我编的程序如下turtles-own [energy]( U' ?3 ^- {3 N$ G1 w, A$ f
to setup# N+ C4 P" c( A, G8 a# M& k
clear-all
" b) A, C* c9 j) @5 g setup-patches
4 ?. d/ A' v: v3 B" p! C0 ^! W create-turtles 100% w8 {$ j- I, Y6 F" a: j
do-plots
& z* s# T! G0 H4 r ask turtles [ setxy random-xcor random-ycor ]' l1 G( C* z: b) X% ?! H
end
& y6 q4 y9 K" M H; ito go
3 h$ @9 Y& j5 E! Q F move-turtles
4 g" c* G! @3 R7 m, B eat-grass
9 R3 I5 a! S! v5 c$ M0 Z reproduce
# W% e$ w( D4 E" x- ~. k check-death! U6 W/ J, v' q* N; G, G/ l; K
regrow-grass
, K8 f7 W1 X0 b$ e do-plots
9 p n$ U6 z+ L' f& @9 D/ s: Iend
% ]$ Q% E: `, x* Eto move-turtles7 w& P3 d S- F7 ^, Y/ F6 E
ask turtles [
" U0 K5 T. O' f' F0 y! c: S4 E. g right random 360* Y1 l ?/ ~2 X5 \7 X! f+ y8 N% j
forward 1
) f) q3 C9 ~' z9 M0 u1 r* ] set energy energy - 1
' z% f2 F3 \6 n" a& x4 d( n ]
S* e: Q* v- Dend& i7 U' s% r$ n
to setup-patches
- d( m4 T6 Q, ?, l/ J ask patches [ set pcolor green ]- R8 x0 Q/ u! @( U
end) B/ g; ~# W% z1 Z8 q: P
to setup-turtles: z' B$ `: D) h* f* F
create-turtles 100( O/ P' {; W2 h! ^+ u& f
ask turtles [ setxy random-xcor random-ycor ]
% c: q4 W _' qend
6 g4 H3 G3 o- _; Mto eat-grass" p8 p. E" ?5 q8 j0 M7 r" X" U
ask turtles [
& q- ~& C& k' k' ]$ o+ F5 b if pcolor = green [# s$ H) p6 j2 H
set pcolor black
% P( t5 d+ a: y" Q% p; q set energy (energy + 10)
( a) x0 m0 f5 U ]! E) ]/ y0 s) ~
ifelse show-energy?
3 x! @6 O# R1 b3 q8 {" x [ set label energy ]& w. y1 X" W l7 j1 D
[ set label "" ]
: v9 o! _+ J% x2 D ]
1 W* Q, \6 [& \& Q5 F# l9 pend
3 c" t, f; R% E! `; g5 _to reproduce, q5 R* p) q! m% h% h
ask turtles [
3 {# J0 \. x; w( a+ j6 [ if energy > 50 [/ ] f$ ~' o- g5 a5 C: u/ K
set energy energy - 50
! N; p4 b: l' Z( }+ O' D hatch 1 [ set energy 50 ]
! T$ M3 T+ a& Z- P; K ]( J; z/ P9 m& `$ I: ~ G: @8 }
]" O& z5 w7 w1 C3 \2 ~2 V/ A
end0 l$ X/ E/ u$ z$ u& f& m# G: y5 h$ o t
to check-death
! Z: ~# t* D" a8 Z! [ ask turtles [
4 ], f% \0 c2 j( `& U3 w- | if energy <= 0 [ die ]% o% Y" a3 A5 l7 Y# f. E7 X3 O# R1 L
]
8 k0 {* p, l- g! Z8 ]# D+ J2 send
2 y. C5 l. f' O: O+ Z, @to regrow-grass
& z3 A. Z6 ?7 P9 Y0 { ask patches [
% Y k6 d+ _* T q if random 100 < 3 [ set pcolor green ]
5 E4 [ P0 X# f$ d+ c2 H ]
7 I6 e* W' Z4 S' Iend
3 Q3 Q: f4 |' z, V& u- jto do-plots
# x/ w2 `! |3 q# T1 b. ? set-current-plot "Totals"0 r i* ^( ]6 a% Z' P( m" u, u
set-current-plot-pen "turtles"5 l2 y4 }( n0 Z* O, M& h
plot count turtles
. I) b" q' S! h: F set-current-plot-pen "grass"
: k% W$ r$ a2 Q" `+ l& z plot count patches with [pcolor = green]: P7 G! M `" d) O T7 W! Z
end
+ g) @9 [- o3 O4 |3 {4 r可是运行时提示no such plot: "Totals"5 [, J6 }. j [
error while observer running SET-CURRENT-PLOT
* D( b' O2 D1 G7 P( d- O5 f called by procedure DO-PLOTS7 a! s. L4 V+ {* v
called by procedure SETUP" Y1 K1 _) ?+ n- p- ~: W: x g( k
called by 按钮 'setup' U1 P5 ]3 z5 ~4 P& w8 U
求大神解答啊 |