我编的程序如下turtles-own [energy]9 E6 c3 v# @3 a: {( b
to setup1 B5 ^; {" ~$ H7 |0 T! ^1 _1 @
clear-all
, p3 ?7 n% Z J& ^4 B m0 W5 d setup-patches4 x$ s, c& v n) Y2 a4 p9 k
create-turtles 100
5 W; K0 i( K5 V# f do-plots$ z& L( a+ |! o8 j- l, M
ask turtles [ setxy random-xcor random-ycor ]. j0 K9 m5 |: Y
end
# k. } ~+ R7 j# J' _1 a0 xto go- |) ~. \) K& m# q: X8 }1 S
move-turtles/ G/ \: P6 [, M$ U$ N( l4 K
eat-grass$ W$ q% W/ n- b3 S f( K# F J, h& v
reproduce0 u4 q2 F. P' _- z2 o- G
check-death. Q; g! D% f( X& x$ I, b
regrow-grass6 J4 R' A$ M# u6 B5 Z" g U
do-plots# U$ [/ R* h9 k4 Q) I
end2 E* b; j3 @. u7 [
to move-turtles" ^& y# u0 ]& `: u% p$ m: R: ^/ t R
ask turtles [
! k9 r1 K4 ]4 [" n4 b right random 3604 }* J/ Z* y1 q! P1 `0 [
forward 1
1 Y4 E8 E: ~4 H2 a2 K: J; q- b set energy energy - 1
: j4 i: J/ N0 J! W' K& ?) I ]6 V- z& ]" ?% k! b" g) J
end6 t% y2 D8 w% B5 Q* q) J$ N
to setup-patches4 t( S- h" _9 t6 Z4 {5 F( O( r! e0 s
ask patches [ set pcolor green ]
+ e8 L2 \ Z5 z" f6 D; qend0 ?! Z3 w# _, z- o/ X; v* d
to setup-turtles
" F* \( j* [( K0 b% K( v+ C create-turtles 100; z( n( k$ o$ B' d9 Y
ask turtles [ setxy random-xcor random-ycor ]( X1 Z, M X9 f) C/ L
end
, T3 R" ~, ^ c8 dto eat-grass v; f& Y7 _8 e8 m0 ~; S
ask turtles [& v+ }1 G4 x! b
if pcolor = green [, a- L+ s$ Z/ V+ H5 k8 g# J: z
set pcolor black% U0 ^9 p. B5 D' ^" j6 F6 L$ Q
set energy (energy + 10)
5 L! F* [+ r( ` w; O) m7 f ]% }4 J- c4 w* j2 e
ifelse show-energy?
' u1 I8 Z% z5 y9 q [ set label energy ]6 @* L' \" R# n2 I* S
[ set label "" ]) r/ V, q4 t" h0 @' b
]
0 l7 O2 F* T% t: X8 K9 M8 \end
. [" m7 a6 o. I. N9 Cto reproduce5 `: x; R3 m n( M" G3 i
ask turtles [6 R- e9 M$ K ^4 `# X* @
if energy > 50 [9 F, F: a& a8 ~% J, v; b& j! K
set energy energy - 50
3 ~$ b* {' Z2 ?. ?/ y8 [! c5 h hatch 1 [ set energy 50 ]6 E& h& Y! I3 h" }1 V. E
]7 z$ }0 d2 {- e; [0 x' h, S
]9 y- g. l4 u# Z3 D J
end
# v% O' W4 K; ~! i- [! \( f) Mto check-death7 Q3 h: P9 k/ I- S
ask turtles [% J9 P `2 N) L) F3 B. K
if energy <= 0 [ die ]
, m' |7 R) y+ u; [$ { ]
4 l* |/ M+ @" E0 Y8 yend8 A% z% I6 n8 \
to regrow-grass
/ T, V% i- V* A' p$ \ ask patches [
& G5 s9 @7 [' P- w1 z if random 100 < 3 [ set pcolor green ]
% k3 J6 J/ N; M8 R% o$ D ]5 H& M: g; L) K8 M& Y* d7 w3 q
end4 U3 l% g- e+ R
to do-plots
# J3 @0 X" m& x5 c. _ set-current-plot "Totals"
1 D* I$ Z! A8 {$ u8 \- ?+ ^5 n: P2 W set-current-plot-pen "turtles"
M" [2 S% S# i! T1 n+ I plot count turtles
N( T; x3 S* @ set-current-plot-pen "grass", F& \3 _5 X9 O: e$ z$ N% z' S
plot count patches with [pcolor = green]9 \4 U+ H+ p% _$ {) ^( h3 U! x
end) {4 b8 a# a# N3 [, K
可是运行时提示no such plot: "Totals"
: O$ q8 q" I& [2 T7 |$ ?7 U# _error while observer running SET-CURRENT-PLOT
7 x3 i6 ?, Y5 {% @) w called by procedure DO-PLOTS
' N$ E+ { j# J9 i) T: Y' A5 k) I called by procedure SETUP: s; c. q3 k8 [
called by 按钮 'setup'
. b4 h/ A3 f- O: g求大神解答啊 |