我编的程序如下turtles-own [energy]+ [1 l O8 o2 u& y/ i
to setup$ Q- ]" \ _2 o+ \ ~
clear-all# X ~' M7 F5 D7 q ^
setup-patches
9 K# v' D1 O2 o create-turtles 100
% T5 U5 O% |% P) d do-plots
; M6 I5 e; c7 t: Z. [% x ask turtles [ setxy random-xcor random-ycor ]8 R* ^5 n9 Z0 M, ?
end: G2 J! G6 E% ~
to go
; Y5 x6 d7 p5 _$ l3 O9 K8 l C move-turtles! M. U, ~' s, y
eat-grass
3 t: b8 F( Y- I C9 n7 w reproduce
* d0 ]# X- n2 B: ^2 H' z9 f check-death
& w4 V- i' `) l0 b( u" m! [; b3 h regrow-grass0 L* Y, p8 `- k, ~& ^8 @* }7 @( T
do-plots
- \% G/ U2 W; Z6 {- n; ?end
d! p M$ y7 r2 P; Vto move-turtles0 m% u% X& L1 n$ ]# g! e
ask turtles [
9 u9 ]# x! L/ C7 h5 d% }7 a right random 360
9 q) G2 v. @, J# e: n4 n forward 1
3 t. g+ n+ F2 y+ ?6 O set energy energy - 1
V' G! Q1 M* g8 M! p ]. {8 r3 D! V. C h$ y
end
7 r" F( s; v7 X. \) L7 Eto setup-patches
. B( S. l! M6 V+ N ask patches [ set pcolor green ]+ @1 A* d6 b* X1 Q, M4 {+ A
end
" `) [6 J# z4 v9 M( ^" Dto setup-turtles
" i3 O0 Y5 Z& \$ H) v( y create-turtles 100
+ K: P: }7 n- W( ~8 Q: t- } ask turtles [ setxy random-xcor random-ycor ]
/ P! W$ U, @ J8 k% Q+ {/ Dend0 f8 d k+ j6 h$ c! q9 P
to eat-grass2 C' H. m) H3 P! B x! S4 B
ask turtles [' {* A4 b- Z3 M" {* Z
if pcolor = green [
, b: Z9 ^' i. q, ] set pcolor black
* ]3 Q+ |9 f2 b, T/ m set energy (energy + 10): F1 a& M7 Q6 i4 w7 }
]1 o+ w! q( u& K( \5 x6 M
ifelse show-energy?
3 K- d9 T5 j- [, L- G [ set label energy ]( q: ^9 i0 \% z, W2 d) i5 I7 {
[ set label "" ]
- s0 y# p: }$ j! e9 H; w& W4 W ]. U, t# ?0 u+ i% z( h' B) b8 }' Z
end5 }% ~. x }2 N# H7 a2 }" r
to reproduce
9 [* E0 T- t- [: a' L( ] ask turtles [, E0 D( H7 X' J, R
if energy > 50 [5 o1 c9 }/ T8 e# |' s+ A0 L
set energy energy - 50
" |0 b7 j9 H& D& Z hatch 1 [ set energy 50 ]7 Z/ [' B+ }# S+ e! s& [
]
+ u. |* q) J* _0 b ]! W) ~; x. S! Z1 J
end% M' Z" \* w, F8 P9 \# k+ x( F$ _
to check-death* F& C( b+ |' ^: ?4 j
ask turtles [/ z( [ ^& @/ Q$ J8 t
if energy <= 0 [ die ], ^4 l. Y* m2 L. _( h- y
]
% p! E" ^: @$ h* \& Z2 j vend- [) \( z+ R* C% g% L; j
to regrow-grass
( h# j' A- g* z& r7 x ask patches [
' ^" V; I' x( x& u) o. D if random 100 < 3 [ set pcolor green ]
" E& ?6 V8 u& H/ h3 z ]
^9 o, I" Y* w1 Dend
$ K9 l$ D0 N, S0 @* v' H v" o9 Yto do-plots
( _: D0 C" R5 c8 I/ w% T set-current-plot "Totals"
' u( B E/ H4 Q* Q1 z set-current-plot-pen "turtles"
6 F4 m3 Z$ U+ J3 f( B plot count turtles2 o* B& S: o% d# Z, {
set-current-plot-pen "grass"' `/ J4 a6 M2 F! y) _! R# t+ `9 u
plot count patches with [pcolor = green]
% Q: H! O6 U* Wend
* t+ Z6 @$ I% e8 g5 y可是运行时提示no such plot: "Totals": N1 C9 t7 U4 f% X6 D5 K2 p4 @4 Q; W
error while observer running SET-CURRENT-PLOT( h7 J3 i/ H1 Q& f V0 @
called by procedure DO-PLOTS
% s4 a( _5 H9 V# V called by procedure SETUP3 i; n, r2 T: `6 U- R) u" D
called by 按钮 'setup'
/ ~! Y+ H$ K2 A T3 O求大神解答啊 |