我编的程序如下turtles-own [energy]! k- {6 @: E7 I, t
to setup
& Y) i: n) Q4 K$ J' m clear-all. g9 s8 }/ o& H$ |
setup-patches; B+ o% |* q' w v! M; G1 A8 j# G
create-turtles 100; s3 p4 N [/ l1 G3 s( M( V
do-plots
4 P/ b' t5 a( a0 V ask turtles [ setxy random-xcor random-ycor ]2 e: \- V: i. b) l8 F6 _3 B
end7 B4 ]3 n7 ?7 Q' r
to go1 Y3 ~) X8 I0 v- d/ D
move-turtles5 D9 W3 f; x# Z b4 P% P
eat-grass8 M W n/ i3 o8 J* i5 |7 D9 D
reproduce9 |& C- }1 U0 h7 ~
check-death2 p. o0 d1 H7 \7 i3 i# [ }
regrow-grass9 Y: R* }+ Q3 L9 n' i# J
do-plots. l# u6 @, {& d) S$ v& a
end
) n) q8 A& R. Y2 ?0 ]4 h) x& _, v! Wto move-turtles4 P& P6 N. C2 P5 x
ask turtles [8 X% ~% m+ `7 K
right random 3604 g+ U$ F, m9 T# N9 L- f6 a( `
forward 1! b6 D' O% g8 G5 U$ o* R$ {
set energy energy - 1
1 w w' n: m4 q/ Y' K# J ]
- V) G5 f! F: p* T8 J Qend. U6 p* I' l0 C! `' P
to setup-patches4 I2 v, Z& q: c- _ R' e- M0 `" e
ask patches [ set pcolor green ]2 e/ \: K( ]" Z9 T
end+ ^- N( O7 Y6 L& U; W
to setup-turtles h6 b5 t+ L. ^
create-turtles 100) ~+ F" d9 g3 i" a1 T2 G
ask turtles [ setxy random-xcor random-ycor ]
- D$ P) ^; Y# c' A4 I1 R6 m; Yend
0 C( s7 K* \% o# w0 D" V% @to eat-grass4 j, u+ t1 D- A3 `7 R
ask turtles [
0 b9 b+ M+ o5 q if pcolor = green [
. v' P) j3 k0 p0 H! X set pcolor black
& p# N! J, ?/ U6 e set energy (energy + 10)
9 q2 v1 j: r5 f( i- }: F) y ]
- n7 k" E+ ], w+ \% y ifelse show-energy?' [" ^! W0 W/ O/ |! x
[ set label energy ]3 K; S; B3 x' ^! k3 m
[ set label "" ]
/ O& N; w: J' [% T. {; Y ]' q( P% O: X; |. B, v' G
end
9 B' H7 l/ J: e6 eto reproduce
* w5 w% B! {3 z. k ask turtles [
- u! }8 t( Z7 t4 v! i if energy > 50 [
+ P# d/ x, x% O. i7 X- n; ] set energy energy - 50$ \' R1 r& r" V& O2 F [
hatch 1 [ set energy 50 ]: C; u# Z$ @1 Z, F, f1 ]! x5 s
]
/ {* K( `8 l+ D# C; I$ M- L# F2 B/ c ]
; ^# t! C, {. \4 k- J. nend
) u9 R* O* K9 O: wto check-death
- m; O0 ^+ e$ d, ], ]* \- n3 e ask turtles [5 t- O; \+ K! W: `8 U
if energy <= 0 [ die ]2 \1 ^) C% @4 I$ ^0 K
]
; \$ B& D3 A9 [# Iend! ~8 r) @8 Q- S& A
to regrow-grass
8 L6 S0 b( K6 {6 { ~0 F8 ^2 S ask patches [
4 Y4 l1 p% w+ {1 n0 ? if random 100 < 3 [ set pcolor green ]' L0 {4 d. g9 C- {3 m4 s3 @8 \
]
1 K0 Y( }% s" B$ Q$ Xend
+ o5 M# _1 A$ o& m, ]to do-plots+ E% u$ f5 O8 I, |( T. X
set-current-plot "Totals"
0 @# V' j5 ~( M9 @8 } set-current-plot-pen "turtles"1 ^0 H7 @$ |1 @; y: {, J
plot count turtles
2 [: @& m4 B8 p set-current-plot-pen "grass"+ J! b6 x8 v/ ]$ B {
plot count patches with [pcolor = green]
, i9 h" H; {3 ~- v! S2 q3 T! y3 lend. j! P$ {6 x ^# Z* x5 _9 S; s7 q" R
可是运行时提示no such plot: "Totals"6 x" S U; [; T2 Y+ F1 B! D. g
error while observer running SET-CURRENT-PLOT" p# m2 q' x+ f6 S8 y a X% U) _" p
called by procedure DO-PLOTS
" i" C8 H9 P) a9 T" \% X9 X called by procedure SETUP7 G2 s Z- H) d: e W* y' ]) g- ?; {
called by 按钮 'setup'$ b4 T7 F" O; k' s; o
求大神解答啊 |