我编的程序如下turtles-own [energy]
6 b( h8 O* p, d, ?to setup
4 n' W3 h# V0 K clear-all' [5 c4 o1 {" I+ I) f
setup-patches
7 A4 m& }9 q: U$ T1 W create-turtles 100. b& X# m" n! z, a
do-plots/ ^6 P7 X& y/ R" R, {
ask turtles [ setxy random-xcor random-ycor ]8 k7 z$ q" W3 |4 K4 \
end
1 L% u8 o4 Y. y, L$ S2 [; I' ?to go9 ?+ }, `1 x0 O1 W% K
move-turtles% {% \8 l2 ~5 J( e, W2 S% e
eat-grass
0 K/ O$ W" R' Z# V% u reproduce$ S- | V0 e; G: N7 r
check-death2 a* P" W* _+ i" [5 u
regrow-grass. d- I$ O% Q+ y
do-plots2 H6 q% J# C% k( A6 u( k- K
end& \8 d0 N- w" e1 w! ^5 j1 d. {8 ~' j
to move-turtles
" i7 }2 R) o, d: h) L& p: R ask turtles [' |; p2 M$ v; q1 o& U, H5 A
right random 360
6 d' k, s* |5 C% n- U forward 14 W1 r8 \6 P! k$ Q( q0 U1 Y
set energy energy - 1* p8 A; ~$ M. m6 d+ W6 u
]
3 N+ Y0 O7 g0 V6 j: t- Iend
+ A: d% s. I0 y9 Vto setup-patches
7 r u, {4 S5 T1 P' ]( k ask patches [ set pcolor green ]
2 [+ S& b, ^. }8 n1 u8 Cend
8 `7 c- P+ A4 Gto setup-turtles
) B% K9 \: ~9 {: w* Z9 o create-turtles 1009 g0 p3 O7 |9 B) e& W, G
ask turtles [ setxy random-xcor random-ycor ]% Y+ [! V$ A4 \3 \
end N" B% K3 B* d, e/ q! w
to eat-grass
; B+ p- q+ O. K, V1 p7 z8 V0 ? ask turtles [' T# {* D. j7 \
if pcolor = green [
7 {6 e9 U3 f5 k: J set pcolor black9 J6 ]' G ]: x- H; U3 J
set energy (energy + 10)6 \) t% f2 z2 ?2 e, z
]
2 d$ Y* w; i, @5 e& E4 R- [ ifelse show-energy?
3 X1 R: [# d4 R7 H9 E0 p [ set label energy ]) v! y7 @& q" T! f5 K
[ set label "" ]- x/ k' u- H% k) N
]3 X2 B3 x- g1 q* U) _% w
end! S: }" u. S4 f: s
to reproduce V- {/ \: c* e- m$ B
ask turtles [
+ e- e5 Y, R! T5 z+ a if energy > 50 [
5 ~. z3 H! s9 f5 V# ^! D4 ] set energy energy - 501 k9 S% [: c9 C
hatch 1 [ set energy 50 ]
: t5 r8 I8 }1 `% z ]; k w+ k, L2 q! U+ \1 W' r/ J
]! W, L+ l# L% D
end
% v: B2 k0 q3 k% |3 [! c% r* ?. Eto check-death4 w2 m" A2 G! I- {5 J# f* \
ask turtles [5 ~) D" o9 J( u; N
if energy <= 0 [ die ]
) I( O, |! c8 Q$ _. B A, e" m! H ]
1 n; v; x/ o$ A- c" t& a# p+ pend( G- b: A" P6 ~5 E: ~* z+ `
to regrow-grass
# |% o+ r4 s6 b. ^) ~ ask patches [9 d. p& D" U2 {$ }5 l1 T
if random 100 < 3 [ set pcolor green ]
* h I& p+ Y$ T. y* U2 l. Q ]
! s @0 M3 G4 Oend
8 O' A- K- k8 X3 s. f# H/ Z* `/ \to do-plots: [% k9 t) l Y9 q+ D6 a
set-current-plot "Totals". f# D9 ?& S8 G
set-current-plot-pen "turtles"9 S+ _+ H/ I% m" ^9 ?
plot count turtles
$ A: X2 z. T& o0 x/ s/ Z set-current-plot-pen "grass"$ o A6 R& Y3 {3 X* m
plot count patches with [pcolor = green]- O& p/ n' X. k6 E! I0 Z. b4 Z
end+ e' `8 {( P0 @" i
可是运行时提示no such plot: "Totals"
/ B5 ?1 v B6 P( t0 lerror while observer running SET-CURRENT-PLOT- e5 k7 a" `+ F
called by procedure DO-PLOTS
( J% Y9 E/ x7 O4 h# l called by procedure SETUP0 x" `( P7 i1 y) T5 r* ~( E
called by 按钮 'setup'1 {8 ?0 y; N; J
求大神解答啊 |