我编的程序如下turtles-own [energy]% N9 A I- J& a
to setup/ S+ j) j* ~3 l* y; W. V
clear-all' R# I* P. f1 H6 H" B9 E, G
setup-patches
4 }2 U7 W- h3 F u3 } ` create-turtles 100( B! D' d) S7 R1 v5 f- a
do-plots1 a' u, `1 q+ j0 w
ask turtles [ setxy random-xcor random-ycor ]
5 F) q( B0 G3 Mend7 g' H/ H& Z% W( W5 \& [/ H
to go! O8 c6 [% P; d1 N7 ?! ?
move-turtles6 N1 U3 Q5 f- W
eat-grass
+ W( W! n$ r/ L g# _8 j9 N5 w reproduce
, k# V% R2 h. _9 E) z check-death9 I5 _: ~6 {4 q+ N# u+ w9 Y# c
regrow-grass# W i5 h' A6 ^2 s9 h/ A
do-plots
! ?1 m O/ M* @& Z9 u, M; Zend
0 E- A% B1 S6 P3 C$ ?' z) {* oto move-turtles/ T/ _5 O0 F6 @2 u+ C
ask turtles [
2 a* h! }! {; Q$ D( o; `5 v, q9 a0 ~ right random 3600 l h7 J; R5 f( Y& a
forward 1
5 Z# z V( g. p& H, J set energy energy - 1
/ p( r1 ^, ?# [$ L. Q ], x* w) E+ h4 o/ w
end
1 Y. @+ O' K* h" Xto setup-patches, Z. U [8 k3 K* b( J
ask patches [ set pcolor green ]
, @, V/ e! X8 Lend
7 `+ k: E3 `. u% ~ eto setup-turtles- k. V6 f2 S3 v6 U
create-turtles 100
9 Y/ f/ q6 t7 d' ]7 @* h! N8 z ask turtles [ setxy random-xcor random-ycor ]
: R2 {2 r0 U0 n. rend
! t* d% T5 d3 e3 Y9 Qto eat-grass: B: V! j6 d1 a: B
ask turtles [* }/ s) W/ i! x# I% P
if pcolor = green [$ ~# c# p! B1 a5 Z# [
set pcolor black
w, q8 z8 S* P( h) W( R) t+ I" r set energy (energy + 10)
6 t% s& P% ~) [+ l/ X ]# a! e% [) D2 |
ifelse show-energy?" _+ z4 C$ \& \8 l6 N
[ set label energy ]3 Y* d! T) Q- C( r- z+ l, D
[ set label "" ]
$ J1 Q% Q9 @6 P/ E8 R. k ]
' ^9 Z0 A6 _. G1 T6 ~' rend
; b; u/ n% v& H0 A# `" kto reproduce
& y1 M( o, I# E' v, { ask turtles [' H0 y( \$ J" I* _# g" \- X3 q
if energy > 50 [" P9 S; }: D" R. D
set energy energy - 50
: b) }! ~1 J% t. S; S3 [ hatch 1 [ set energy 50 ]4 o& ~" r& \1 H$ |
]
6 j7 g" s: E/ k, h- m ]
4 W; ?: X. D3 Tend
2 M" s9 n, x$ D) D2 \to check-death
' e0 q# C; ]+ d2 [ ask turtles [( y' ?9 p2 g/ Y
if energy <= 0 [ die ] x3 X1 Z$ B- n: l& M
]
9 w3 P0 I' j" d! P2 gend. k& b5 V* f$ F- o
to regrow-grass3 ^3 |) ?' A8 W1 U9 C
ask patches [
2 N; i: a G/ v8 h1 F, N" P if random 100 < 3 [ set pcolor green ]
4 X' I/ c: j( a9 d: W ]
# y e! ~ H) I0 M$ zend. G! T- S- y9 H) {' |4 a. n$ k2 P
to do-plots7 d( Y) U/ K5 z
set-current-plot "Totals"
) n8 q2 o4 Q; [) p- t6 |: A- P Y4 W% ? set-current-plot-pen "turtles"' m8 |. |" R; K! o
plot count turtles1 m' P- r! P# q& H" W! K8 B1 K
set-current-plot-pen "grass"; w0 f- m, f4 @
plot count patches with [pcolor = green] y. S2 h D# @3 l+ _+ L
end1 ]" d7 M" g' X) f1 Z( b8 q
可是运行时提示no such plot: "Totals"8 L/ G: Z- W6 e; H8 _3 H
error while observer running SET-CURRENT-PLOT" B; C: ~' ~7 t
called by procedure DO-PLOTS
' p) ]* W' Z! z. T4 d! F+ _ called by procedure SETUP6 ]3 _% h/ K3 R* d2 _
called by 按钮 'setup'; v0 A% ~7 ^. j$ d' ^
求大神解答啊 |