我编的程序如下turtles-own [energy]. ? Q1 U" J3 k+ ?2 x. ~+ F; L
to setup, j" U# y# r7 j+ @9 G$ X
clear-all
6 `8 ]7 A- D7 `0 A0 | n setup-patches6 I9 J6 g8 k4 c- Z; H
create-turtles 100: ~2 p$ c6 V+ y8 {: ?2 a
do-plots+ H. _+ \0 O, ?$ J4 _
ask turtles [ setxy random-xcor random-ycor ]; x2 u4 p; L: z: n1 A/ {* f6 @
end
, i- o, p1 t( e$ I' D' g+ Nto go
( t3 k! _: R1 N move-turtles: s8 d1 x' B) |6 l2 c
eat-grass
, \6 F# |/ d0 H) W u/ v( u" V. S+ z$ Y4 U reproduce1 y% }, J9 p! S' L: Z
check-death" {- T2 P4 z; F5 c
regrow-grass( C2 F) |. {4 e5 v- Z7 K1 h
do-plots
4 R, L; p9 W9 U: h$ ]end
, b" A& I6 u. }/ wto move-turtles
( G7 e; u3 D0 _6 I ask turtles [* N. ^0 Y" i: P0 u' G( p
right random 360
+ Y$ j. u0 c1 ` forward 1
) n) N. n7 ~/ d0 Z5 C set energy energy - 10 g" Q8 m T7 P8 B% ?" q
]( b9 R8 X1 a6 l7 M$ f! W9 q
end
' `( n+ d4 P2 [6 f* Sto setup-patches
+ {+ ], T$ y' I5 b, Q' k! `: X( O ask patches [ set pcolor green ]+ r1 s- q* Q1 S, @2 l
end
& w v0 _; |# S0 J# P1 Cto setup-turtles
8 E5 p0 h/ ^3 d9 l. c6 S! Y create-turtles 100
, E) {& G' y/ G" H ask turtles [ setxy random-xcor random-ycor ]
+ m# Z" R% n6 |$ V8 j: X6 mend
& {- y2 u4 q' z: I6 H! ]to eat-grass
( E- j- E2 {1 f. w9 W( _7 [' A; _ ask turtles [5 ` s3 O' U" B3 W: N; t
if pcolor = green [
# D, G9 Q+ ?0 g+ p7 f S! U- } set pcolor black
7 c+ g- z- s0 Y4 b9 v set energy (energy + 10)2 a/ w2 K. r$ a& k
]2 e. T! ?9 Q( m. L8 G' c. Z
ifelse show-energy?
9 ?4 t) |- I1 Q( M ?4 I [ set label energy ]9 t j: T u; i' T1 n$ j8 P! o0 l
[ set label "" ]. ]5 Z5 v' N3 f/ {2 j1 R1 {: X& |$ J
]
7 c0 A: W8 T) m/ i$ m0 e5 o Gend
1 s: r9 ~. C3 P" Gto reproduce, x4 ~( W6 {: u' w( C4 }$ x8 s, |' R
ask turtles [
, f4 L# [( z3 t2 Q1 k: M3 i if energy > 50 [
% H- K7 q4 Y1 t* U set energy energy - 50% g) ]' v% m$ \- {
hatch 1 [ set energy 50 ]
- K! \" r/ q) u( @. x ]$ P# i3 A& S8 ?
]0 G4 M+ |7 c2 g" j9 F3 m
end
; s6 v, P4 @3 J* jto check-death
+ N. m6 ?# P! I0 D, f. E) Q5 `; z ask turtles [
2 t6 R" \# e2 d2 i9 N7 i; J if energy <= 0 [ die ], o6 p0 `* E, N# V) u8 Z$ u( S
]2 \& g+ O/ m5 r/ r, ?) O) z& |
end" \5 ^/ q* c. E7 v2 {- }* @* U$ w
to regrow-grass
( ^; o9 g( U- I5 w3 i ask patches [
, ]- D; b5 q5 v. C8 m* {( f, k if random 100 < 3 [ set pcolor green ]
' Z7 t* f$ h) m) \( g6 S ]% J, |# C' i* k/ k
end
, k! z# F4 W- y% P3 o: B+ Oto do-plots
! E6 n: ?! C6 z7 D set-current-plot "Totals"
* D+ b, |* x; f; A7 Z set-current-plot-pen "turtles"
9 _) l8 b) L- H6 Z T$ W plot count turtles6 G6 M6 L+ a7 h# T I! W5 L0 k, c$ E
set-current-plot-pen "grass"$ y" \* A* O2 a) N! \
plot count patches with [pcolor = green]
% B- D; v8 T7 Q q& z" E/ \end
. `4 R( o: z/ L8 X: A可是运行时提示no such plot: "Totals"/ \1 b0 N' C1 G
error while observer running SET-CURRENT-PLOT3 a8 `; A, }) \
called by procedure DO-PLOTS/ b# D( A1 \* D) B0 @
called by procedure SETUP
" d; K2 l7 L% w; d called by 按钮 'setup'# ^+ Y* S& C. f: y3 Y
求大神解答啊 |