我编的程序如下turtles-own [energy]
6 ?2 M! h3 I# K& @5 `1 pto setup, L4 \: m' b4 d/ K/ ]- {6 g- s
clear-all
/ |9 f% C+ M& K setup-patches
% b" n9 v8 A w7 x, Z- F8 Q create-turtles 100
. o! C. U. t0 A do-plots' s0 @7 W8 L/ W. U: a, I
ask turtles [ setxy random-xcor random-ycor ]
, F: ?; Y- v0 r2 }end
5 [) ^- L* F, s. |3 f' [; A4 [ @to go6 r, t% N' m3 ~& f }6 ^
move-turtles; S+ J) d2 U( _- a
eat-grass9 h' K0 Y1 \ {8 a: L0 J; k
reproduce& [( s: v/ S' j$ Q0 b
check-death
- ?5 n+ S7 y# I, V- ?# n regrow-grass
% ?) P6 A* }( M0 l* c) N5 c do-plots
1 C/ P# A: G1 `/ { Y0 e1 Mend
' g- `6 v" ~5 U# \' kto move-turtles" W7 y& a3 Y" O) N5 v$ t+ K
ask turtles [# `4 h$ s# z, Q j9 t! S: l+ r
right random 360
0 D: I9 L0 v8 f- _ forward 1
0 V& Z, z ?1 X+ [ set energy energy - 1
0 b$ W; q, W" H1 b' T- e) T ]
7 i: q: ]% k/ ]4 l; Pend
/ G6 y2 R9 z6 f, eto setup-patches
- h) g$ n6 ]$ q5 f8 B; Y ask patches [ set pcolor green ]
% r. B3 P8 A! s) g. M* @$ m. Xend8 j' `% b. @# o6 y
to setup-turtles4 g: G, U9 i/ L9 L
create-turtles 100
8 M1 O5 b& ?/ F+ A h( B! s ask turtles [ setxy random-xcor random-ycor ]
. p( p8 h9 ?/ o2 ~* e, B# ]end
# Z; ~7 Y* O: {to eat-grass( N* `; n1 i; I! }; E
ask turtles [
9 Q; k' g6 s& E$ E. [" H if pcolor = green [
5 Z+ }0 N' b5 P) l6 r N8 T; v set pcolor black! F6 l! D- A' Y4 P8 Q
set energy (energy + 10)% O, R4 ?8 ~: O3 Z8 I
]
3 u' ~! Q; E& m' o& R3 C ifelse show-energy?
3 z* V3 u, i4 `9 x [ set label energy ]
1 Y0 O- I# I5 B [ set label "" ]0 e/ z: w+ i3 ~" i1 V
]' S" |: T) p( a( U' `- t$ ]
end i# p/ [; T' `
to reproduce2 ~4 j! |( k9 j* S$ `
ask turtles [
) e3 n( o% }1 f if energy > 50 [: t' e% p w1 g, x$ B: A
set energy energy - 50- R5 n5 @3 ]; Z- o, Q2 K" G E% i2 d
hatch 1 [ set energy 50 ]5 P/ ]8 F" k( h2 r4 _3 n
]' u4 A: v) Y7 o1 g3 ~7 j0 f/ b
]2 L m: d* w' K$ j2 v c9 ]) B
end& ^4 \" [. J* q R
to check-death
9 X- s2 [! A5 }& K" w ask turtles [$ y% N4 n; M8 u7 ~, p/ {1 R, S( N3 c8 [
if energy <= 0 [ die ] K. B& B( m, ~$ F- i
]& O! h2 j# H& M& @
end& a6 v& \6 U5 G4 F; D- X1 h7 m, P
to regrow-grass/ V2 Q9 n5 c2 O1 P
ask patches [! S, S& l6 g/ Q" B3 N1 t/ O4 Q9 B
if random 100 < 3 [ set pcolor green ]
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end9 Q% V% T( v8 u; K# A! I' m# {
to do-plots) `& N0 |# X! A3 b3 m3 n
set-current-plot "Totals"" c1 p" T" b4 Q& ~( A! ~
set-current-plot-pen "turtles"
. [; N. G' l0 |; `% k y plot count turtles! |; E! t& I9 ]; `# L! q
set-current-plot-pen "grass". A. Y1 P* h2 N# |( s: M
plot count patches with [pcolor = green]2 X6 B0 g- M [" a9 m
end6 U; p3 K- J7 ?* x( s( e2 G
可是运行时提示no such plot: "Totals"% h. x# I8 k' a+ Y ^- ^& E/ x" W8 m$ t$ s D
error while observer running SET-CURRENT-PLOT
5 ]& S! t ~1 j3 J2 |0 V+ p called by procedure DO-PLOTS
v# [2 l7 Y' g1 Y called by procedure SETUP4 d# f* c' I' S. [/ _$ [- ]
called by 按钮 'setup'
9 g1 S- ~3 }6 a; j求大神解答啊 |