我编的程序如下turtles-own [energy]
6 a4 w. d+ n: m2 {8 ^" k+ hto setup8 u' Z- `6 ?7 @- N7 u
clear-all
% ^. P$ f* Y8 Z6 b9 K; l* A setup-patches
. i S5 T& K* [) B7 ? create-turtles 100$ L1 P" j. E% z: S E
do-plots* p8 K. I* z' T" C
ask turtles [ setxy random-xcor random-ycor ]" N/ U* q4 H' p5 M2 ^
end
- f' p0 H# R) cto go' U' d7 H# k* Y0 h
move-turtles
( B4 Q1 v9 C0 |- ? eat-grass
0 d% z# q( x8 P* z reproduce/ T- V" G4 E' T" z
check-death3 x* }( p6 m ^, p2 g1 p
regrow-grass% q) ] { i1 V0 t
do-plots4 J) s4 I; t9 G6 X
end
! b ?$ y! h7 n: Uto move-turtles
/ h! H" v% k/ |3 \: y ask turtles [
6 m _- l0 u* L- q; ^ right random 360
: ~/ W9 C5 J6 P# V+ N forward 1: R x$ K& s& H$ y; ~
set energy energy - 1
; i8 q4 {; l2 Z& ]5 @8 U7 K H2 q ]
3 ]% Y9 A; Q5 Eend
# R- S! Q% g& r5 d( O7 F3 x1 Yto setup-patches; n9 G( f/ V {* l1 X$ X( h, V
ask patches [ set pcolor green ]* R, P+ _; B2 F; D: `
end
9 `5 e% U2 B- c( e+ D- Z% gto setup-turtles+ Y0 {' @5 Y9 G# }5 [* f
create-turtles 1005 B. h7 G, d; R) }* f
ask turtles [ setxy random-xcor random-ycor ]
% a* j5 S/ U& iend
4 L4 d* P2 I' Z" S0 }* mto eat-grass- d7 j4 v6 S6 J& p1 K9 Z3 Z
ask turtles [! R+ d: Y$ `! V& W! R
if pcolor = green [
8 A) |2 `! x7 y3 _, U set pcolor black, o3 h2 W, [: F) G9 f1 ~
set energy (energy + 10)
T$ e! D" ?/ [% I8 I t, D ]
( d3 e9 V' i' X1 q2 k, Y ifelse show-energy?: k, G9 I6 Z+ Q1 ^: v! o
[ set label energy ]7 i; W% e6 E) `& u3 C8 I
[ set label "" ]! t0 \9 J+ q4 k! s8 P' U' ?; F
]
7 D. X# i/ H1 J/ | u% Cend
6 P, W9 l( l$ q# [to reproduce
- |* v- A& w& [8 E* H/ [* L/ u; H ask turtles [
/ V6 p" o: K/ a- @- o5 v' o: P if energy > 50 [0 w$ ] _$ J. @6 k$ T
set energy energy - 50
* r3 ?8 `/ H4 @, K' Y; Y hatch 1 [ set energy 50 ]
/ T. N; q' ~2 ~/ A# k2 b3 u' ? ]
2 j% x4 o' U& u; F- ] ]
! e/ u! }' E+ R/ T) P( _' ^end5 U& C: g) r, E. C4 z
to check-death; o' B8 }. X" u7 ?
ask turtles [, a4 J; o L3 y( i8 J" \% Y- E
if energy <= 0 [ die ]
# F1 H- `% ^$ K" m* N- v ]' b$ U/ W' z7 C+ F
end
- N; \# B" b" w- j) L% v9 \to regrow-grass
7 s8 D- a7 Z% Y1 B' H6 K; ] ask patches [
7 t+ E/ c4 `# q1 f if random 100 < 3 [ set pcolor green ]
, c5 T" P' @4 @4 q ]/ I, Y( V( }4 t+ I
end" }& }; k+ _+ E0 m4 Y) s) v4 h
to do-plots
, U+ Y# ~; {' E% t: @ set-current-plot "Totals"0 S2 O8 F: k# L' y) u- D j- B+ }
set-current-plot-pen "turtles"
2 B Q. X. h2 x; E) _ plot count turtles& a' l1 R* x0 A8 M
set-current-plot-pen "grass"' b6 `4 m: S6 d; G
plot count patches with [pcolor = green]" f- Y" B, k5 k' c9 n8 i2 _
end
- u* h' y2 ~: W* Y可是运行时提示no such plot: "Totals"
|1 F. {- S: Q9 \error while observer running SET-CURRENT-PLOT
! L# E L- ]" } p @9 Y! K called by procedure DO-PLOTS1 j" j" x: K$ X8 t8 h9 i/ d- Z4 M+ z
called by procedure SETUP G8 p8 i1 P9 o$ E- G3 N/ z
called by 按钮 'setup'
/ w9 |" n" w2 G3 s, c+ X求大神解答啊 |