我编的程序如下turtles-own [energy]
+ _2 E/ X Y. ~: F7 |& q! Ito setup
/ }( p% n3 Z& t clear-all# o ^5 ^: x* a& ?0 E7 L
setup-patches. X8 V9 @& M2 d
create-turtles 100$ c3 F! z! q, b) d- O3 s8 K
do-plots" n" @* \* r7 S& h4 L
ask turtles [ setxy random-xcor random-ycor ]
! W# ?1 i: l( t. M; Q U/ Hend
! Y& n' A7 L* Q/ r( W$ Cto go" d( H' R v y+ G
move-turtles
5 I* h1 V2 |9 H- f: h8 K9 p eat-grass
1 |) h4 C' k$ @+ d- \ reproduce6 U: s' O! J) i
check-death
6 `3 w7 a' Y" N. ~9 O regrow-grass
2 m4 R) D, i; N2 ]3 ?3 d6 F; f2 C) x do-plots! D1 h. N$ T. h% @% x2 [
end
; J* Z) ]2 i! W1 u! p% C: u% Y- Qto move-turtles6 _# z8 ^, B8 d" Q" i( C4 i
ask turtles [
0 l; y& u* _ I4 ^+ B right random 3603 m9 v$ C; \! s1 u' ]! R" p
forward 1( V! z$ ~1 F* K7 A/ r- V+ _
set energy energy - 1' @7 e0 n% c0 u% Z
]
! `7 w' Y- d5 P! `" Rend* S% ^6 O) f4 K! a5 i
to setup-patches9 Z. b, m' L/ J4 ~
ask patches [ set pcolor green ]
5 s) q3 X! [$ B( i) \/ S* F7 B7 [) |* `end0 p7 ]; t/ ~: U& I& X* R* g
to setup-turtles
- q& @5 H* M u$ N4 ~6 d create-turtles 1008 t: b0 d. N1 ]9 ?: h
ask turtles [ setxy random-xcor random-ycor ]& A) n" D$ {" h1 ?% Q( G9 Q
end
! L5 [4 U7 g4 ]! c: k6 U. f3 D) N9 |to eat-grass% I9 I2 T! w6 m; j! Y5 U
ask turtles [
* s5 @: V* c- l k, ^! v if pcolor = green [
0 E+ v" V3 z6 g& A set pcolor black
r4 u( T9 J, G. |8 e set energy (energy + 10)
+ G7 n9 L* {, n6 F$ h' U ]& C$ Q# l; X6 r' I8 R
ifelse show-energy?7 q: p& b% r/ ^# a/ a$ C
[ set label energy ]
/ h C4 ^+ `7 d v+ J [ set label "" ]/ ^8 e1 ]& O9 x# I, k
]
7 m7 X5 E4 N2 G3 g/ U7 }end/ a: }# C: H. E
to reproduce8 r. {0 ~9 k/ C& t( P; p7 F% |4 g" ~8 H
ask turtles [
: h8 F) X- V. _4 s9 `7 { if energy > 50 [ A' t( k! m; T, L4 f
set energy energy - 50
& X* K+ _) d" Z4 f& D hatch 1 [ set energy 50 ]
3 m! b0 b; j) F' E! u" W ]
3 y. J, `. H1 H ], h0 ^. S1 X5 b8 b# Q" ?
end5 P% V" W5 ~% }$ b# R
to check-death
, J8 A I' k# `; X4 ] v- ^* U ask turtles [
: i; |( J; B8 T3 I1 e if energy <= 0 [ die ]
' w l) V: q6 _9 v8 q' M% F ]
# J' b. r# K# G- r4 l7 aend; }& f& q- _2 k* E# P
to regrow-grass
! o5 i7 _1 }% L' A! A- G; P5 F ask patches [( O: [1 r/ t0 L) B
if random 100 < 3 [ set pcolor green ]
9 b1 y" F9 f' A6 J' x5 F ]
, Q- z& V( d+ S& f$ s: [9 send
1 m& y* s# Y5 o. n! V' |to do-plots8 u! D! w. C/ \% a0 n1 K! S
set-current-plot "Totals"
( d# q+ |5 W- Z; ^ @ set-current-plot-pen "turtles"
, g2 j# v, Z" ?1 g; \( {" m plot count turtles
3 _& W/ f$ X7 O. w. I* u$ N) ? set-current-plot-pen "grass"- [ e8 q/ L+ Q7 ]2 I
plot count patches with [pcolor = green]3 k1 e4 ?" p+ E8 |( i+ x
end
2 b; O9 [; Y8 Z) Q& a% ~9 d可是运行时提示no such plot: "Totals"
* |1 |$ ?$ o6 X5 Gerror while observer running SET-CURRENT-PLOT) O5 n+ V3 y+ E) H9 E5 e- ], `
called by procedure DO-PLOTS) @. Y( ^# \4 q9 f+ S0 K- l
called by procedure SETUP8 i% O& { {( Q, w
called by 按钮 'setup'9 S; v9 n# w: ~$ x1 }* V
求大神解答啊 |