我编的程序如下turtles-own [energy]
4 L& ~+ {" s1 T4 h2 oto setup5 t9 H. C( p& {8 M
clear-all- b4 J! f: N( v, ~3 g2 y
setup-patches( N- ]3 y* h% q6 Z- J
create-turtles 100
. p5 x; p9 w& R3 B1 V do-plots
7 @& x/ I ^2 I0 l ask turtles [ setxy random-xcor random-ycor ]
+ y5 @' y1 L# u8 T# {* Iend
: m- L, h8 |7 P) l' U5 Rto go2 M8 X4 A; R# \7 f6 i3 J6 A
move-turtles% s0 G. p* O2 ?+ A+ |. ? l
eat-grass
+ P* n4 K3 y! I: R/ ? reproduce
/ s. H/ ]+ D3 t9 ^ D check-death8 C; i6 m2 K# C: s8 C7 @ d
regrow-grass B; a K3 y7 J
do-plots
7 E' P' A' D, ]" R; C4 Y4 {# Mend
2 C6 I1 |$ t% gto move-turtles
+ F( x2 i- v8 }6 X* o- _5 _) K& q ask turtles [8 ?7 D! D8 G2 q. Y
right random 360* U( ^# e% x6 T0 T; g6 Q
forward 1
7 O& |7 I+ l; [8 K set energy energy - 15 A/ S7 u# V0 v0 Y# D
]
; e( Y" K$ L- A0 q0 C, Bend
" r; l7 E" |) T* N u7 dto setup-patches3 U- F* n7 A5 R' z7 O9 o6 [
ask patches [ set pcolor green ]# K, A4 P# E( ?* L1 o F& m, ]
end/ r. Q! e# e" p3 q. P9 g7 E
to setup-turtles& s2 n0 V9 v3 @6 j& M
create-turtles 100( }! T# a7 D& P& |1 n
ask turtles [ setxy random-xcor random-ycor ]6 g% ]. ^6 q3 i
end7 u1 ^, _6 [+ N
to eat-grass
+ d, d1 T O/ u0 Y ask turtles [
9 ?$ a$ e; F7 g& Q* H if pcolor = green [6 P5 p0 r+ k8 K7 t) H- g% n
set pcolor black
- ]! G+ l- g# c; Q" R set energy (energy + 10)& t7 m; b6 o2 ]0 I+ R: j
]% E l& C1 e6 g4 j
ifelse show-energy?
( Z0 S7 \; f5 Z6 N( Q: x% ` [ set label energy ]
9 x' P. ?# D7 Z" o/ s [ set label "" ]
# F1 I1 k, m6 Q( i# K. H7 o ]
, |, H) Q! x6 j$ ^8 ^, s. Rend! ?8 O, r- a% W l- v! p
to reproduce
+ M' g6 ]& f* ?4 F( Y( R: r" |# f ^6 h ask turtles [
S# j$ |+ t0 g g5 q& s' }5 D* \ o if energy > 50 [: S8 ~0 {% Y! i1 I3 N4 b( s8 R
set energy energy - 50
1 T. J4 n3 k# w hatch 1 [ set energy 50 ] V, [4 `6 r* J9 O! J
]
: W7 M: a/ l. ?3 O' e ]9 [5 U8 }0 ~: e, @
end
3 e0 `$ y/ a2 F- O) xto check-death
3 f* b( n# e: v# w5 Q% m8 M5 ~ ask turtles [
9 ]+ u: m3 P% R* z* Z$ J if energy <= 0 [ die ]
. ^) F# I; f4 W$ s8 k5 n7 U ]
+ @/ u1 R- B2 Fend8 N' J" _1 l2 ~% \9 g# x
to regrow-grass* A% u9 l8 O+ x7 O
ask patches [
% Q% O1 l+ l9 _5 c& t) m9 {# Z. n if random 100 < 3 [ set pcolor green ]' N. l# b) m# x) O* t/ |
]
9 @+ l- x! T% Q9 E# I! vend
- g/ ]6 E5 m& K0 M* E- O/ D' ^3 V; W7 P& `to do-plots: r4 z: U8 s c- O# e2 H6 K. C
set-current-plot "Totals"3 l9 X! t5 O8 ~2 M
set-current-plot-pen "turtles"
) Q0 d: t$ o; Y+ ~1 V% ^ plot count turtles9 L' M5 N; P* g) ]
set-current-plot-pen "grass"
# ]1 J, I1 P7 E% b8 r% c- b4 x: i plot count patches with [pcolor = green]
2 I# U# G% J/ b4 t6 V; ?: }4 R, k* @end
8 P- Y. |( C9 i; I. \* g可是运行时提示no such plot: "Totals"2 I9 b/ x5 d. _0 J( r3 J
error while observer running SET-CURRENT-PLOT
% @$ X. R. ]1 e+ c) i5 n) V8 s$ S called by procedure DO-PLOTS s6 D- j' Z8 o- p# H Y
called by procedure SETUP
7 z9 T5 x! Q, k called by 按钮 'setup'
! M' r& s( X6 g# K% K6 B# Y求大神解答啊 |