我编的程序如下turtles-own [energy]
$ Z1 Z4 N' ^( i+ f: N/ nto setup: S1 @1 M4 G6 U7 G; @
clear-all
3 n- t% E: Y- z" p- F% ^* X setup-patches+ O2 s6 \$ l% p; _) [
create-turtles 100
' H: C+ T" ?; D do-plots2 j4 F( {2 G/ O4 S. N. n7 G2 u
ask turtles [ setxy random-xcor random-ycor ]' J* p* g" r4 }
end+ I: X! F- K! H1 M9 {" W6 |
to go
^. p& H5 j0 k1 L5 ]: b- ?8 w move-turtles
i# u3 z( p* C/ N- z: d M, n eat-grass6 v s! ]0 P9 b/ V; Q1 d9 `8 z& L
reproduce
8 ~" P2 \" O3 l: G/ [, o3 b check-death0 p3 [0 B" d( t
regrow-grass/ g2 x' k# ]9 w' t( I- C
do-plots
: V# n$ F7 O3 O* eend
: k2 U# m% _% x' ], \to move-turtles" P; q# ^4 R' S, C( G
ask turtles [
2 q" s- _, Q9 J# P0 f; v! y4 j right random 360+ B* ]: a* W7 V. @: d9 b
forward 1* P8 o: }2 p4 A
set energy energy - 1) t3 M# F# q6 [, H) n T
]) u `# e2 d. g7 X3 W
end
+ R/ M+ `# h1 D; ]5 hto setup-patches$ {2 u e3 Z3 a7 w1 m- u
ask patches [ set pcolor green ]4 O2 G4 S" {4 X. l$ h; m
end8 L# }0 q1 m& H8 I
to setup-turtles
/ h, n! E) n) ]& e7 f create-turtles 100
- Y$ K* x Z: W3 G, z ask turtles [ setxy random-xcor random-ycor ]
. l; `9 g: T# q ]& x0 E9 xend
/ o; \9 |' O! D7 bto eat-grass! e/ i2 |- n' f/ ~4 l+ e; X+ ~
ask turtles [
0 t1 R5 s+ f- Z if pcolor = green [3 h/ B7 ?5 N: s6 J
set pcolor black3 ~ |) T7 }' \$ r. Z, b6 d/ v0 U0 }
set energy (energy + 10)0 U) U) v3 o# w& X5 u. `, e# B$ L
], B3 ]) {5 ~% u3 `
ifelse show-energy?
2 r2 q0 O/ R. r# ? [ set label energy ]
8 b( i- m+ U1 \; Z. W0 L2 y [ set label "" ]% f2 d$ [6 |/ B9 ]" t, {4 m' K
]
8 C6 q0 Q9 J8 j6 h( iend
# O, @; ?; u) Z; b4 Tto reproduce1 |' H* ?, J$ A. D9 q
ask turtles [
: c/ _1 B8 e O% g& ` if energy > 50 [& J! |' k0 M! ]7 j
set energy energy - 501 a0 W- H) F& _; W, _) Q( s
hatch 1 [ set energy 50 ]
8 q* v1 Y7 h" ]5 ^( K7 Z ]4 l# x4 ]+ L. B
]
" E' a8 v) d0 k Y6 P4 a {- qend. I( b! z# J$ K- G
to check-death
9 D2 e! U. C$ Q$ e: a- h9 R ask turtles [0 k5 `# ]0 {1 J1 J
if energy <= 0 [ die ]! m1 H+ O2 Z& }( y
], m* ?/ \) ^; L
end
$ J, d4 d8 G Q+ Z9 L* j/ bto regrow-grass" l( F3 P& m' e/ d' M; a3 D
ask patches [3 n6 a* `# ~' ?5 X5 R4 Q: J
if random 100 < 3 [ set pcolor green ]
8 G+ M/ T( h3 k ]
, r2 N4 @8 g& v# R1 Uend" c$ h8 @, o; F8 S# K8 \
to do-plots
8 J7 h' o: M2 }7 z* U set-current-plot "Totals"0 ?# U$ m# Z: K* A: X- f6 ^
set-current-plot-pen "turtles"
" `( o5 a) I/ [' c2 i( m plot count turtles
, h; C9 ], g7 f+ b set-current-plot-pen "grass"" M8 \2 P) T4 O1 t! k. ?
plot count patches with [pcolor = green]
/ p" U# K8 E! y8 Jend
5 E, |2 q! `# g; G9 y+ I可是运行时提示no such plot: "Totals"2 p$ M5 @3 E$ b
error while observer running SET-CURRENT-PLOT, T* {+ n1 V9 s' X j. k
called by procedure DO-PLOTS
5 x- J/ b7 R" |0 C, W* M' ?& c called by procedure SETUP
" g- E! p6 Y, l. C8 q called by 按钮 'setup'; {$ t( {! S K* B
求大神解答啊 |