~9 b. ^# E" W9 G% i# g
to move-turtles: d) Y4 }) c- o0 q7 X- z7 b
ask turtles [( U2 Q j9 \/ [3 H, [: z
right random 360
7 k# E. W [; j2 v forward 1
. j! U: ?& l- {9 Z5 q set energy energy - 1
9 p3 J: t: s5 z ]
* p4 X# |- |) t& n% z9 O& Kend# ^) v$ M6 n4 ]
to setup-patches
% f0 c/ K1 e {6 \ ask patches [ set pcolor green ], Z( Q7 o6 s# {0 a2 r
end! Z( V5 w3 f! X- \, w: w! H
to setup-turtles
( l3 { \1 ^3 A9 \! [9 h% c% H create-turtles 100
+ @0 l4 ]3 ~4 ^' B- x ask turtles [ setxy random-xcor random-ycor ] u# i, B% ]/ ^3 D3 J0 u& A
end9 i9 H* r3 y7 C: o0 S2 H4 q8 x! t$ F D
to eat-grass4 e% C# e) A& G; _) `
ask turtles [
. J1 a& G8 ^; y if pcolor = green [
: P! ?0 G8 k' @ set pcolor black
g/ d- E& |( a$ Q set energy (energy + 10)
& D# h5 k( S {# _1 @, U ]. A' w- @- f# g5 W3 M, e! A3 K+ e2 K
ifelse show-energy?
) a5 }: T* ^1 H2 M( ^$ T6 ] [ set label energy ]
# n# d' l e1 x( l9 ?# c. J [ set label "" ], q9 x! R/ c. ^9 @, n8 Y2 p
]: Y. ~5 V+ s" \* g
end
4 a; X3 h9 A+ {+ W2 h' t/ Lto reproduce9 \% a' m2 | t. a( w
ask turtles [
. a% e9 f* J; ~3 A& x if energy > 50 [- P7 p0 L% t6 H7 J2 M. V
set energy energy - 50
, f* V1 Q8 E( v' D+ E hatch 1 [ set energy 50 ]
3 ]0 I/ `4 e$ N9 {8 Q ]1 {$ I3 s8 C9 }2 Z ~' M$ L
]2 W4 o) O# G- j' y: O2 v
end7 d# w d5 j# v& Z5 A
to check-death
" g3 `' H5 m- k- u/ a: K ask turtles [
, F+ @; I: R4 e if energy <= 0 [ die ]
9 Z0 K9 c" J8 s6 h9 a( G& t ]
7 Q& _9 n2 |% G5 [! \) K7 w- y: B: Aend
$ X/ R% C! @, D1 E3 b' lto regrow-grass
1 v7 f8 z% Q, q ask patches [
9 B; a) c/ H' V( O$ p5 S" k if random 100 < 3 [ set pcolor green ]
0 \4 w) h6 t. J( ?: X ]
6 i6 Q* `. G# ?4 R. P B7 Jend
B" Z" D |" g3 i$ y9 G+ B; T+ tto do-plots! ^2 L& S! T; N1 | T
set-current-plot "Totals" j$ k% Y. r3 V, ]
set-current-plot-pen "turtles"
* E# a" \+ n6 R5 }" Q6 E9 N2 U( y plot count turtles
' g" [# n! D+ {6 |0 h( D set-current-plot-pen "grass"
) P# `, o0 H3 r" k0 I- B plot count patches with [pcolor = green]
9 [- C- |. f% i; E j2 a' [9 Kend
9 v% u# W' V9 `, q( [+ l3 V+ r可是运行时提示no such plot: "Totals" _: D* Q# g$ T/ d3 [' `
error while observer running SET-CURRENT-PLOT
3 C" o! e/ Z2 M2 P0 V' b called by procedure DO-PLOTS
* v) |" n9 W6 z; x called by procedure SETUP- h$ M$ y5 h$ y0 |" i9 m- i
called by 按钮 'setup'
6 ^4 ~7 P) J( j q% _: \4 S' N. z# n求大神解答啊 |