我编的程序如下turtles-own [energy]3 |$ J. D9 ~% E) o4 Y" q- [
to setup: I5 ]9 y( y/ n2 ~
clear-all2 G* O" l" H- _7 B2 B- n( a
setup-patches
: |9 l* Q8 A* ]) X% Y+ n( @ create-turtles 100
3 F, ?7 d: B' N! {: V( e5 a9 N do-plots
- g6 S- m" F! c- m+ p ask turtles [ setxy random-xcor random-ycor ]5 {' \: l6 W* c! c2 m% E
end& D! y. Q8 Z Q6 |) r/ z* |
to go$ m) @7 \( k& H
move-turtles- h! i1 N. X/ }; e
eat-grass! W+ V- q9 o+ Q+ H. X
reproduce+ |! _; ] B5 O- o" F* w1 S8 I
check-death3 L! b, k# c* ^4 ~/ v
regrow-grass
5 k+ @4 p( M; Y% o; J8 m; h do-plots4 `% G0 O4 K8 L6 n/ [4 ]
end( Y" A) S& ]* x, s0 X$ M
to move-turtles
+ a: y5 b4 k, |) n! d ask turtles [1 y! V, W/ |2 j* S
right random 360! L% U2 V9 d, g1 U p
forward 1; Q3 ]; h |4 z3 n' W
set energy energy - 1
: E7 y( K' C: M. F) z9 z' w& f ]
) R6 `9 k! i7 L R) _- @3 X6 y2 l$ Nend: b1 g' ~# t _2 r6 F
to setup-patches/ e+ `' u2 F' s" F9 H
ask patches [ set pcolor green ]/ T8 n( ~( G" O( y, P
end
: ~( G% v, q/ N; N+ ~: t$ K2 Eto setup-turtles( V, N6 B/ @% R2 V8 u/ p |& Y1 H
create-turtles 100# t2 m% |1 S! R8 H4 d5 c% R0 R, X4 ]
ask turtles [ setxy random-xcor random-ycor ]% \' T$ b& E% }! U
end4 a) x" ?( v& l. k# |6 r& w1 S
to eat-grass# m: R/ G8 i6 d3 n( }
ask turtles [ M0 F! w- E3 }% n# s
if pcolor = green [* j& \! ~+ ~2 P6 J5 J. z2 a' M
set pcolor black- j1 _0 K* q0 ~; B
set energy (energy + 10)
* U9 X& p" f Q' p2 u0 _' W% L9 ^ ]1 S: a# B0 ]' A
ifelse show-energy?" y8 o9 Z7 k6 D- t$ z: P* N
[ set label energy ]
* S% A; u/ W3 I5 l [ set label "" ]7 G2 h0 Y2 k9 J) ?+ F
]6 K- d0 y4 c$ n# ]6 h
end2 z" h5 L3 L9 _; H
to reproduce
3 ]( |- _2 w, k, B ask turtles [
/ S! S" w% {2 R" c- B if energy > 50 [
. m) T: y1 H% e7 z4 @. Y set energy energy - 50
, z3 L0 X' ?* [) u0 G" M6 F# v hatch 1 [ set energy 50 ]5 B, Y) \) z6 n/ u- u, o
]
2 s" t' g! y/ ]' n ]
t" d2 i) o# V1 i" V6 k4 gend
% |) \! b* g' T& j$ Rto check-death
5 q+ f6 c4 {8 |; I3 J9 I ask turtles [
3 w2 s) M" f8 i6 ^' S+ @$ o0 S9 f9 _8 Z if energy <= 0 [ die ]
' @* l1 B2 R; F V. u3 ^ ]
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to regrow-grass+ y# S* V) e( C' h1 Y. b: y/ D5 C0 m
ask patches [! K/ r( k9 Z2 N D( `/ Y3 G
if random 100 < 3 [ set pcolor green ]4 J& ~- E0 ~$ {: t
]
0 `2 K7 D5 n: w/ \( uend* U* q" _* b+ k/ w: @; ]
to do-plots" p$ r: d' J$ e' f+ {
set-current-plot "Totals"& B$ j3 ^5 a/ z( \5 ^
set-current-plot-pen "turtles"7 K; J0 w( s. o
plot count turtles
3 l3 }! R: J& g8 R2 E set-current-plot-pen "grass"/ B) Q P# j% E& D1 o8 k! A
plot count patches with [pcolor = green]0 V' j# q k4 d0 s
end3 K* ~8 h/ i4 m# _8 u% D( Z
可是运行时提示no such plot: "Totals"
2 [, F% b2 F6 n. a: W; Z7 ]' x! Serror while observer running SET-CURRENT-PLOT8 X1 w! m8 |# [2 B0 R
called by procedure DO-PLOTS4 I' t8 U" d/ {6 b* q) J9 e9 L4 A
called by procedure SETUP
0 }; s/ Q3 c8 W/ E u) }- I called by 按钮 'setup'0 t+ ? w3 i7 F& |7 g+ K u* ?
求大神解答啊 |