我编的程序如下turtles-own [energy]( Z5 p' Z' i; @: u7 }, Q4 p
to setup9 H) f I3 f! s; i, ]1 X5 O4 ]/ z
clear-all
0 x l; w# x& C$ y setup-patches ?" p: t* K( T2 R
create-turtles 100
; B, J0 ^' b! `* S/ o3 C0 K: c do-plots
8 y/ @$ f4 l# I' a2 P, d ask turtles [ setxy random-xcor random-ycor ]
- d& P7 `, E- b+ d5 b4 ?' kend
( h0 M9 \0 R2 S4 z. w5 r! L" Mto go+ O& B5 L, S7 Z. x
move-turtles
7 j1 t4 p9 p# r) M( c9 u eat-grass
5 v* j: _. Q, { reproduce
9 x* l' v& s& J# o# w* e* w check-death& ]) {" \" v2 ?
regrow-grass
5 u# [! i1 S, o% |1 T, o# [: h3 ? do-plots
1 W3 r' G8 ^4 ^# S" eend& N7 p5 W1 f8 j5 l/ i* S1 q
to move-turtles
- a3 l% C* }; b, w; {/ X ask turtles [
/ J% p2 U, q% M% t right random 360- O$ ?" b0 w2 I' f* X3 c1 l
forward 1
7 c; m" w- ], j( b9 q, x4 c; z set energy energy - 1- y0 Y$ X9 Q+ M
]) d: p! ~; @5 F; O( `) ?) ^% J# ^
end
& ~- p+ {' j8 p0 H; H/ S' Kto setup-patches# W* f) H8 W# ^! p# _$ T; ?7 ~
ask patches [ set pcolor green ]1 @; O O1 y; e7 A/ Z
end: c' G k$ a; @8 _8 q4 x
to setup-turtles5 ~% }, I! D f) X7 {! r0 F9 _0 v
create-turtles 100
$ c* r b4 x: [. w- L7 D& Z ask turtles [ setxy random-xcor random-ycor ], w8 E. X( a2 p
end7 M" v+ p& J: W2 l3 g/ w) Z# U
to eat-grass
4 Y7 |; h0 @" J& z ask turtles [
# z" D8 w' w* k8 @7 {) k5 w if pcolor = green [/ ~; f. ~0 {, u) R* O% T' T
set pcolor black
9 s6 B- G3 E4 A* g set energy (energy + 10)
8 ^; o1 ?+ [: C ]
2 O, y$ ?2 _& h' p ifelse show-energy? ^, U6 }8 g: {+ d' Y2 S+ V
[ set label energy ]
# k9 Q2 L1 o/ k# x" q z [ set label "" ]3 J+ v% B6 p0 }2 b1 B+ t
]
# a0 R( h$ t% I+ W Y) s/ @end8 r" o+ T5 c( e2 [7 W
to reproduce8 N2 T- i( f$ m
ask turtles [9 t0 n" v+ A% q& d; Y& e! C/ _- U
if energy > 50 [
: Q5 [6 ]4 U9 f+ z3 o, z9 ` E set energy energy - 50( l+ V8 \( A7 X( \, h
hatch 1 [ set energy 50 ]( t F6 {+ W1 A7 T5 q
]: m% l& q, [( P' z) E; {2 G2 K
]
: T" y1 \7 R7 H6 P/ [, gend
6 z% m8 E: R# q! p' `to check-death
6 Q) n8 U5 l" T% R# g3 q9 \' R ask turtles [! T3 y7 b! h3 U3 \6 |/ A' d
if energy <= 0 [ die ]
, A3 i3 x- L* @# I% \/ v ]
4 Q. u) c+ U! T* k/ e4 jend
( \8 V: p- Y/ \2 x* k: E9 b* }to regrow-grass4 x" K7 b; l `2 v/ g6 y! L
ask patches [* v7 z* A# N1 I
if random 100 < 3 [ set pcolor green ]
/ y$ w. ^7 L. s6 J- x" @5 k ]
' v4 ]7 r) b3 dend
4 ?# ~; Y6 {) w8 U8 Zto do-plots
- U" |& c! h% [" N0 x% ~. t( Z set-current-plot "Totals"6 o5 R" ^% g' f; { ]: b( x; {
set-current-plot-pen "turtles"$ x' ]; H. N3 p1 }
plot count turtles4 i7 t8 `) v/ G# o
set-current-plot-pen "grass"
3 o- s5 q+ M3 A+ `' M7 k6 K8 A9 } U plot count patches with [pcolor = green]
5 \1 O1 m/ I W) j* [end& b) ?1 Q0 y$ I
可是运行时提示no such plot: "Totals"' w+ W* {1 |6 y8 Y3 z( l; r
error while observer running SET-CURRENT-PLOT
3 }0 x- J: @8 `. R: K5 m( B/ _5 ?4 B7 g called by procedure DO-PLOTS
, }/ [8 E" F) D8 w2 [/ D4 f called by procedure SETUP
) l7 F; M' n& Y9 ] }: P called by 按钮 'setup'( K* c0 V s) F2 {% p
求大神解答啊 |