我编的程序如下turtles-own [energy]" [( o( b$ F- o- m6 H2 t& c
to setup, I1 @! `( k* A% L7 C( w5 @- ^
clear-all; ^$ e' x* W) [1 b% L& |
setup-patches+ A- K( S W# _7 j; P$ H% ]
create-turtles 1002 k+ _6 \6 k& c
do-plots/ [' x6 c/ J, M# U3 V; B
ask turtles [ setxy random-xcor random-ycor ]# R$ X5 N8 e! {
end
; C' J8 F2 J9 q c, Bto go
- k, K- ~/ [4 U; l$ H7 R4 L move-turtles
( q$ ] o/ k9 d4 c+ J eat-grass
K$ ]4 s* z# z8 Z2 L reproduce' T" b" z5 B, h- Q+ p) M1 g
check-death9 p2 X; O9 r9 y& w# S% B
regrow-grass
; M, h0 a m5 O! Q1 g7 e do-plots
' L5 i) C$ ]0 h" X3 Jend0 w+ s3 R- I# w
to move-turtles+ ?% h% x. C, {1 a: H4 T
ask turtles [
) }4 o ~6 }+ s% `! p5 C! n% c$ X right random 360
! i8 @4 C9 ^2 w forward 1! l+ C2 y% B2 G0 V) T6 H* ^7 N
set energy energy - 1" `6 R8 ?% s P, f) H: c$ D
]4 B$ B$ {- }( Q2 s y
end( @# b/ u; l4 h# H6 y4 p- H4 ?7 _
to setup-patches
/ b8 M! h; j7 s9 f5 {2 {' Y+ k ask patches [ set pcolor green ]
4 O. i: a6 P3 n" T: `+ Mend
- [/ \/ k) P- t: u4 W7 N: u8 Yto setup-turtles7 g5 R/ K" L; F. Z
create-turtles 100
- y4 H3 B7 m" B- ^# t+ x+ F ask turtles [ setxy random-xcor random-ycor ]
0 L. f. X' q( pend' _& p4 Q% y! h
to eat-grass
7 d5 Q- K5 i2 P; l2 Z ask turtles [
! }" l9 o+ Q; x if pcolor = green [4 t; W) j6 g) L2 ~3 ~/ T
set pcolor black
6 ^9 O" N8 e& {4 W2 [ set energy (energy + 10). i) p) s* N! B" I
]
& Z# ?' r) S, T m ifelse show-energy?
& w3 J4 { ~& \$ V6 q3 l [ set label energy ]
& t0 g; z. @( D0 L; b [ set label "" ]
6 e( @; V# R* M6 H* T5 v ]/ O9 @$ S/ B; W( |: C$ i
end, K' u5 T0 p3 z. m
to reproduce
' b# v0 T. g$ ~( T$ W) O& g ask turtles [
. I8 a( W7 A, N, ` if energy > 50 [
9 |& X1 u! p9 ]# [ set energy energy - 50* Y; j1 z0 n' m
hatch 1 [ set energy 50 ]& X( J4 g5 }# g1 `' _
]' E) A, p0 F. @! y# K( G
]2 A3 k! K0 w# K6 T& f/ v6 M' M+ L. [
end, I: X9 P3 \. E8 \
to check-death
' F/ S$ Q+ k% e3 y. K1 B8 H ask turtles [; v6 R& }5 y- Y' R
if energy <= 0 [ die ]# T5 A2 E" b" c
]
) R" |/ p# K9 M2 T* y6 lend, }' r6 `9 ^5 R& p- f: M
to regrow-grass
7 m, n1 B( }! S8 B3 ^ ask patches [
! v. {- Z: A3 d# V if random 100 < 3 [ set pcolor green ]. S( w; H: O& p. v, U& O
]
- J9 p3 j; N/ d% A# E, |* D# Uend9 Q' W' V; C6 t5 Q" p" K( _
to do-plots
+ T1 S9 b; H* n set-current-plot "Totals"
$ S9 h# G# K6 n# x: w! w5 l: } set-current-plot-pen "turtles"# ?% |9 B6 \5 p2 O$ Y0 y' e
plot count turtles, Q; G2 x. o/ @& f: G
set-current-plot-pen "grass"
* _1 D" Q4 m8 n4 w/ L plot count patches with [pcolor = green]
% m6 f ^8 \" g+ c" S( Send
0 S" r4 g$ V( n+ n, \5 g可是运行时提示no such plot: "Totals"
. k$ T/ A3 q; O( werror while observer running SET-CURRENT-PLOT5 S# K( Y: G( v
called by procedure DO-PLOTS( n6 q3 o2 ~3 u5 Q6 L& U' x
called by procedure SETUP3 h$ h% o: N# u; A& V
called by 按钮 'setup'
% {/ b2 ~- R1 l( R求大神解答啊 |