我编的程序如下turtles-own [energy]
' C1 A! K g8 I. cto setup
0 N! t' a" `2 X: H: \ clear-all" D- s' P! s" y! t2 F9 G& k- k
setup-patches
. p+ r0 T0 U# v: o create-turtles 1000 b: N0 l1 I7 J3 I0 Y# N! y
do-plots
/ @4 K8 \. Y) Y, B* ] ask turtles [ setxy random-xcor random-ycor ]- N; q* b0 \7 Q
end
& @/ S9 Z' a# O5 ito go* E+ l$ R9 w5 u
move-turtles
9 |# s' `( W; h/ |& Q eat-grass
! \+ b" t% f7 v: e0 H3 ^ reproduce
/ y+ d. S6 B7 w7 S' F check-death* _% b" [4 ~* N2 Y4 x7 I- [
regrow-grass+ Y0 r* _% c8 W2 z% m1 \" K- r
do-plots
0 p: }# k0 u- _$ t) d6 H1 \+ fend% J k8 N9 x1 j8 f: T& a4 e$ C* a% q$ d
to move-turtles
5 z2 Y$ M/ L9 h ask turtles [- r3 T7 J: _ ]7 c# i7 |; Y5 m4 b
right random 360. v; B4 w5 T: k
forward 18 ~" Z# \9 N# y6 b3 p1 C
set energy energy - 10 r$ L* ]! R, M. w! N, z
]3 l: L) [( h* s$ C8 a5 e
end
" {5 a+ M! Z3 {2 X1 w) q' Mto setup-patches8 ?6 K) i# ]* \! h
ask patches [ set pcolor green ]
h$ Y4 J+ ^1 A8 e" a5 D5 b& Gend
. p! q& p) X! u$ o% F9 `4 R8 l# q, Vto setup-turtles8 Y( ]8 @, v1 a7 T, Z5 A, J
create-turtles 100) L# f" D% e! ~# Y! X- z5 @
ask turtles [ setxy random-xcor random-ycor ], F2 r4 u# d. p; d' A D* o6 e
end
a# v. i" Y6 W+ ?. |to eat-grass
) R- P- C: Q# }6 n0 |8 }0 k% P ask turtles [
0 k$ O# b1 e7 d7 `6 ?0 r if pcolor = green [
' A! u- M+ ~( t s& N set pcolor black& V2 o( A4 j4 Z7 M1 A# y B
set energy (energy + 10)
+ Q/ D9 Z) M8 u3 X9 ?" v ]
* `+ U2 p; i! R ifelse show-energy?
1 S) R A/ A1 T9 w2 \# K1 ^ [ set label energy ]- y/ k6 e" t% _6 w* ^
[ set label "" ]: c' h1 m. D* d1 E. c0 P5 M2 m
]
2 P f8 m4 W& S8 @0 Xend
7 A0 X& d M- g4 h5 h9 jto reproduce
7 r6 s6 [. |- u ask turtles [) T% p- s3 w' U7 j
if energy > 50 [
7 i' A# h: y* p6 S% T _ set energy energy - 50
& r* R" X/ `" R! o; q hatch 1 [ set energy 50 ]
C: s8 g# b) x! b ]
2 v# j6 B% x9 @# d$ G) Q9 f ]0 R/ Q7 `; h- x5 _$ B! L
end
: { r: }7 |$ A2 u9 ?to check-death
% r7 V3 |# c" [0 d e ~ ask turtles [( ?+ |/ x5 [6 A) \
if energy <= 0 [ die ]4 k2 ~0 y: d1 h
]
- g4 t( V+ Y* _* @: z iend
/ D8 o2 F3 w% Yto regrow-grass
1 y' p( Z" R% I* t+ q ask patches [% i- Q- [+ m+ Y" @& H4 L
if random 100 < 3 [ set pcolor green ]
8 @8 T3 E5 [6 I9 G: L! U ]
( f; E* V8 I3 P# K$ [% q2 G6 uend
0 ~9 y9 N) q. G# G/ |( eto do-plots* q9 y: u. t) s9 j' C s O
set-current-plot "Totals"9 w0 }6 b/ e$ _1 @3 | ^
set-current-plot-pen "turtles"9 K. j! z, G, ?8 i
plot count turtles
' @( F; i; n } set-current-plot-pen "grass"2 R C' T9 ]" W
plot count patches with [pcolor = green]' s5 e* p" W" D3 g; g+ _/ W
end
; S. D- c; E+ x* o可是运行时提示no such plot: "Totals"+ R' t$ P; c5 o" q( U# j
error while observer running SET-CURRENT-PLOT; ] _, `- Y& t q/ x
called by procedure DO-PLOTS, g6 N" P) h. }5 u0 c8 |8 e
called by procedure SETUP
0 O; d( P Y' c* t$ S% r; ~. [/ z called by 按钮 'setup'+ w' ^% c. B, c
求大神解答啊 |