我编的程序如下turtles-own [energy]7 X, J- @: X! \: a
to setup( }5 o- Q1 S$ i& n$ B8 D
clear-all
* P& x" a, [/ ]% b- y& | setup-patches
9 }" @6 a; N' D7 U* H8 G' d create-turtles 1000 n5 j5 b0 Z' b* ^$ v. J
do-plots
+ E/ {: U* }* g% z l* _ ask turtles [ setxy random-xcor random-ycor ]
! P) |5 N) r# m9 eend
( X1 \0 e! S! lto go$ a/ Q- B4 s: u9 Z% x6 ~
move-turtles/ W5 n3 a! k( O" n
eat-grass" c3 g9 o4 U& a6 s# ~# s
reproduce
! {# I5 i! u0 `* Z- U check-death
' {6 t- f' f0 G/ S& V regrow-grass4 g" P1 J* ?; Z8 l
do-plots/ w. Z% t, l' d5 |5 I
end
3 q0 S" B7 I9 }5 Vto move-turtles" h# ^( v2 {8 Z0 C. j" v$ Y
ask turtles [: o: q1 f, C& F& y2 J$ M2 I. ^
right random 360! n3 V) H6 V9 T/ S$ Z* S
forward 1( c8 V' [, Z& L9 }, x" x
set energy energy - 1) I( K. L C. m# o: e; K
]
, j) o3 L2 S" m8 K3 eend
1 ~+ n0 Y, D" g5 R |to setup-patches: P& |: Z) ~! s/ F; i5 ]
ask patches [ set pcolor green ]7 [1 c" h; H( P. s7 b
end+ a9 V& |: \. b0 x( F4 ]2 A
to setup-turtles
/ W5 ? D1 Q. j3 [) O, s! \, S" N0 ` create-turtles 100% g( N, }- c7 Q0 v$ e
ask turtles [ setxy random-xcor random-ycor ]
7 R/ \! q( M5 cend
3 T1 L# ?- y" f' A# ^to eat-grass
' X6 P2 \. l) \6 {! D( j* C ask turtles [
& z9 @/ {8 ?' A$ A3 c! O if pcolor = green [, b1 Z3 u3 n/ s
set pcolor black2 w' |# }0 d: u( z8 S7 X! b) w
set energy (energy + 10)
" U% h9 ?# Z; _% C% n2 U% S% ] ]0 a' w1 g7 O7 U
ifelse show-energy?% u' U: ^* _4 X8 U/ _' O* p8 n
[ set label energy ]
; i( @: y( H% f7 H5 _1 K; E$ Y [ set label "" ]% e. H1 W% ?" s8 J% K
]& I: e+ _3 @4 i# l% d* t* M
end
! o0 y* U/ a4 q$ e: Hto reproduce
) `6 h7 k( S1 ?+ N ask turtles [
' P3 V& v* l% O# a+ M f/ o6 D if energy > 50 [# s: v9 l& T2 v7 P% }. l- S
set energy energy - 50+ b, S! e' R. J1 @; S
hatch 1 [ set energy 50 ]: V6 ]/ j% T. q2 k7 e
]
& Q1 t$ V* W" {4 v! J' D2 _% N' l ]8 B$ N- E3 g" K+ J- f4 L) T* f
end3 r; o' w" k# m ]
to check-death
: D- E8 K5 @: h2 }& H; [ ask turtles [
/ v7 L( U1 z5 g3 @; f8 K if energy <= 0 [ die ]
$ o# W. d5 |4 ? ]
% L9 \ ?6 g4 Z8 q( @2 s( I: @6 eend
! L/ G0 }: J/ mto regrow-grass& J$ X% L& Y! y4 x l% m1 o. o# h# d, [+ A
ask patches [
2 n, j5 m# e; f& M if random 100 < 3 [ set pcolor green ]
, A% z* L' E" t7 c* I& O- N ]+ C* s) d6 X1 e/ I
end
) ]; n, j, O. W. ]to do-plots
" F, l5 j( E- Y/ F7 H set-current-plot "Totals"3 S$ d5 d' _# y. S) k9 X; }- ^
set-current-plot-pen "turtles", j5 ]7 |+ K$ i/ @0 [5 N5 t2 P- H2 n
plot count turtles
) V( h+ Q/ y4 c set-current-plot-pen "grass"9 y2 ^/ r; o% c- y" q
plot count patches with [pcolor = green]+ m- e5 N+ q: p+ `
end
o' L Q) i* y1 S- t8 w可是运行时提示no such plot: "Totals"& y, Q/ V# h" V2 ]' j
error while observer running SET-CURRENT-PLOT
4 [* B3 {1 C: v2 {! C2 u called by procedure DO-PLOTS; H7 {5 P/ m' C
called by procedure SETUP
5 [% D9 n A @ called by 按钮 'setup': e: F# @4 G7 C# m. V
求大神解答啊 |