我编的程序如下turtles-own [energy]; n3 L) h' t+ x; Y( Y, q
to setup) Q6 `, _9 [) j: g4 Q5 c0 s% ]- l
clear-all
+ n# `, v$ B1 a) y% w( w# l setup-patches! g" ^. |7 n5 o' U
create-turtles 1006 K; e. b, ]& H, L5 `* ^! ^9 M
do-plots
- R$ \! X$ p- n4 Z% u$ B3 O0 v ask turtles [ setxy random-xcor random-ycor ]
/ B$ K- T6 f: H3 wend) R% T5 I5 D2 D( g( @, w" t
to go7 V; @) ?; K* N. s' |& ^3 h& N
move-turtles. Z, p8 C C+ K+ }% O1 s
eat-grass
2 S9 R) r* X- {, W+ U- _ reproduce
; S; T. u* ]/ W' l( x. m check-death+ M: c3 B4 O* d' Z8 z
regrow-grass2 B; h; _- _% y8 O. D7 k7 G
do-plots
6 T9 s5 R: C' A. x y+ Tend
/ f1 X( P e; Z2 R. Wto move-turtles! n J- g- i( q* m
ask turtles [9 `7 z+ c6 l& D+ x3 P* U# t
right random 360$ g* F5 X' o/ b5 p; H
forward 1
1 y0 E; P3 N5 l) _; b# X set energy energy - 1
; n2 y: Y& W! U) d8 l, p3 i+ N ]
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to setup-patches
8 Y( _1 i' c6 D ask patches [ set pcolor green ]6 C& Z& R( }, E9 \
end" |, R; S' f2 s$ P) m" V
to setup-turtles/ P, a q' z6 w/ Q; p
create-turtles 100- ]1 `% N& t3 m5 U
ask turtles [ setxy random-xcor random-ycor ]
$ z1 X$ N- A; p% c$ }7 pend) L0 G0 b. u$ T( @1 ?& u
to eat-grass
2 N" E9 h9 L0 S( G ask turtles [
& e: t7 j0 a' h) I/ ?6 p u if pcolor = green [
& l8 l+ p* J' M! u9 o( n set pcolor black
- v v* S# |9 w6 C( W7 B S [3 X! r set energy (energy + 10), j# v* B$ {* u% q* {
]8 m3 E6 \6 R1 g" u0 u" A
ifelse show-energy?, r0 \; D7 @0 Y, c; [
[ set label energy ]
4 T2 A( z. g2 i. [0 D [ set label "" ]
4 t1 i/ Y$ K7 m0 a ]
. x' l U- I, T- I: l: Lend* u2 q8 R, |0 `7 u6 R
to reproduce
# ]# h, s+ l8 t/ a: l ask turtles [
/ t, Y2 [0 b: z9 v if energy > 50 [
+ t h/ ~" @2 W set energy energy - 50
8 U6 E9 X; d) J7 G3 a; H: p hatch 1 [ set energy 50 ]
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end
3 L& B0 a( h- ~: h1 Q5 b2 Sto check-death
4 y+ [ c; Y# R7 ^& m- v- l ask turtles [7 G! H* w: u( K
if energy <= 0 [ die ]/ K: ~, C# N3 R# s
]
; c- S" _7 _+ w) b2 b, Y2 E# n8 e6 Wend
1 h8 [# P4 U( \% y& u* dto regrow-grass) `8 _/ e8 \2 q6 u6 p
ask patches [
) d4 e" T% d% ]4 @; `8 [% Y0 e if random 100 < 3 [ set pcolor green ]( W, k4 q% V6 b/ A+ n$ m* _
]" v6 F0 V: ]1 [' D, _
end
: i' U$ D. X1 y& Pto do-plots3 v; I- F$ n- `; i& _$ M5 r
set-current-plot "Totals"
, F" o& K; Y) p* v+ X* P6 z set-current-plot-pen "turtles"
+ h' i0 v9 f( {- q: w3 G plot count turtles0 G8 N* O) U) A& j( W
set-current-plot-pen "grass"' k m6 w* Z9 k Z2 o$ {! [: k7 K! t
plot count patches with [pcolor = green]
4 M" Q* J! C# k) H) Yend
" K/ M6 u, L+ y! [. z; w% b1 ?( o可是运行时提示no such plot: "Totals"% b7 [- k2 y1 K
error while observer running SET-CURRENT-PLOT) l0 k6 C* A/ K& u; h( A3 }
called by procedure DO-PLOTS1 A* T$ B, L: M! K6 |+ u) l# V% V
called by procedure SETUP& S" x' i- n0 z' K, [
called by 按钮 'setup'9 {4 n0 Z2 m$ s8 W
求大神解答啊 |