我编的程序如下turtles-own [energy]5 H8 C7 m$ [6 ^, Q! K2 v' G
to setup! y- O# E5 t9 l* n6 L+ _$ i2 t
clear-all4 p. x- Q6 W+ t3 i% R, x
setup-patches
! z+ I- J1 v3 y# t5 p' Y: O: v8 U create-turtles 100" U3 |/ b2 w2 v! a7 C
do-plots
C6 y4 F0 g: X6 K3 _& x ask turtles [ setxy random-xcor random-ycor ]
: l# d6 ]0 ]6 V$ Yend
) A6 x( N* R. @, d& a* ]to go
3 W4 A+ H# \( ?& Z% @5 k move-turtles! l3 {5 ]: K* [6 H8 I. T6 J
eat-grass
, _8 I/ j, i. K0 L reproduce
5 ?* s! Q+ t7 v$ d* [8 d: L check-death& B1 e V# ~% {7 y4 ?
regrow-grass" W7 t+ y3 I) u }% Z" J8 k
do-plots* d5 V* l( I" U/ k* W8 A: e6 z
end
2 ^; b7 { ~7 k3 V0 [2 Ito move-turtles# B* {3 z1 Q9 b. w; Y0 D- V6 T8 e
ask turtles [
+ l. R* T2 j4 W2 \6 Y9 m5 H- J right random 360
5 Y- d8 G* a( t5 p: [* b forward 14 D9 P, H3 g# S, _& D$ p
set energy energy - 1
: | O5 @( Y" ^: ^ ]
: q) Y1 V1 r& `+ J! Oend2 ~5 A' W& ]4 N8 x$ J- I
to setup-patches6 [- B) z9 h) a2 [ j
ask patches [ set pcolor green ]
0 f) l$ v2 u/ D5 ?1 a( f7 l; }end8 H. D4 L2 z& i0 \ ]$ u
to setup-turtles
3 g& v5 C- S7 m create-turtles 1006 M/ b9 _5 K3 F: H9 L$ b; _
ask turtles [ setxy random-xcor random-ycor ]1 s+ J+ ?( V$ P8 j8 q% l2 B
end, h+ Z! c% w" v/ h6 {
to eat-grass
% ~$ J0 s8 I* \0 o; v; v7 ~ ask turtles [( ]4 E/ g; N6 y! \
if pcolor = green [' M8 B4 v: D9 R& _* b8 i# w
set pcolor black$ Q7 f4 ~7 ~* o4 ~1 H8 U
set energy (energy + 10)2 e0 [# V7 i; j, q7 {- [+ Y- K
]2 E) w' N8 p- o9 @
ifelse show-energy?
1 D5 j1 x% `3 o [ set label energy ]! v6 W6 m/ S- |
[ set label "" ]
" x0 T4 e$ E" p9 k5 ]3 A ]
. y. s1 [$ q: p$ eend
% o9 ]+ L. W/ h* hto reproduce# B9 |2 H& h( G$ ` f$ v* n
ask turtles [
; V5 W! |% z! Y$ V: r( a- t if energy > 50 [
+ Q, r$ M7 v/ f$ E% r set energy energy - 50% R; A' N( }: Z+ v% r
hatch 1 [ set energy 50 ]
, G# _$ F' t* E4 r7 N1 t+ M ]
/ S0 l0 n, `/ b# J. s' u; z, ^ ]
6 Y9 v: n% `. G! y4 C( e# P4 ?$ Wend
! v- x5 k5 S' x L1 oto check-death
2 S: s) r% @4 m% n7 y9 ~ ask turtles [
5 _% s* s1 O/ A+ Q e if energy <= 0 [ die ]: Q) {; `5 | e- d y
]
2 ^( l: V5 ^& H, O: _end
( e" ^% V! p* \1 T$ ?+ tto regrow-grass: ~3 |8 D- H' C6 b7 N7 t T
ask patches [
1 `# U+ x& D0 f! V' Z: I( J if random 100 < 3 [ set pcolor green ]
0 Q& m8 i+ O% p. h ]9 R* N' g8 M! P! ^, m- I) F3 Q
end% W! A2 n$ ~0 F- W; y
to do-plots
4 K8 V: Q( A; z+ Y, m set-current-plot "Totals"- l/ s( w& j. }+ A: T4 Y
set-current-plot-pen "turtles"
0 G, a3 V+ ]% C+ ~* g! g- S plot count turtles( @! X' Q8 H Q! n. e
set-current-plot-pen "grass"
& G& U |2 H; x plot count patches with [pcolor = green]& c/ ~: m0 a5 ]
end8 M! @. n: R3 W$ j9 {
可是运行时提示no such plot: "Totals"8 i( A$ H) H- W2 s! x
error while observer running SET-CURRENT-PLOT: |% j# N# m( k' b" c. M7 h
called by procedure DO-PLOTS# M7 _* b! v% w8 q8 V
called by procedure SETUP
1 z! J# r. L5 a* G4 W5 H. c called by 按钮 'setup'
; ?- _9 G8 Z1 R! X- A" Y2 E4 {5 i求大神解答啊 |