我编的程序如下turtles-own [energy]
/ W; n0 o4 L9 @3 ?, n! X3 Rto setup. g+ S/ ~3 _2 h; {7 Z
clear-all2 M& w7 p0 v+ I3 [
setup-patches
& Z; g g( g' X& T( g5 r create-turtles 1003 W$ p9 p6 h( ^
do-plots
/ {0 P t7 R/ `- k) j ask turtles [ setxy random-xcor random-ycor ]' r3 e B/ ^. B+ m+ j9 e. ?+ K
end
% J) K8 g' e. N$ l, [" U+ Xto go
8 l7 W9 N7 q. x! Y- g+ n move-turtles) L, b" t* K* ]7 S
eat-grass' l1 s8 [5 n' ^, t8 G
reproduce6 z7 `7 K+ G' x( ?/ j, s q
check-death+ i7 K+ b- h* w2 ^
regrow-grass
# p9 q% c, p: x& U. F$ |; N do-plots
s- @9 i% b% _: s4 X$ hend. D6 Z; y7 }8 X* U2 N' t$ t' n# y
to move-turtles' I) ^/ S M$ D3 b$ s
ask turtles [
1 r; V- p5 g. x1 l7 W right random 360
6 [2 A/ s7 h9 I0 t+ U/ M. ~ forward 1+ W2 z, m5 s8 k) @
set energy energy - 18 j& q. e; k& l8 Y7 r2 E$ C2 {9 L( J' t
]) R7 \: `+ d0 g& K, H6 g, k
end# L6 j) ^0 R3 {; |
to setup-patches
0 X8 T% e p, K. V. |& ~ ask patches [ set pcolor green ]1 L6 }$ W( p: Z) V2 ?
end
4 n0 D# G0 t. B: J. fto setup-turtles+ ^' D e7 N& R
create-turtles 100& X3 t3 G, S9 H( h
ask turtles [ setxy random-xcor random-ycor ]
: H* l0 w2 U* Tend# e7 Y$ W; U# J" d# j
to eat-grass
, G! \7 R# X9 r2 Q5 w. c ask turtles [: Z/ B0 |: C; b' Y. V2 S. X
if pcolor = green [1 r2 e" W* D; }& A1 k* D
set pcolor black
7 V& A7 ^; H9 k/ @; O. H3 C set energy (energy + 10)3 E& @ o0 G7 r5 A L( c
]3 @$ T) W, |8 V7 g) b& a
ifelse show-energy?8 C. ^$ i; [7 F& x
[ set label energy ]
8 g% I' r/ P7 ~ Y' m$ a- L% m4 o [ set label "" ]; a5 h1 z8 y& f6 ~8 _" `
]
+ Q# t: l, M/ W send& o' O9 O2 t( e4 N5 @9 v
to reproduce# Z; Y7 P5 l: h: u6 w
ask turtles [
9 y6 h) K% x& o: P1 J if energy > 50 [
9 c8 e; V3 H; @1 n3 R1 D5 C2 G6 A set energy energy - 50
9 [3 n, a3 }, ^; E! J7 @- {: W: w+ h( b hatch 1 [ set energy 50 ]
3 j0 b8 C! L2 l* S ]! F( \; D. F. G) }1 n
]. p+ A0 S; P ?2 i
end& b' `! f- K5 N8 c6 M
to check-death6 d7 f7 p5 z- l$ j9 `! I7 M9 b+ q
ask turtles [! |+ p- B* B5 t& b: K
if energy <= 0 [ die ]3 j! Y6 {0 z3 L+ ~% k
]
. _$ d+ Y! [% i0 ?% ^0 } Gend
- v2 G$ V3 B7 e. {8 R2 Wto regrow-grass; }# W% V" Z; \4 a
ask patches [
, ?$ I* i) o- ^1 D if random 100 < 3 [ set pcolor green ]
: l: `; T4 V% T ]7 T$ ^$ b& |' {) F; [/ n, A
end
3 D7 g& d, d0 F7 D! R9 @to do-plots' B/ A& M" T; C+ [5 I
set-current-plot "Totals"
( R! O# J; R7 a6 \, ` set-current-plot-pen "turtles"
7 X0 m6 A8 l* G plot count turtles: g# i( I3 Y9 e5 ? O# r
set-current-plot-pen "grass"5 f0 i- ^* l( ?: {/ ?; r+ N
plot count patches with [pcolor = green]/ o' J8 d5 I/ L( I5 }2 `0 r
end8 ], d0 \3 o6 x c' ~5 b- y+ t
可是运行时提示no such plot: "Totals"& D2 v: ?- i! @. o+ o( k( R
error while observer running SET-CURRENT-PLOT/ m; V7 C- [* h* r! s6 k3 I% U2 M
called by procedure DO-PLOTS1 s+ v! h7 ?" r$ b
called by procedure SETUP
+ Y) O0 S' o& s8 A- w called by 按钮 'setup', z* P5 ~+ I' h3 b: c; n! T! ^
求大神解答啊 |