我编的程序如下turtles-own [energy]
" ^% a( n3 p& t. @. |to setup2 P4 P3 j) k# L+ |2 L% ~) L% y
clear-all7 ^6 t( X! A4 l- c
setup-patches
1 X9 X! o% M1 S) B- n+ F2 B create-turtles 100. G/ t ?6 ~' P- ^
do-plots
1 p5 @% ~$ \7 W ask turtles [ setxy random-xcor random-ycor ]5 o1 N7 Q7 N: T+ x
end6 P& J0 s" c, z% `
to go
% C" e# G; T" Y+ }: D& ^& ] move-turtles: k9 c; t& z2 `) r# t
eat-grass
( B& b4 h+ h1 u reproduce: z3 ~0 M' q7 s4 y" m, k
check-death0 } a3 K, W$ t4 v( U4 U
regrow-grass
( Z- O, j. k9 K0 G8 ^4 y$ b/ h1 D% Q do-plots
5 l, E: @! w& q3 J8 O/ }* Jend
. Z$ `( A4 ?/ W6 Y) a( r, @to move-turtles
* |: Y' s' t8 s ask turtles [
8 }* f' ^2 b, u3 S right random 360
* ^. ?: A) u' E; ~/ @ forward 1
, f) S7 L3 O/ p; X: } set energy energy - 1/ ~ W( [) T7 H9 Y
]
; z* ]$ l0 f& Q& y5 P6 uend6 W, N; z5 h6 x. Y2 P6 n
to setup-patches
% Q6 D. ]/ f: ` ask patches [ set pcolor green ]
! i' c6 N$ x2 ^0 p- Cend
3 f( b0 C" V+ L/ v; T4 o/ ^. u: Jto setup-turtles
7 s: g! W- [: e' b' g& e create-turtles 100
/ ]' m4 `% N9 Z4 `, D, x ask turtles [ setxy random-xcor random-ycor ]& F$ ~9 p$ A) e; C# h
end
6 w/ {# w& T/ cto eat-grass+ V" }( \) q/ f5 O4 @( s. S- j
ask turtles [. G+ j" K( p+ t0 P
if pcolor = green [
% r$ _7 p% t& D1 } s8 [ set pcolor black* X$ p; L* v4 q1 G( F/ C9 T
set energy (energy + 10)* @: M6 d- g6 y1 }% v
]
' y% T% Z/ a% {0 k4 h- J0 h- a ifelse show-energy?
9 K* V+ H" `- Z7 }& u" T! g2 K' h: ` [ set label energy ]: {7 q6 X+ B, j! o
[ set label "" ]" [9 m4 E' q3 x) r9 {
]' g$ R7 e8 @/ t: a. t
end0 L: ?" }8 u0 s
to reproduce/ H! o& ^# i- c
ask turtles [
. O4 C2 v- ~" E: F4 z+ X6 F& O if energy > 50 [; F: S% ]/ ?. E. c
set energy energy - 50
, h- Q6 i5 K+ W2 y+ ^ hatch 1 [ set energy 50 ]
, k; }3 t5 x5 i. p5 P9 x3 L ]! d- o' W `. T9 A0 m
]
7 Y# O% b1 _' [" ?3 g" @end: ~0 c7 T* c* R1 `
to check-death
0 U* d f; _' [9 |; e3 w% m$ Y ask turtles [; D: X- m- [5 V# y3 T
if energy <= 0 [ die ]
" t6 J: @2 h' F) p+ F1 V2 a% Z# b$ Q( { ]$ }9 w" w( z) {) Z1 g( G4 H& [
end
, r1 [. J# I: Q2 uto regrow-grass
: \8 Z1 N$ L5 N2 ~ ask patches [. M: g1 i Z) Y2 a
if random 100 < 3 [ set pcolor green ]
' B$ _2 M2 ?: X) d. v ]+ w. {! e/ V8 Q" n! b
end" J' W" O+ m( X, v9 I; W3 p
to do-plots
7 q3 w' S9 t. R" L& R- ? set-current-plot "Totals"9 I$ c) [3 D% G$ U
set-current-plot-pen "turtles"* X" G0 `( f5 @& d' |3 b8 G6 R
plot count turtles
) x: G1 c7 z. ~! ^7 m. C set-current-plot-pen "grass"
0 _7 l% m' i) |( H( W, d, x plot count patches with [pcolor = green] @" _' {" b! o, ]; D( m
end
$ X: m6 K6 {. o0 w: N可是运行时提示no such plot: "Totals"
. S6 h; s2 k( ^, eerror while observer running SET-CURRENT-PLOT
- C) e9 I+ z5 N called by procedure DO-PLOTS
% p( y4 v- \5 A& u3 {# D5 H+ j. D2 x/ L called by procedure SETUP
1 E8 J! o) e1 t- W! y called by 按钮 'setup'
# ~% [6 v- W' T. p1 U- Q求大神解答啊 |