我编的程序如下turtles-own [energy]
5 j5 S, q3 O4 D0 F: V0 Zto setup
% [" G# V Y& U! E3 N- Q' @4 ] clear-all/ k t: T) I- U3 \: l- v7 f
setup-patches! _4 K: r% ?9 w! D
create-turtles 100
& D7 M/ W% p3 B4 ? do-plots
8 W! d# O$ g' o7 B" |% W1 t# r ask turtles [ setxy random-xcor random-ycor ]
0 `1 i$ ^+ b# U4 z+ K. q; s) r }end" p8 W+ ~) n. j7 ? U$ k
to go2 u2 B0 F3 C# \4 T
move-turtles
P% G3 j3 s) P! c# ` eat-grass
9 Z9 Q+ q7 S2 f8 v reproduce
/ e. N/ `6 \6 n8 u/ R; }& {6 x, x check-death3 |* F! a: A" Y4 N& L, }* H& ?
regrow-grass
0 h; o6 ~ T' O+ ?+ ? do-plots6 m* T: y7 t4 Z) _1 w6 Q
end, n" x5 t. q) i9 f* V1 w
to move-turtles
$ S7 @. f" E; ^' m1 P! M8 \. E ask turtles [. Q& N K1 H ]) a$ E% Q& C
right random 3605 G( U% E$ K( A" ^& o5 y* _
forward 15 }5 d+ X& T( N# R8 H5 X6 ~7 I# f
set energy energy - 1
/ p& |% g& b R8 X2 ~, n! i: z ]
$ h2 l) W7 }# n5 `end
- f0 h6 h/ I. i4 G0 _+ {to setup-patches$ D: q3 `; `: j" f! U
ask patches [ set pcolor green ]3 X% w7 ]1 o7 k" o2 T
end
: i. Z9 [* a0 ~& g9 w* w3 jto setup-turtles$ {2 q! c% A; S0 H% b: R( F: |
create-turtles 100; b0 ?: d2 K; f+ F+ ?
ask turtles [ setxy random-xcor random-ycor ]
9 U/ M' ~, R/ ~+ c3 fend" w" B9 i% @1 ]8 F7 g# \2 K
to eat-grass) L0 u: I4 L* }$ z. f& W: e& S
ask turtles [, k% H& }& R: `5 q9 D) @( n
if pcolor = green [1 ]; Y5 _" _ c3 c0 `: ^* `$ `
set pcolor black! U2 b4 i# R+ t( T5 s
set energy (energy + 10) d5 [+ ~$ W: N4 q
]
6 F5 G0 `4 E8 t- V ifelse show-energy?
% ~( U% `4 i+ p) ? [ set label energy ]9 v T* ?* P3 @" G
[ set label "" ]
0 z* J3 N! {( T0 \) ] ]0 i4 Y3 l! ]3 T/ k. K- j
end
! p L# R' s* I- k& u" gto reproduce" _. r' J$ a( t% m& C) i0 ^1 |! P
ask turtles [
7 V& e' @, A, q% |: b- n6 ` x( X+ L if energy > 50 [
0 g4 O4 ]( C6 j$ R, T/ ?# S9 J set energy energy - 50 l# } o) O$ I
hatch 1 [ set energy 50 ]
; `, X: l2 p1 y D! h ]
2 v+ m4 [# J3 }$ k, w ]
3 W q) I5 j6 }' o pend* J' Z+ Y0 D" m2 ]% X/ ^/ S; T$ L
to check-death
7 @: ^5 [4 V- R* c ask turtles [
\7 Z# C( ^8 Y5 x* q* ]% }# c' x9 D% ? if energy <= 0 [ die ]
! d" q# y' Y0 M* z; \1 Z- B ]
0 J( Y6 y: z; ~6 Hend
6 r! @# j6 T/ J9 Ito regrow-grass
4 R% ~ d, x5 M1 }( p ask patches [* z u! |6 h; D$ O! x
if random 100 < 3 [ set pcolor green ]* b! W4 H3 G" p r
]
, F( B8 m3 o* B6 P* b* E' P% bend( Y5 V3 G* I! T1 m4 o' H
to do-plots A4 h! D) [. B! E% f
set-current-plot "Totals"9 D6 r* k _8 w _5 A
set-current-plot-pen "turtles"5 l1 R& _; b# O6 B
plot count turtles
) |8 X! q8 Q- |* I% `( X3 T& P* J set-current-plot-pen "grass", h3 v8 x8 f& _$ G/ w9 }# O
plot count patches with [pcolor = green]
$ n" M( i! H+ Z& Cend
" l6 `8 K! v$ V/ S" P可是运行时提示no such plot: "Totals"& S9 l8 k0 K# w5 b; V2 w0 m9 X
error while observer running SET-CURRENT-PLOT: l. q c/ s$ t$ G# ?& r$ `. r0 C
called by procedure DO-PLOTS3 S+ z: W2 L6 \
called by procedure SETUP. Q7 {$ T. k8 Y+ c* |) m' O# B v3 j
called by 按钮 'setup'- h. y- i& C7 m4 j4 j+ u8 z+ s
求大神解答啊 |