我编的程序如下turtles-own [energy]
. E+ |0 ^( X4 [to setup
+ d! {. b/ T; r clear-all$ Z6 g9 @" m9 T6 l( y) j# @' V9 ~" M
setup-patches- b7 x2 ]7 s4 ^/ c
create-turtles 100+ i& r, N5 s8 ~# ~( R; {9 C
do-plots
5 O8 R0 u5 _( \ G+ e' c ask turtles [ setxy random-xcor random-ycor ]
( ~, o% M" P! ]' T3 _% M* bend
4 b- i' o2 R' n# a/ b/ g3 Yto go
$ Q; m, I. g1 p move-turtles4 x5 s$ f/ x* ?- w( O$ C
eat-grass
& Z5 n. G7 H" Y1 K" w reproduce" M4 t7 f y; B0 p- o
check-death6 K; Y6 J: \1 g G( j6 \* A
regrow-grass' b b2 q, A' ?4 f/ X
do-plots4 U3 z3 _) V$ X
end7 f( P- {" o3 T) _8 {
to move-turtles
2 [% Y) t! x+ T P" v0 ` ask turtles [
1 l' Q0 J8 ?. e9 {, R3 q2 u7 I right random 360
2 _/ U4 Z: R8 x' }; ` forward 14 A' Z5 O& i. k; B7 M
set energy energy - 1
; r1 i3 D" W- z8 ?# o) C; Z ]+ m7 Q# W/ m) G
end! o2 B' F6 Q7 n
to setup-patches% u( t2 a# U. W9 T" v" q B8 F" p
ask patches [ set pcolor green ]8 L% z2 k$ N6 p
end
7 t$ P% s" ^9 g4 w0 Cto setup-turtles
, D5 R9 T5 L6 V8 E& ~ create-turtles 100
1 g) }5 v, h& b5 ] ask turtles [ setxy random-xcor random-ycor ]
. p' ]4 N3 L! _" X* E% n& Iend! ~, |7 v! r& @- z- n
to eat-grass
# l" i1 ^% ~( \. e0 C ask turtles [
! `0 ^- F7 Z4 _& d9 G8 A5 c if pcolor = green [" T1 h0 V ^+ I" I
set pcolor black
1 R* Y) N& @* ^5 `" o s set energy (energy + 10) ~* L' U2 H. T6 c0 `& \
]# j) s0 K7 T, \: F/ T: b2 ?4 o
ifelse show-energy?
8 w$ Z* f! T: o( z7 g$ j) B3 M [ set label energy ]/ N+ P% m% K8 L" D3 E" P
[ set label "" ]
9 m- r: g5 }- h7 r+ A- ?/ W ]
- |3 c$ D. P c% T1 n( Y7 gend
& Q3 N, h1 E. T9 w$ }( C+ P Rto reproduce$ E$ ~& K" Y. I
ask turtles [
& B6 n9 B4 r7 e! j2 l' d1 B if energy > 50 [5 R0 B) @" y- _! N( K
set energy energy - 50! h5 U5 k4 O9 B7 d$ O, M9 |
hatch 1 [ set energy 50 ]
* N4 P4 _" c# g! p; ^ ]
$ s* E3 X, v W; X$ x8 Y, G0 ^6 r ]
' G: i2 O4 S3 Send, D: X, E1 \6 M% F& ~! s
to check-death$ k- F/ k( b4 T- y$ Y# v% ?. ]
ask turtles [
8 {6 E7 M7 V) ^7 r, M* q) P0 z) z if energy <= 0 [ die ]
! ^5 _5 _+ N- p; ~7 g6 u ]
5 U* }7 {! _6 q% t0 aend
; M4 h9 L0 H' [; wto regrow-grass/ V% E9 k. n1 O- b7 b! t
ask patches [
/ J! R: `8 t/ \8 x6 g; \ if random 100 < 3 [ set pcolor green ]
8 O! N3 i* ?! F/ v" P ]
$ g$ f6 m: \. B7 `end8 M+ ?+ M4 [ y' b
to do-plots7 q v5 k7 I0 m8 d7 b' W0 o* N
set-current-plot "Totals"5 J# p& ~0 b, c/ `7 {
set-current-plot-pen "turtles"& o4 Z) m( c' b+ s! d
plot count turtles* e$ L; m4 h2 w9 G7 k; C
set-current-plot-pen "grass"
! R- }' [6 ?! | plot count patches with [pcolor = green]! ~/ i1 T8 t) e2 |0 [
end9 L6 R% s: P! s6 D
可是运行时提示no such plot: "Totals"
# n7 r! ?) N% `: d- x% J( _8 c, Werror while observer running SET-CURRENT-PLOT* v( F: k. D3 |. a. D. K3 c
called by procedure DO-PLOTS
9 ]# ~/ f1 V* j; Z) g; r2 H called by procedure SETUP
* @2 R9 }; a( U; s) b4 r- H called by 按钮 'setup'
! ^4 B% Z+ \# ]/ q( M; C求大神解答啊 |