我编的程序如下turtles-own [energy] y9 i2 P2 ^& \ k( I- N
to setup
+ N9 J- y9 O* p. G( T2 S) Z clear-all
C) }+ J% n( a5 j: D7 R setup-patches& ]6 T- x: V. ~6 |1 E; }
create-turtles 100
4 [2 P- ?) w1 i do-plots
5 f: h3 p; n3 G/ F) ~8 r ask turtles [ setxy random-xcor random-ycor ]; h5 ~. G; M& m4 } C
end4 r: J* v( s1 K, W5 [
to go* K0 U- V( L# Q1 J& V: F" T$ @
move-turtles
8 r& \, h& d. a3 G. N3 q | eat-grass
o. V9 ^3 Q$ H, ?, ] reproduce
$ R9 t! z a* Q( W check-death( Y1 }8 b1 Q( X6 n" l/ h. }% ~
regrow-grass
+ L/ Y; X$ H/ _& y; U do-plots8 A- ~% s& n h
end
% _- e6 M9 t+ M8 j9 y( B9 Oto move-turtles
9 b1 @1 j5 z, b ask turtles [
6 B7 r8 J( p1 w6 Y/ U right random 360
5 J2 ?# [, H3 i4 Z forward 1( w) C, s ^+ c* l4 K8 }1 q
set energy energy - 1! r8 B0 W- w I/ l; n8 d
]
C( M w$ c& n0 Nend; U3 n2 a* X% W {, ^
to setup-patches
! M( i+ i* ` U# g* C7 G ask patches [ set pcolor green ]0 Q& }+ k9 z6 n: |/ D
end! P) |& v% ?$ H2 [
to setup-turtles
; E3 @9 |- T( G; x: Q0 g9 I create-turtles 100
. X2 C4 q; i, R* a6 w' Q ask turtles [ setxy random-xcor random-ycor ]# n G7 r+ c! r/ c R) o- R
end! C- D, t) j4 A' _9 {
to eat-grass
1 v- V6 V* ^7 |5 w' B' t ask turtles [8 A6 B% h. R' \$ Y/ \9 S0 Q: A
if pcolor = green [
6 ]& p' S, b7 T% s" A$ c set pcolor black {9 d8 `5 G% g* A& j, R
set energy (energy + 10)
% c% g0 y [6 O' q3 ^ ]
2 p$ V9 h4 ?: y2 ` ifelse show-energy?
3 b/ j) f- P' _/ O [ set label energy ]
7 j# @. ^0 Z8 L: W$ |- s7 m7 a [ set label "" ]! h5 t/ P9 T7 Y
], [4 Q4 Y, u- m1 a4 y0 U# [& G
end
. b& q: b/ F+ m$ g* U% ?8 M' dto reproduce- v9 y( F% D; @+ r( g) I$ L3 i1 ]
ask turtles [0 g2 p0 X8 X# Q& m% t \/ Y( V
if energy > 50 [
+ B1 k+ e$ M. ^. ?3 i set energy energy - 50! F. G' n$ G/ ~, u/ K
hatch 1 [ set energy 50 ]
% T! ]8 [7 y" i4 E" m* L# V: I ]/ c' o3 O- }- q d$ {+ B' ~1 i* T
], a y5 ]9 j' S9 g% Q
end
0 T: t5 q/ K. ^) A1 `0 h% ato check-death
7 Q; I+ r$ Q0 j3 `2 @6 x. P+ X ask turtles [- s2 t# T3 O$ }
if energy <= 0 [ die ]
- K, n) ?1 M. m0 o ]- x" w8 y, X7 {1 ?4 O: p3 F2 p
end! [$ y3 w# F# Q; u) C
to regrow-grass3 ^5 M$ p9 O9 u5 n$ f
ask patches [* w7 a6 h/ K2 w7 q& }2 W
if random 100 < 3 [ set pcolor green ]
- ?9 Q& E+ y- J8 Q0 }; P+ | ]
% ?4 ^0 L4 M5 E$ a. @! aend
* p" b L) U$ O' k$ Q6 Ito do-plots
. V% @/ G9 p+ m5 w$ u set-current-plot "Totals"
% z1 c, k5 w3 E# E set-current-plot-pen "turtles"
R8 D0 l4 R; Q plot count turtles1 R: F0 w* v* T
set-current-plot-pen "grass"& f* \: J) g; f* I9 e
plot count patches with [pcolor = green]
2 N; N6 f' |* A' L. B8 n! Xend3 [, a# n5 c" j# e3 B* C4 V B
可是运行时提示no such plot: "Totals"( f, x c1 W8 y, C6 f4 Q
error while observer running SET-CURRENT-PLOT3 y* O, p0 m0 _; S
called by procedure DO-PLOTS
& X& T, C1 g1 H called by procedure SETUP- e1 I* ^8 B4 T2 C+ H, U' n
called by 按钮 'setup'
$ A" `/ n( W7 P+ W7 i求大神解答啊 |