我编的程序如下turtles-own [energy]- t1 Y- ?, q+ Y
to setup! e8 [& Q* ^/ P) Y O& [2 s
clear-all: I$ A+ i0 G- E1 d r a
setup-patches F7 q P( s: p2 |2 [, t; ]/ i
create-turtles 1006 Z# p: V* j% v3 b$ Y, [( ?
do-plots& b/ I2 V$ y7 S. _ e* W
ask turtles [ setxy random-xcor random-ycor ]
! m2 `' E, E. q$ bend
, z+ Y5 B2 j, d1 d$ T4 rto go
- P9 l7 o+ u, I- S. | move-turtles
- n! K; R/ B. p, V eat-grass; x6 {) O$ x6 i
reproduce- [- a1 s5 z0 Q' t% \, q
check-death5 h/ U' K2 o' C" R* ?
regrow-grass7 b/ n0 r4 B9 I. @
do-plots
* M7 q! |3 E0 E- C" cend0 {+ p2 J# |# y+ q4 `+ v5 V
to move-turtles
* Y# ~- ^+ V& ^# P0 j$ a; A ask turtles [
/ _8 ]) x" d# `5 T' ~" Y right random 360
+ R4 G4 N9 H. V3 ^, f- y9 m) ] forward 1; v* o. C4 V4 k4 D2 @! W6 @$ F
set energy energy - 15 C6 n) Z$ R q: @5 k0 J5 S
]
, ]/ S/ N6 X. V6 q' ^( `end. i3 b+ w8 G/ j4 V- i( Z. G1 C
to setup-patches
\9 F7 y, l, q, J ask patches [ set pcolor green ]
1 q- [, L. c' x5 Y, Pend2 x7 v6 x9 C5 J2 B* `+ h
to setup-turtles' h' B$ b: M% U8 `) | Z' e3 n
create-turtles 100* e; m" F' w+ e5 d+ R/ k
ask turtles [ setxy random-xcor random-ycor ]
! }' L ^/ v- U2 i6 o( m+ ~end
7 i$ h' p" r, Kto eat-grass
, q& T: ]0 Y+ ?# A ]" @ ask turtles [2 } v" x9 V2 d! E& ?4 z" U
if pcolor = green [
& ^+ y+ U9 W3 |) x5 C set pcolor black% l& q% S- f& X7 _* G+ N
set energy (energy + 10)8 n' R9 t3 m/ [. R
]( \9 X% b& w6 F9 N
ifelse show-energy?
. m/ K9 a9 Z1 E5 V4 I* L/ V [ set label energy ]
9 R6 h' e* T- ]; C ^; j [ set label "" ]
( z |+ }, z* K ]
, Q- y6 X Q( S/ p! L) A% \end
* u* X8 z* z: L7 Q. j, t! ?2 Xto reproduce
& {2 l. H" z" U; M( E1 B% T1 z" z! c ask turtles [
) ?7 J$ g% K, @! U2 U2 X, X W if energy > 50 [9 Q; j$ i% J0 [( z
set energy energy - 50
, R; y% g/ L3 ~" w hatch 1 [ set energy 50 ]3 s0 J3 L: z! [
]
# z) k/ U$ ?8 L" M" |9 L ]
1 C" R6 l9 k# p! p1 v' H send) L6 Z3 s0 [1 H. c9 G$ T6 I
to check-death2 }, p& n$ U6 p/ ~! ^- o7 v2 |
ask turtles [
" r3 e* A- O( ?6 h% G/ A. T' {) I2 K if energy <= 0 [ die ] }8 n) Y8 j" R% F7 E4 ^+ S
]
0 ~9 B/ r7 H: H; }* E' E! e! Jend5 ?( [8 R4 h3 \3 I! v7 R- E
to regrow-grass. W% a3 S: M. O
ask patches [
5 \( W3 ]( U- g% M2 J/ G' z3 R if random 100 < 3 [ set pcolor green ]
! g) @# @1 f/ K$ p0 s ]9 e4 \7 Z% q! K4 ^, o, P2 T
end
I% L/ k; C+ Y$ _) s3 mto do-plots
% |) D0 X- L! p% A! \& e6 p set-current-plot "Totals"
$ @' J0 y5 e9 L$ n set-current-plot-pen "turtles"
- c; h: I) S2 A5 X' U plot count turtles. m& e- t' F. `0 _ G
set-current-plot-pen "grass"
4 F5 Z6 ~ n7 ?7 w plot count patches with [pcolor = green]6 j7 ^% O0 c) E" R
end {% ^1 [8 x5 f5 _/ `; ~
可是运行时提示no such plot: "Totals"
' }% o2 ^, A& A6 \# J* kerror while observer running SET-CURRENT-PLOT
: j. G m3 D7 ^' r" c: m called by procedure DO-PLOTS* e. M+ s: `) x; t0 c5 }9 M Y
called by procedure SETUP
0 |9 B3 T! y( P$ b4 `+ ^/ I+ f, o1 G called by 按钮 'setup'
" h! H& w& \% D3 } j' F. \求大神解答啊 |