我编的程序如下turtles-own [energy]3 O6 ~& x8 H _8 A$ X+ g
to setup
: `! ^* n5 p) N/ v* } clear-all
" R' }' {7 S: R" c" n5 Z$ m# H% t setup-patches
5 P0 z( F H' z) W create-turtles 100
9 r7 M. I3 v+ s( C1 V& y do-plots
2 Y" `- I2 _- u: Z v- u) P ask turtles [ setxy random-xcor random-ycor ]/ Q6 ~* L& t6 K" {
end
. J$ n: {" y @- P# \' j$ P' Pto go
* Q2 j4 W7 b( R! i move-turtles
) N; [! L W) s1 U" T5 v' C: F+ M eat-grass
J& p6 z" \& V# A% K) }9 c reproduce
5 I5 p8 I5 G4 @4 C. p5 |5 c check-death- v! U* o) W% W
regrow-grass7 {$ w, J4 ?3 z) B
do-plots, G' D) q& r- B" k' {7 ?( I
end
7 b" j% t! R+ h0 ?' j& `1 ]to move-turtles
0 U/ l! U8 ?) |# Z& |5 w+ L ask turtles [* Z5 d; N Q8 B+ f: g4 M6 T( a% n) R
right random 360
; S2 Q7 B* _* Y forward 1
" C$ d' X% j" `6 h1 E# \ set energy energy - 1
3 {: W" Q7 ^" n+ v. u ]5 _0 J2 f( J6 C# J; ]
end$ G& c! e7 Y$ Q
to setup-patches
0 P) Z2 }2 `& E ask patches [ set pcolor green ]' b1 J- ?- q6 k' B$ N5 i
end& _8 o* l+ {9 M, K' z
to setup-turtles8 N: K* _1 [9 w4 ]1 e+ L& a
create-turtles 100
+ B9 K6 d5 ]) V3 d2 f. W ask turtles [ setxy random-xcor random-ycor ]6 H+ @6 K4 b3 `, f% J& u/ t0 w
end
: ~. s4 w# T. ]6 o6 K# p: b/ W; ?% Cto eat-grass+ x3 d: H/ [8 f# n5 d- Q/ F
ask turtles [
4 K) w0 L9 j3 n6 C if pcolor = green [6 v* H5 K: k5 |
set pcolor black
& @3 `' U2 x% O& c0 z' T# m set energy (energy + 10)# z' ^. i* i0 r+ t* X# P7 I
]0 k% ^! z+ v0 r
ifelse show-energy?; @# ?+ F! f# w2 g8 [
[ set label energy ]6 z% Q% C" V8 g2 u$ k( C
[ set label "" ]
6 @2 w8 B6 U7 {) J+ u1 a d, E ]
* @/ V7 E# e- z$ ^) K3 P4 L* }end; b6 q6 K; q- i! I6 ^& G
to reproduce% B' G7 e+ K8 v' F$ D2 {
ask turtles [ B+ O! j0 r& |+ @5 E9 c
if energy > 50 [
2 c4 t8 h' s; @/ { set energy energy - 50* k8 A/ j4 k! P+ J- m3 X
hatch 1 [ set energy 50 ]
0 t9 |9 }: B$ m( o. k6 e ]: o4 _, X$ H& H: \: D
]
/ {- r: U1 R9 o. r/ Cend" Y" }# w' h) z: ?: T
to check-death
, O/ D9 j) o4 P6 A) p6 Q ask turtles [6 o' }. x# d M7 W4 A
if energy <= 0 [ die ]
- ~, M. d% A/ p% K$ X2 D, W ]3 e# m5 H: |" K' f) X
end7 s" f# ~) x S! H$ }$ L8 K8 E
to regrow-grass! S+ Z* R' l: x
ask patches [. u* s+ V( d- j& a1 ^% G
if random 100 < 3 [ set pcolor green ]; [; g* \ N& |- v2 D! i `& w% H
]1 q4 r& b; v% x
end) J' \% y% o2 g" }$ R2 f+ k
to do-plots1 G1 {- W! p8 c& S% g
set-current-plot "Totals": T% l7 l+ g2 h9 t, |
set-current-plot-pen "turtles"
4 w9 e$ {' [9 o2 D" N$ c plot count turtles
' Z, z3 Q3 r" B# D8 ~* w6 l" q set-current-plot-pen "grass"
0 Q6 y$ i3 v& s plot count patches with [pcolor = green]
9 }' \1 T* X0 I: o* `; [end
( u2 _( y9 j3 A+ c% s可是运行时提示no such plot: "Totals"+ n- N* A# X" Y( N
error while observer running SET-CURRENT-PLOT
6 C- u5 ~6 p" _% S+ r: I called by procedure DO-PLOTS
* ?( p2 d" r( d9 W3 R, F$ U3 c called by procedure SETUP0 C+ r9 E# `4 ^( A! L
called by 按钮 'setup'8 q$ D1 F9 D: o# ^
求大神解答啊 |