我编的程序如下turtles-own [energy]# N6 Y0 r" ]2 T5 K5 r
to setup& X# q8 h1 g9 ^( t! e8 i7 p5 @8 x# S
clear-all
- ^( i# c( O7 X3 l$ U/ K1 d' v1 E setup-patches
; A4 F) q1 ^& k2 D7 i5 A& l create-turtles 100
5 z! b0 c6 X6 V! P do-plots
# G5 m3 z- ?# c5 j0 ~ ask turtles [ setxy random-xcor random-ycor ]& u+ s9 x1 r( q9 ?* w
end
+ I$ X7 I5 k# p- _+ x% J5 y$ Sto go
+ Q& A$ j' x4 f5 n4 A5 _- G move-turtles. t* U1 _, \, J/ _+ O. X6 p: ]
eat-grass
; i/ Z* a# _: l' Y0 ] reproduce! d3 R/ w# n# h: ]. N) N( ]
check-death
8 c5 f& F8 G# I' I& i+ O regrow-grass
, r( y8 n" k( M( N- v6 b# w9 z$ @ do-plots
6 ]+ C( k0 n% y1 ]' C: Kend
7 H, v. [% t" @to move-turtles6 k, L- c; {& K# B4 Z
ask turtles [
/ A+ U! \& C) [. U% s i! { right random 360
; j( v: z5 W! J7 _6 b& m forward 1/ e! V& |5 U3 O! T' S+ V
set energy energy - 1* ]7 M; n/ f9 c% y: \
]( \- J3 T% a5 Q5 S
end
# b- s/ J u% l' ^% D) g% nto setup-patches2 {* y! H/ L! m y
ask patches [ set pcolor green ]& o" |; t, u# N( X
end/ ^$ V' O' @' I) X6 ?
to setup-turtles7 T4 U$ U1 P- m
create-turtles 100
! k& R- M% L5 W ask turtles [ setxy random-xcor random-ycor ]3 [5 d! Z( G# C0 F; {* s$ c! z4 X& K
end
* \$ _) \! Y. }0 Y8 rto eat-grass
- c' i% j* t: C; @, j6 Z ask turtles [
8 x# Q8 M" }6 z+ L' G if pcolor = green [
7 e' E+ ]' A' q; _; o set pcolor black2 I& ^: F0 o0 t+ M
set energy (energy + 10)
! Z4 l2 j, ~8 x3 @, R* O ]; y2 @/ z; ?( E8 w8 V3 U2 P
ifelse show-energy?
5 y+ Q/ X7 R! q) s [4 q6 ^% J [ set label energy ]8 q6 {& ~# v# E1 Z8 W0 k
[ set label "" ]
( C8 W* m5 d J |% F. m6 b ]
! @' r. }4 Z' i3 F& a( X1 Hend
" O4 j6 s5 T) a/ Eto reproduce. C; u9 O7 m3 |* v! a( E: b" q
ask turtles [6 k) V$ ^! C& a* l, f7 l
if energy > 50 [
. b6 y3 z: y6 r9 D' ^& Y set energy energy - 50* w3 s' ^' g" t: ?" m
hatch 1 [ set energy 50 ]
' n3 P! e/ r$ r6 W* d) x' L/ h9 e$ g ]: \2 D% x& G$ x8 ]4 g( M
]# q. \4 F5 S" B! ]3 B! _0 Z
end
. x* M$ |# I8 Tto check-death+ H: C5 n- V T! ~+ U1 z) Q8 T
ask turtles [
# P! K+ T% g' h, U! d/ S if energy <= 0 [ die ]
9 c+ {( Q" G, w) p/ y ] [- q( |4 I5 q C( P( I
end
3 F2 ~9 c y: U dto regrow-grass7 |& \* }8 y7 r. v
ask patches [
( d) ~8 B Z! m" z if random 100 < 3 [ set pcolor green ]8 I7 a# z3 ~7 I8 B
]: L1 K" \. Y' H
end& A7 W; O, ]2 v: S. ?2 q' o Q
to do-plots- z! b% x5 k! p
set-current-plot "Totals"1 Y4 x$ E5 s( m; G" `: E
set-current-plot-pen "turtles"+ b- l% G0 d0 p6 t/ d: B- B" ]* `
plot count turtles9 m2 y# y. C4 J3 R3 s
set-current-plot-pen "grass"$ O) j+ O% V, f( ? y# b+ A/ X
plot count patches with [pcolor = green]
+ r- H0 l7 M5 M1 ^) yend
, j" l* u- `2 T E3 G: ?& e5 F可是运行时提示no such plot: "Totals"2 W3 ]& ^5 ~" } F" @' {- h) [
error while observer running SET-CURRENT-PLOT. @3 w6 [) t5 }. q
called by procedure DO-PLOTS2 R* z) \# ~* c) k# A; ~ r G
called by procedure SETUP
- U/ X" e( U1 ]3 E. u3 {) u: ?2 M4 ~ called by 按钮 'setup'/ R3 v' S' p' k- p" A* H
求大神解答啊 |