我编的程序如下turtles-own [energy]
% H( F9 o5 ]2 n B/ j& T" B* C: F* jto setup
* s2 W; a8 T x; x clear-all8 ^* `) _/ I- k$ u* h5 Q
setup-patches5 g- a) }( o6 v4 U( a) S) K8 d
create-turtles 100! v( i! K) T# p) u2 T3 H$ ^* P( ]4 o
do-plots
, A' m; M5 ^+ t: ]4 K0 \0 d# h; {4 \ ask turtles [ setxy random-xcor random-ycor ]6 M" o+ Z# h, C5 z0 M6 s
end
1 Q3 e( m: C& T9 v& fto go
- M# c: Z; {+ l move-turtles# f) y' L ]8 C$ C, W: a7 C
eat-grass2 X6 {# ]1 ]1 w, ^7 K0 B m: l
reproduce
* Y- [7 a# G2 l" t" B7 k check-death0 N# J9 P6 M9 N4 m- n: {* m
regrow-grass
, g: }, \" W; P1 A" c& ` do-plots( N8 t) f4 H, y
end/ G% |3 I' e9 i" r9 r$ q! u n5 p
to move-turtles
4 j9 ]& M1 m; \9 ^1 D ask turtles [0 T' M y4 l" D( v# o6 [
right random 360
`) h- P# t0 e! K3 w3 n, l forward 1
$ H4 X3 Z. A6 R set energy energy - 1& B- a0 c: R; v$ y; t
]
7 j/ [0 z6 c6 S1 Jend( E6 ?" I9 H! J- ^1 ^
to setup-patches8 ?. Z/ W# l) e2 d
ask patches [ set pcolor green ]( q3 k4 ?/ K- Z, `$ ^
end# X: ?6 S) F# L2 w2 E
to setup-turtles+ D+ S9 D) }, {1 G- w$ h" x% a; A
create-turtles 100
2 L4 N" \' j7 {' N$ _ ask turtles [ setxy random-xcor random-ycor ]5 j" J, ^! F4 ~# f
end$ ?) F) l3 y. m" g) ~7 u5 r3 ~( w
to eat-grass: T6 f' d& }9 U# \3 R. w/ h( S; U" K
ask turtles [
& l2 V3 C$ \: A5 ]$ C; x. H7 W7 Q% J if pcolor = green [& A$ ~3 f' B9 N' h% [
set pcolor black( E( ~+ A8 Y! X' M/ d" o' P! T- a
set energy (energy + 10)
: ?+ H9 x; P" D ]
0 e- q5 A+ f0 m! |! f ifelse show-energy?
, K, M* ?% K' P6 j2 }7 [ [ set label energy ]3 h, K* E) e2 U* g% F7 L
[ set label "" ]
2 ]) Z; ?+ p- a B( Z4 u ]
8 B; L* M' D% @- Pend: q7 f. j W2 X3 p+ T( i% E- R! O
to reproduce( ?5 O; _: M9 l! o4 ?4 c
ask turtles [
8 r+ \ i# |6 m( H* z+ ]1 j" ?) _ if energy > 50 [
3 q7 v, h+ \9 K# O; z set energy energy - 50" I- Y8 J+ p. r2 h( t+ ^
hatch 1 [ set energy 50 ]5 O S: @/ B7 _
]
4 }( m$ V" W0 x! V7 S5 u ]
+ X6 C3 S5 Z" d1 r/ _4 Kend
+ _6 p7 U2 [* `9 Bto check-death
' _" d5 i! B8 O0 _ ask turtles [
2 o; y7 q& Y/ \; O( y, C if energy <= 0 [ die ]
9 G% \& Z5 k) } ]
1 g& t: P9 d( I3 B- h+ f hend: P! O* z- o; ^8 V
to regrow-grass R. J0 w( d3 O, O5 ~
ask patches [
5 [1 j; Q% O6 S: A2 ^ if random 100 < 3 [ set pcolor green ]
' ]+ c2 m1 }- u- O8 C ] l- c5 x5 o) E# Q* v
end
; K) K& N8 y" m0 o8 |# ?+ sto do-plots+ ~/ T1 b* Y- C
set-current-plot "Totals"; [$ c* @( g N/ y
set-current-plot-pen "turtles"
* {% v' P2 ~! H" m2 N: Y plot count turtles& X2 B0 I: K. e* L2 y# r1 o
set-current-plot-pen "grass"6 h7 q/ W& s$ R8 D$ \
plot count patches with [pcolor = green]
7 x* ~ I: y& Q$ s, y* }end
7 m6 G2 B: o4 |8 d可是运行时提示no such plot: "Totals"* [/ C) b! p, q, D# r
error while observer running SET-CURRENT-PLOT
3 L M/ x4 [+ b/ m& c$ f called by procedure DO-PLOTS! s8 _. ]8 L$ ]. m) i# X
called by procedure SETUP0 I6 C, L1 W! n9 S0 Q$ q% @) E4 B5 \
called by 按钮 'setup'
2 b T" a; w) W求大神解答啊 |