我编的程序如下turtles-own [energy], t+ y% t8 x0 `
to setup& J' ?6 o) }( G4 b2 K
clear-all
; ~% ~0 d, d- O0 n& H setup-patches% ^+ X7 g3 `+ w- v; B7 f/ Y) j
create-turtles 100
) ^7 k$ s& ^8 A5 Z+ T7 _ do-plots) K+ h+ i/ ~) B; B( B8 \
ask turtles [ setxy random-xcor random-ycor ]$ G2 B8 U) E/ S. j! b, H
end
3 c- i& K" K9 B" f; hto go1 ~1 m! X, p$ H/ K
move-turtles, p* z, b; ]: P; ^* \0 h, B+ J9 i
eat-grass
7 \8 E% T ^+ ~2 [0 Q8 L1 e0 i reproduce% l( G, A( m6 |& ~8 a- P
check-death
' n5 f3 V5 ^: o- n regrow-grass8 F, p! o; v% S4 B* P t5 ]
do-plots8 f5 f/ l6 Z6 t+ h& Z: P
end% c W& A* z1 Q4 J9 F/ Y
to move-turtles
! {2 i$ e+ K9 r- w9 ~ ask turtles [
/ [5 b! `; Z4 M9 v9 {9 } right random 3604 T; |$ M4 g' _6 R& s# f' O
forward 1
6 v6 O, {- B8 j3 k4 L set energy energy - 1
" m. m) S& y$ l- j' a' I ]/ Y1 m- y4 T/ ]7 _/ E! [; o
end9 P' u6 z( j- a x& y) [. ?
to setup-patches
3 v% g6 C" y5 V/ k6 y' a ask patches [ set pcolor green ]
! z( w9 D. q; K( F# nend, _ y. S* C/ D9 O2 W5 h
to setup-turtles+ @! p) K) n1 I" W5 G
create-turtles 1003 E0 O- ~4 g) k: y2 Y2 @: a$ t
ask turtles [ setxy random-xcor random-ycor ]
7 ~6 P/ _1 e: S4 L) G7 l1 W( mend
@- X* K/ H0 }" i) D; Bto eat-grass+ Q1 j/ u" U! z9 O$ R% M
ask turtles [
+ A$ P4 V3 \* Z, t% k$ Z9 b if pcolor = green [
" C! O* b" k& q; A# i set pcolor black
! V; ^. _ ]! r8 G f1 \ set energy (energy + 10)
# ?) p7 Q. P$ A4 n ]
8 E+ P5 l* W- U$ o' _& K ifelse show-energy?4 h! f+ ?2 b5 O/ i8 d( b( u
[ set label energy ]* T* c- R+ w3 E+ | H. w1 i
[ set label "" ]
, E% y' r& o) c2 j ]
2 |1 c4 R9 Y3 `end
% a' s2 Z& J. j+ W' K/ b( _( Wto reproduce2 }/ A* T/ H6 h4 f
ask turtles [3 a+ R% d+ _: J0 q6 \8 ~
if energy > 50 [/ ]4 ?+ M8 p, [* _
set energy energy - 50) O# H& a( H- e( z" |
hatch 1 [ set energy 50 ]
& k3 p$ E" e. w ]
9 y2 ]3 R& L2 d. h( O4 t2 s ]
% f' F. M$ H7 g) F3 d/ F: vend
" Z& N5 y$ y9 ?9 K4 r, g x1 H3 y6 Hto check-death( B4 `' r1 D; S. e
ask turtles [
, Q' U L& E$ V+ O* L- N: V9 A- t if energy <= 0 [ die ]
3 O$ a4 h% [4 d4 l* F ]
8 V6 G+ E7 I1 J' H; z% Dend8 Z' H4 e" o* l* b
to regrow-grass
" e+ H8 z( _. o1 u4 L, B! D0 i ask patches [
T1 n8 ^# I! @- j if random 100 < 3 [ set pcolor green ]7 h6 |2 V% R; S Q! _
]/ g* |- ?& Z* P5 l$ A7 T
end
5 x( Q0 q6 _2 }/ k: Sto do-plots7 D N, [$ O# X3 H3 n: P
set-current-plot "Totals"$ Z3 |0 n l! E( x& f* k) ?
set-current-plot-pen "turtles"
7 z3 J+ O/ H& o* `) K plot count turtles
2 d8 Q: I* D% V set-current-plot-pen "grass"
4 e: b/ z" M0 j) m) P plot count patches with [pcolor = green]
( \% L* n0 E3 y, hend. b% }0 x3 C+ K. p s
可是运行时提示no such plot: "Totals"7 K9 p& [7 T$ u8 _' ^5 w+ n) m! Q
error while observer running SET-CURRENT-PLOT4 d( G. X) G# t7 K
called by procedure DO-PLOTS% L% i( p+ h4 O: o6 @8 V
called by procedure SETUP: c* \/ @" _3 t) B% ~4 U5 k
called by 按钮 'setup'6 B" v0 A6 }2 C1 k* a
求大神解答啊 |