我编的程序如下turtles-own [energy]% u p. L) \ y8 {) ^
to setup$ ~ r% n8 o/ E$ c1 K1 B. }
clear-all
- S) G, ]0 l! g$ h7 Y setup-patches" V/ A" v2 f( G p
create-turtles 100+ w1 N4 Q, R# U6 g! w
do-plots
4 g6 q$ L: N7 I5 F2 K6 l6 r/ k: X% n ask turtles [ setxy random-xcor random-ycor ]8 Z1 ^: P7 @" Y0 A
end
7 V6 j2 g; a- o# M {8 ?# g* Lto go
, k$ G/ g: e1 f" k. u move-turtles4 p# u/ i$ G, J( N9 y
eat-grass
/ _8 n/ K9 Y" I1 N; C5 i) r reproduce1 M4 a. T( b3 A
check-death
3 v" f: e3 g { regrow-grass8 @7 Q2 c1 f7 A* F& ?
do-plots9 r$ o, {& p8 a j8 g
end' e. h$ \, h, s, P+ H/ R& o) b Z
to move-turtles
; J9 k. Q0 i5 ^7 S ask turtles [
! Y8 `3 D% f2 [, k8 L$ Y0 z* o right random 360
% j: H! n0 s7 i/ b forward 1
) n$ R- k, K% v+ O4 W8 u set energy energy - 1
- _% z3 {% s+ o: I ]8 t0 L2 a: [! o: }" k
end
- ?# k* O0 O' g( l+ ?to setup-patches" g f* L* i) ~1 ^' E$ H2 K/ L2 j$ V
ask patches [ set pcolor green ]& A0 j6 ?7 `, |" o; u
end, ?- i* Z" q& N! I7 A
to setup-turtles
+ H- t0 o$ S% [ create-turtles 1005 M, F1 ^& S) Q9 O
ask turtles [ setxy random-xcor random-ycor ]( J1 V0 Z# H. O. n
end
8 D, R( g O) `3 d% ~to eat-grass' H4 k) m0 v c, q I
ask turtles [$ C1 ~- T6 X8 Y: g% @' u
if pcolor = green [# N7 ~: k" X3 R' }! y
set pcolor black
* ]! z" h' D8 G0 M7 m set energy (energy + 10)
, [- r3 J# l% p& e' b% s2 q ]5 k8 D* }& e! N8 ]
ifelse show-energy?, ~9 @* w( u* J
[ set label energy ]1 o+ t9 r+ m. r9 v. u, J3 _ o0 S
[ set label "" ]
# R" M* {- u% g* e# @; v ]
5 F1 ?8 Z2 {) v* |: A) hend
" z5 |" g; s1 U5 ~/ h5 Xto reproduce
( Z* B1 m' |* v% y4 Y+ j" \ ask turtles [
" _ N* \. s6 t' o) |% F. E$ G if energy > 50 [
3 B5 m9 C0 a' {1 i, w9 F set energy energy - 50
5 Q" Q! h" R7 `; u+ V: h! B hatch 1 [ set energy 50 ]
0 V! f! c U. A/ x/ R5 F7 K ]" C( U6 P$ N' J( {7 I$ [3 d9 |
]
, Y; I0 S7 U$ H7 R; E1 _end
! n4 p% j0 _) L9 X8 a. Ato check-death
0 S0 e5 ^3 e( Q# d5 e& P0 A% J$ n ask turtles [5 A5 m* H3 c, E" M) ^/ a
if energy <= 0 [ die ]
2 u; N; m' p, R) N ]
- T% J/ b( f6 {4 ^4 E3 x0 ^end* s7 I b, {$ c9 X+ M
to regrow-grass
8 c( o* s8 K: v ask patches [
+ h) i! c! @' G' b5 M) _ if random 100 < 3 [ set pcolor green ]0 H3 y# E' R9 B" i) u( P
]9 P0 Z# W4 H0 o4 q) ], s, z
end7 b: x! D. v0 ?% x' J- ^
to do-plots2 Q5 p0 z! M7 _- k( E* S
set-current-plot "Totals"' H/ x: I$ u N) Q
set-current-plot-pen "turtles"& b* w- b* o7 W; g/ G3 V
plot count turtles! w; `# R" |+ G% m4 w0 r
set-current-plot-pen "grass"
# f, i, T1 {- a# h5 g plot count patches with [pcolor = green], x+ v3 R$ E& n# s" \8 f# Y/ R
end
2 `' [* }' B2 `1 Y9 O' f/ R# B可是运行时提示no such plot: "Totals"
# @' `3 \+ X& X' B" J- _' w: [error while observer running SET-CURRENT-PLOT+ y$ r' {0 h! U& m2 d4 ^; g0 _
called by procedure DO-PLOTS
; c V+ @% K" ~8 O* I7 F+ e called by procedure SETUP
9 W! O+ R$ i; l; f% L( L called by 按钮 'setup'
' `' m! t( h H6 P* ?; u" u/ T求大神解答啊 |