我编的程序如下turtles-own [energy]6 E6 Q7 p0 B, ~3 ]+ G
to setup
0 H0 h% m# P" y- i0 K" t0 n- v clear-all
$ A9 g8 e. e/ a setup-patches. I* P, f3 L% `% i& w
create-turtles 100
: L9 v* \) W5 _) `7 _4 q do-plots
\! r" C4 C- A4 J- J4 S% q* {5 n ask turtles [ setxy random-xcor random-ycor ]+ d5 S- J, V/ k6 B7 h( S6 n
end
, C" N- f! `+ t! n! Z% n$ i& M2 nto go% ~$ ? L( p, U# `" t
move-turtles A, W) K' w% ]" {, p
eat-grass
, u, m8 ~/ `7 h* {0 v reproduce
. M9 R8 M: v( p2 n0 C check-death
, }! T* P- m" ^: `5 c regrow-grass4 P, M/ W, Z# x6 D4 h, m
do-plots
4 V; ^% [- S9 m% mend, x. T4 F, I7 l
to move-turtles) k X! m* k" a: I M7 i: P( _
ask turtles [
7 p: k/ r- r$ X/ I right random 360( f1 {8 k: n7 ~, ]
forward 1! z- @) Y% @. h2 T" e9 G9 I0 [8 P: j) [
set energy energy - 1
: Q8 `( _8 Y$ Z# M ]5 k! @0 Y. Z% t" O. e- ^& k: X/ Q
end+ V- s; G; h5 s
to setup-patches
0 Y* N. m8 c9 i& X, d ask patches [ set pcolor green ]
0 J6 _9 c8 W0 [* eend
; A: h* K( a1 C2 E: s$ p) Tto setup-turtles9 c2 R7 g3 _# ^. y+ F' q: t
create-turtles 100
7 E, T- @: z: e, g8 W' \ ask turtles [ setxy random-xcor random-ycor ]
* K6 W$ Y) n2 Z5 t2 A- @ S* T3 Aend
6 p' y# J, w' @$ w2 fto eat-grass @) W2 @) s- [% @: m1 I
ask turtles [
+ \( D2 V' E+ Q if pcolor = green [8 X4 ]% C7 Y. {# f- E
set pcolor black
& e! @1 F& m; L0 a. |; _& N set energy (energy + 10)
3 [0 @. A& ^/ d2 r1 `) | ]
9 a* P1 i3 X* y- k/ j' l7 s: v6 q ifelse show-energy?
' y1 [ m* Q3 F y3 E( E+ { [ set label energy ]. {* e+ C M5 u# P9 R3 g! r
[ set label "" ]
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end
! \* k) x, K' E9 qto reproduce
/ _# z! a1 N g+ F6 g" s0 R ask turtles [) s9 D; k3 D6 z. P. o. r# K' R% H
if energy > 50 [% J9 o0 x& s8 n$ ]# m
set energy energy - 50' R: T# O, A, B' @- p- h, s
hatch 1 [ set energy 50 ]) g& a, m4 p6 Y% F/ B5 p) j- d0 S
]5 e$ x$ {- \- e$ R4 ?5 ~* i ]
]
4 v& X& h7 A f# J# K+ Mend. N; W. Q9 x% r5 F; `
to check-death* k* b0 e7 n: O
ask turtles [
& e! J+ d. r# B; Y: t6 _, } if energy <= 0 [ die ]- i- C# ?0 \0 F
]" B" j' J Q+ K, F: n% o1 ]3 ?" z2 w% z
end
0 B/ K4 m8 Y0 y2 k' u& ato regrow-grass
1 ?" t* X& s7 K ask patches [" ?# B- ? k3 A' l1 x3 ?
if random 100 < 3 [ set pcolor green ]2 I8 u& y/ W: W
]
8 X, E$ v, `' L e( l5 H! eend
7 }) B$ b4 k U5 I' rto do-plots+ L( }) d8 W9 z2 y- E6 ^% |
set-current-plot "Totals"- r" C. c, X$ k0 _. A0 G
set-current-plot-pen "turtles"
2 n( P i# `& F plot count turtles$ G9 E4 [7 w/ k9 K8 ?
set-current-plot-pen "grass"
5 G/ x4 m& z; m8 ]' S plot count patches with [pcolor = green]
4 X5 V: i: M7 ^. A% _2 u% O J7 eend
% m# B/ v6 U/ n* R l' \9 O可是运行时提示no such plot: "Totals"4 m0 n' g0 U7 p! a) G- _
error while observer running SET-CURRENT-PLOT
) l! }& I. K. b* o! w1 Z; a$ \! z% c called by procedure DO-PLOTS1 i% ?/ |/ r1 ]8 k/ ~0 j1 Y
called by procedure SETUP% }, a/ n: Z& j9 ^9 E
called by 按钮 'setup'
% W3 e7 S7 J- R9 n& g: V( x" X求大神解答啊 |