我编的程序如下turtles-own [energy]- p, m& S9 h5 f9 {8 X
to setup
3 Z( P2 \+ L! x* l, v clear-all
/ e. P( O& n+ c setup-patches
6 y+ i% @' a0 W( u create-turtles 100
4 Q8 M" Y/ T; F) v( z& k do-plots
; L& T; `& y, b0 H5 r8 y' P; a2 M- l ask turtles [ setxy random-xcor random-ycor ]4 q3 P& C: k# q, A8 V8 @" g
end
. x% E3 M! z5 C* z- U2 rto go4 p& v( t& u4 F" }, V
move-turtles: P% g4 y3 B* s6 z4 N8 \4 b
eat-grass; ^8 q6 \, P l4 Q
reproduce
) U* s5 _& v, n; i" u; i check-death
6 D, n& {2 U6 N. g& h regrow-grass* u/ y! ?, U# z7 j, j1 x
do-plots9 J; ?* }* z5 ^( J, d9 L
end
0 j% S7 U6 t: v; Z0 ~2 Q' r8 rto move-turtles( G) U5 A' z* ^ b2 q4 E; F
ask turtles [
/ y* p6 V8 T- Z: S/ U% W$ e4 L right random 360
7 x# ]. s G" j& S2 K8 T7 |: e/ |( e, i forward 1
( Y6 _1 S* G+ I* A set energy energy - 14 U; X/ c6 d+ B; Z, C
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end
3 P6 q4 A% R' N: U1 T+ Tto setup-patches. p5 L$ P) ^3 U- o
ask patches [ set pcolor green ]: M5 s( O" u8 d& W
end0 m" d! z* s/ `' e. s: B+ Z
to setup-turtles! t: W- V( A" d/ I3 V
create-turtles 100
+ h4 l: b s8 l1 t. c ask turtles [ setxy random-xcor random-ycor ]
# W% U/ O+ k" ?" }end
# w$ n; H( o# j7 N C5 q0 kto eat-grass* ?. U2 p8 n1 B9 ?
ask turtles [3 N2 n& d! N- _9 u: d. r) ~# @
if pcolor = green [. d. E& q% f8 p; K! E0 e4 E
set pcolor black
7 a" _/ v7 U+ S( j/ ?$ m7 ] set energy (energy + 10)1 T, I3 B l' i% G' o) w
]# z* a# s- m' q6 {" e3 c
ifelse show-energy?: Y) Y, V0 E6 X( _4 g" n( D
[ set label energy ]9 v; W( P, w$ S S* v: T0 H4 Z
[ set label "" ]0 {: Z+ z9 a" D8 s8 ?( e$ E* u
], T' y/ v8 K/ F0 x: P; n, t1 E( y
end4 l: M& }/ x8 P" {, V
to reproduce
0 ^7 G) @7 w5 P: a0 j ask turtles [
$ r7 J7 x9 B) w. M! |4 T# b if energy > 50 [
' N: w2 u# x; x+ q; k' Y set energy energy - 50# N2 U6 N( v% }9 | s& M: l; L+ ~/ u
hatch 1 [ set energy 50 ]* k+ H& z# y% w5 G
]
* h# f3 E2 V% W- I2 P ]
8 ]4 [, p3 \- ]& \ h; Lend6 J& c3 x2 ]+ ^& v7 I
to check-death
5 X) i: l z/ C; k ask turtles [
9 f4 a+ O5 N3 S# a7 i if energy <= 0 [ die ]
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end
4 y8 B0 X& M! ^% L4 w }to regrow-grass# S% f0 ]% C [1 M
ask patches [
1 ^6 `4 P1 u. f1 U3 @" M7 p if random 100 < 3 [ set pcolor green ]
& k2 q+ Z' a, W0 H/ Q ]1 s4 f8 Z( Z$ a* E) Y( ^* {
end! y, T2 N) Z( a# E
to do-plots6 ?" P% [ _* K7 D! R3 R
set-current-plot "Totals"! I6 G, R6 [! t7 C" p7 x8 y
set-current-plot-pen "turtles"; p( J0 K1 y3 k! \1 ~$ ^) G$ K0 _' P, U
plot count turtles7 `9 i. @8 ^- s4 D
set-current-plot-pen "grass"+ }7 \# x7 x5 O- R
plot count patches with [pcolor = green]( u( e& z1 d! w! U" Y
end0 p5 t9 S ~$ w* L. D l3 h9 B
可是运行时提示no such plot: "Totals"
' [5 t& z3 Y# k( z/ d) M+ L( \7 derror while observer running SET-CURRENT-PLOT
4 O1 i; q0 h- B) e$ T called by procedure DO-PLOTS
( n& O, g1 g \. ^7 I% y2 [ called by procedure SETUP
3 M; ]0 P: x. F0 Q3 W called by 按钮 'setup'' v2 u! c$ U9 o
求大神解答啊 |