我编的程序如下turtles-own [energy]- Q) j2 |. o. Z0 A$ _
to setup5 X- K: g3 o' ^# C* G% ~4 l; m M
clear-all
k3 A; x, @4 n; H setup-patches
1 S5 h1 x D. \: k create-turtles 100
+ @) I5 y6 k7 S G& o2 T/ d do-plots: i- q" b& X. ]% c$ v7 _8 O! ^, X
ask turtles [ setxy random-xcor random-ycor ]# R3 h8 v# E6 |& B: d
end
9 X) h% [0 N0 _: }to go" b& ~2 C* O y# w9 L
move-turtles
6 d6 T7 d1 X% G8 o" o eat-grass
V( z0 x$ g: ? w, Z) L reproduce
! I( Q" x5 y7 U& U+ g check-death
8 ^) k9 N' U. A% m- U, n* T regrow-grass
" L) ^: E* g/ G5 R6 v' R6 m do-plots1 e8 l+ E' l: Q
end: s! `+ c! ^; K& C3 m" d
to move-turtles
8 V! j d* q7 d/ i* Q ask turtles [
5 _- K, |( m" @9 a/ e* ^ right random 360! [( @1 H) N, j# E6 O+ |. v" T& a; ?
forward 1
9 ]6 m# W6 Y, g/ F set energy energy - 1
! p0 d* x7 L2 q( Q ]
' R& G( @9 H% X: R9 W; Iend
' f9 B) R; n0 eto setup-patches3 o% P7 ~- w4 c* i8 [
ask patches [ set pcolor green ]+ s# I. \# r, I6 J' X& b# b# r
end
5 C& x- O: T' i2 T" C: Y* \to setup-turtles
9 g d+ w5 z3 s9 F6 ?0 ^* y create-turtles 100
+ H. V: t" U( z# I6 N# o5 _# m& D ask turtles [ setxy random-xcor random-ycor ]
. a# h1 h3 t9 Yend
% r! k4 z, [* X& L- V& g* W/ y3 f: L9 gto eat-grass
0 b. N$ i* B) D d ask turtles [
9 i5 |+ l% V6 U: D6 p if pcolor = green [
" G) b2 H' C4 j1 J, y/ p: Q set pcolor black
1 N8 {$ H) b: r set energy (energy + 10)
0 `6 `: h. q; ]3 n ]9 {5 c+ o% w. u% _
ifelse show-energy?, x' z& G: l" J( q$ u
[ set label energy ]4 b2 g) m% g" O# U1 }+ I
[ set label "" ]
6 U- G2 p r$ _% F( ] ]1 H! ^4 X/ E& d+ ^
end
( Z+ X+ s( l) N- \to reproduce; b) E% a; i; N
ask turtles [
7 t* _! K0 d2 y% e* @; k) j* g if energy > 50 [4 E( ?) R! o; h3 w
set energy energy - 50
: r7 T- v; T1 s3 _ hatch 1 [ set energy 50 ]8 Q( ?- B: v% a2 e; c @" I; b! t
]
j0 Z# Q4 J% e9 e2 C4 K ]5 f* ^* P5 Z2 B
end1 L$ c2 G2 a* m) [
to check-death
5 L( o0 q, }) B# s ask turtles [: L0 O2 f: w9 }- X3 e
if energy <= 0 [ die ]
0 E( O6 w* r8 }( {3 k ]- }$ ^, L6 Q& I4 ?% _
end
; x- g( C. F$ Q5 ?2 m. H+ Eto regrow-grass1 [, [2 ~& y9 {7 x6 h/ g5 F
ask patches [
" B. [% Y6 e6 W! c if random 100 < 3 [ set pcolor green ]
. C& q/ Y+ _" V" L% G+ C ]
9 S4 C$ I6 v# d7 Q. G" S9 oend' l+ k/ {; Y5 `" V6 M
to do-plots/ ^- ?1 {+ J6 u ^
set-current-plot "Totals"
6 C$ i+ [ r; T8 ^% [ j! Q, { set-current-plot-pen "turtles"
! J9 k" P2 i% T8 j plot count turtles
. n4 }! b; F% s) M set-current-plot-pen "grass"9 @2 u: a9 M, z
plot count patches with [pcolor = green]* u7 {/ s# Y$ Q$ @
end
3 D, H8 ?5 n" X5 I, T可是运行时提示no such plot: "Totals"
8 T) K) F! Y3 X/ `1 }" d3 ierror while observer running SET-CURRENT-PLOT) s+ Y( t) ?5 D4 b
called by procedure DO-PLOTS
6 m G5 h: f, y called by procedure SETUP
: U! D: B/ O6 R) O6 X* q W, i( H called by 按钮 'setup'
, ~7 |: ~' m, @1 I5 O: e5 ^2 Y; Y求大神解答啊 |