我编的程序如下turtles-own [energy]
7 J& Q! X- q! D) @to setup6 @ n3 M# A2 w$ S/ S
clear-all
, s$ Z' c: @" d setup-patches' A3 b% l9 b5 n) R; ~6 P
create-turtles 100
8 V/ Q" g: m, g* g0 M& |; n do-plots
8 C1 `( T+ }7 M: v6 x% I4 n" M ask turtles [ setxy random-xcor random-ycor ]. n" i1 T0 T& S0 y2 \! t
end$ [* y; N1 n1 y% k' [
to go+ B8 C$ A t9 T2 c, `
move-turtles
+ H5 I+ a1 s4 ` eat-grass5 z# J& C: i) o
reproduce
; Q( f* l% q( O4 x& k e1 M check-death
+ \# [: _" L- _ regrow-grass8 T: e$ {7 |9 B& _
do-plots p: h2 T0 |6 C
end
8 k; t3 Q4 U8 E9 V# Qto move-turtles
6 V7 R6 G# h _. S2 {- l+ |( ] ask turtles [
9 e2 ^9 _* o+ Q8 }7 { right random 360+ D. r% @! o) D; Q, i! @+ V
forward 1
8 p' Y0 t# q; I, O3 w+ N set energy energy - 10 m2 ~( V: Y7 K: v! T$ h, x: ]! ?
]
+ u: c, K6 f% l5 |1 @end
, x$ J+ q) P" @4 O9 Xto setup-patches3 Q0 M# q/ ], q: b4 h* s# H
ask patches [ set pcolor green ]
# n- R2 n- U" R+ A+ j5 mend
5 ~8 G: J+ e( Y9 Bto setup-turtles
: S1 B2 V5 ?- \9 M$ ?7 ~ create-turtles 100
. t2 s9 ~5 W% i2 q! b1 e9 ? r* `! ` ask turtles [ setxy random-xcor random-ycor ]
5 n$ P" }; S' [( c( m4 n( T& hend3 j; d: h) B. y2 P& K; s* s
to eat-grass3 M6 e5 D' o$ `
ask turtles [- G5 m/ Q" A: K/ R, p# L! B
if pcolor = green [1 r8 q# t! @6 X9 Y6 |+ Z
set pcolor black) h* y9 [- o7 |/ ]1 Q
set energy (energy + 10)
" b8 _/ Y1 P; |9 p ]
# E; A J4 r4 J- z- g3 p ifelse show-energy?
( p3 x# B; d8 b% k0 E1 a6 E [ set label energy ]$ t, x; Q+ u! D7 { g1 n
[ set label "" ]
, w$ K/ j" L ?2 V5 I ]3 e2 L: |6 P% e7 `' d
end/ \7 d( ]9 f, a9 ~
to reproduce0 z, H, o- Q( ]9 g
ask turtles [
5 M- n3 O2 n/ I8 W! v if energy > 50 [; Y% Z/ v9 p6 M! ^6 T0 }. Q
set energy energy - 50
7 C8 Z+ h8 W2 { f hatch 1 [ set energy 50 ]
$ r/ I/ z- S9 N! [+ b) \ ], R4 \' s W- I' o2 O* X/ ]6 M/ F
]
- ~# s/ @9 z' E% r. P9 Yend
: N. a5 a, `& D6 q% S2 Dto check-death
9 x2 R- O- g% ?$ n" R ask turtles [2 D6 P" B7 |" Y h" |3 R6 g
if energy <= 0 [ die ]: O7 V0 C' o: W3 |/ R
]
; U$ d0 d1 D: n; I; V, Nend* |- n A& ~2 W. P
to regrow-grass4 m) ~6 ^7 |& C5 S: l
ask patches [! C# C( }7 L7 l8 R7 o& Z/ a
if random 100 < 3 [ set pcolor green ]- w5 f; _2 N7 P' x. e
]+ w# k# O! @' b" d6 x+ l! w
end
: ~9 D$ h! ]: J, b$ q- u Zto do-plots) {6 p3 n, N5 @* B% n- V5 A/ q
set-current-plot "Totals"
% X# u9 d! P+ a+ c6 V# ?$ j set-current-plot-pen "turtles"
. e9 Z6 j: j7 P4 R plot count turtles
% D; r3 \1 l3 @2 \ set-current-plot-pen "grass"& F3 ]. U7 j% @! v
plot count patches with [pcolor = green]& ^% I6 [+ U$ t- \1 O5 ~ z
end7 m* R! q4 u% z8 r
可是运行时提示no such plot: "Totals"
7 i# s1 W( m0 T' s serror while observer running SET-CURRENT-PLOT) }& R3 ~1 r3 s- @
called by procedure DO-PLOTS
- f3 m8 T0 E7 M: X! o called by procedure SETUP) u$ l0 v2 E; l) i& Z
called by 按钮 'setup'4 R" y( C0 Z9 s9 m8 p4 o
求大神解答啊 |