我编的程序如下turtles-own [energy]
- t- v' w1 q6 E+ `* Z% l7 K) h6 ?to setup
5 x0 X% ~$ T7 _$ f8 j clear-all
' L/ r- a$ {7 R: D0 t4 [ setup-patches
. y% T1 B* q9 b( \& p create-turtles 100
1 C/ Q8 D" a1 J2 p do-plots
% W9 t8 n4 [1 H' R$ B& j+ m ask turtles [ setxy random-xcor random-ycor ]3 X' X* M. m6 ]; H% T
end0 r# q, ?& Q7 ]
to go2 \, `- B# R0 [% m6 T- w4 N
move-turtles
. Z9 O% J2 L) K9 G+ u! J0 B) H eat-grass# q. O. P0 h Z1 L/ h
reproduce2 P" d7 u! L, Q. T; S. H. A
check-death
# T0 o: R& E+ h3 t, V: R# M! W0 w regrow-grass+ M- D. X; e4 u6 d+ L7 D; v* W
do-plots$ r# o5 Q. X& p- S
end' j8 U: h3 h" J% ~( \
to move-turtles
+ r1 U# P$ u# G ask turtles [& J2 k5 T; i) T, v' u2 l
right random 360+ I; l9 M3 G d/ j9 q; F
forward 1
) u* c4 }3 Y' X W3 T; O+ { set energy energy - 14 N+ J+ f: U+ L! n5 N8 K
]
3 g: m: Y6 V. pend6 z, V% V, w! T9 O7 A& ?! s
to setup-patches q L, P* W0 t" w8 x
ask patches [ set pcolor green ]; I! Y3 a3 Q* m8 L
end/ L: O; C) e# R1 U# L' _' u$ X/ V
to setup-turtles
. H: ?3 _# ~6 P4 W create-turtles 100
" ^) J$ j6 H' C2 g. H2 y G ask turtles [ setxy random-xcor random-ycor ]9 i; X0 X0 Q9 c2 d' l
end
Z g5 A& t' o/ \to eat-grass4 S+ Q! w' g6 ^+ m' k% b* ]: U
ask turtles [5 F: t6 J2 C7 L+ W
if pcolor = green [
~1 K+ j, w3 k! q$ M set pcolor black
3 R7 b/ n2 _# B, T& \8 L set energy (energy + 10)
9 c$ k8 ~& J: E' \' l ]+ {7 d! U7 q9 y- f2 z) x
ifelse show-energy?4 {! l5 C; H; R+ i0 X' m' k4 L+ s
[ set label energy ]* `6 v; [& y" C, M6 C7 y9 Y4 B! c
[ set label "" ] c& W- s1 p+ ]1 _( Q: |6 E5 L, }. U
]
9 c$ o7 A f+ S% s! k1 nend
7 i2 }. ]: |4 p# Q9 y. wto reproduce- y- h# |( A& S
ask turtles [( q, `$ T4 X* j( L( j
if energy > 50 [0 ^. f8 J* K) S- P$ x/ x& ?
set energy energy - 50) Y: u' Y- S% s0 v* T; N6 W! c
hatch 1 [ set energy 50 ]
6 e- b% @. k# B5 r2 L, G7 R1 e ]
9 R2 h; H/ F( j f! W2 Q# Z) C ]
! A6 f5 I" P s5 P/ bend
& R* E' H$ a6 ~, j* ^6 D$ yto check-death4 M; m2 E+ Y3 s5 X$ s* K( h" Z
ask turtles [
6 M# T( r+ z: S6 l if energy <= 0 [ die ]
4 Q$ ], ^6 _! I: a y3 R ]5 Q, p" r& Z Y8 F! e
end
# i7 r. X6 J( ^to regrow-grass( V, p+ T1 Z/ u
ask patches [5 |0 n7 H$ [+ c' |7 M
if random 100 < 3 [ set pcolor green ]/ V/ Q; c/ h8 O: B! S9 d8 D: E0 b
]
# e. ?! v$ T8 q8 H8 P6 Gend. q1 C$ Z& p M H, x
to do-plots
8 {5 s Y$ E: u7 {& @, M7 J* A set-current-plot "Totals"3 q$ b2 _; z+ _
set-current-plot-pen "turtles"
8 y, g) O3 Z j8 a h8 x5 W8 ?3 a; A% M plot count turtles
: n9 I' e% }' W" D+ i9 ?( i set-current-plot-pen "grass"
5 H* p" l# ~* Z6 R: W! N; e4 \1 m- z plot count patches with [pcolor = green]
( d1 |- p) [0 R% T! V; aend
% v+ Y+ H- @+ v1 \& Y- J可是运行时提示no such plot: "Totals"
9 q# G% p! p7 U5 ]. |error while observer running SET-CURRENT-PLOT1 h2 E6 z. r b/ `4 ]# T4 G. _
called by procedure DO-PLOTS
1 W/ D+ [, W# g9 P7 ]" X! M called by procedure SETUP- v' E9 {+ z9 v1 i
called by 按钮 'setup': g! D9 g4 A& d) r9 a7 l- b1 t
求大神解答啊 |