我编的程序如下turtles-own [energy]
8 w/ a5 n5 B8 O2 ?4 bto setup: x) P: e- l4 F6 r
clear-all: h& E$ ?, ]$ e4 M$ O
setup-patches
: o* g9 S1 _7 g) R9 b3 i( ` create-turtles 100* q7 @$ c6 z# C: c, ~
do-plots
1 d# p. m' @! W7 |8 `" R% C ask turtles [ setxy random-xcor random-ycor ]! K, ?7 e2 g% A0 f9 `" K$ |
end
& t5 J# J1 @, e9 u/ ?to go
# h$ K7 q: x) J3 q2 c+ ` move-turtles! @+ ?( g7 a: N3 s! M g
eat-grass1 H5 P1 f% j0 l
reproduce. K8 T$ B& |$ N$ P* d S7 O6 _
check-death
+ h) W$ q# p } regrow-grass
@! P6 Z9 h" M8 W) h do-plots* H* w- K' s( X" p
end
6 l, q7 g+ ]% Y- S, E5 Jto move-turtles
, v5 |: L1 Q% X, _6 T. r- S" y ask turtles [
- U7 ?) t% K2 [4 N8 c& ?! T+ l" \ right random 360
' x: m0 n- a8 l0 |# l9 l/ s9 h; y) X forward 1: s8 \/ F+ r4 A, z2 Z% X- ]
set energy energy - 1) ]$ [% F* @* l. f( W# _( g
]
: Y5 `& k J! V3 @& c: W: `end9 y8 o& P9 i* T2 Q5 ~
to setup-patches" D' N) D0 E* S0 \
ask patches [ set pcolor green ]
( ^- r8 E y# Q7 y6 Fend+ f2 t) \+ {+ _) G/ s
to setup-turtles
6 v* M! i% [+ z% g create-turtles 100
) ^, _: d- @( r0 a1 t+ l+ v r; W ask turtles [ setxy random-xcor random-ycor ]7 U$ A0 _3 T( a# Z. ~( }
end
+ S. B5 X) V) _( J0 R8 @( Jto eat-grass
2 \& I% r& h/ E* L; v ask turtles [
9 p" G; S! ?9 a: F0 {9 j2 F if pcolor = green [! N# b$ P) R6 R5 C$ Q) b6 w
set pcolor black
4 E J2 o3 ~' |. u4 E& a set energy (energy + 10)
5 ?7 u: J2 C, o+ K ], d8 l" ]1 h5 i; ~$ R! d
ifelse show-energy?0 _& n) ]$ L# p7 S7 d
[ set label energy ]
) P7 w/ \. R! j/ \0 ` [ set label "" ]
r1 R& ] s" m/ u9 q% O; _ ]
) _: f, ~# }6 q" M; k5 F: f Wend
* A5 f" u2 v8 i$ Kto reproduce
4 C: ]. v8 I: t4 L/ `4 @1 } ask turtles [
+ y s# E- p' f if energy > 50 [
+ v: L( t3 {1 K3 T set energy energy - 50
$ }; W8 s2 U. j hatch 1 [ set energy 50 ]
" o8 f, e; i" u; ~ } ]
& _3 a7 C4 f1 T- g2 J ]
3 K F' s5 B; u# q" J Aend. E! _6 |" T. b/ K) X
to check-death5 J9 X4 J4 A( ^; F
ask turtles [
1 |$ }! t. [; B3 m if energy <= 0 [ die ]' ?! |6 U! j* Y- ~, J2 d; t2 S% o
]0 d) J5 x% Z! X& U2 z
end) m' n1 ` J5 ~- P: l& U* I
to regrow-grass0 U6 F7 |0 g" j9 Z$ ~ m) x% \' E
ask patches [
8 e' u9 `! ~8 @7 z1 E6 O if random 100 < 3 [ set pcolor green ]
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; y4 c" a$ h% cend; M) v5 W* e( z8 {) K
to do-plots* G+ Y f; C; e* v
set-current-plot "Totals"/ G' {% h! p: m5 s8 ^5 ^9 O
set-current-plot-pen "turtles"
8 ^0 a' Q! t+ i1 [2 `8 |# i plot count turtles! {8 T6 x4 E( q
set-current-plot-pen "grass"- r( J& V0 e$ w2 X- U# u7 i' I8 v3 w
plot count patches with [pcolor = green]
. d+ y2 t( r/ f& C: L4 Rend
8 [) C5 I* p# C1 x; u1 {可是运行时提示no such plot: "Totals"5 R# [; w M, E$ z2 X1 ^
error while observer running SET-CURRENT-PLOT* L9 B; Y% o! L$ o8 x$ l, h6 N- w
called by procedure DO-PLOTS) g. F4 n9 ~# F d4 `! Y0 a
called by procedure SETUP
% k: i+ m' y) h `4 w called by 按钮 'setup'* ]# w. @% A$ D
求大神解答啊 |