我编的程序如下turtles-own [energy]1 j: N$ x$ x! B! N$ n. E
to setup3 F7 w4 ]3 x7 e. b+ Q
clear-all
- v4 r& N1 P$ L, u n7 Y- y" ` setup-patches
6 o2 K4 K, m" E2 W z+ a create-turtles 100
2 i- m; }! M A5 y5 U1 P do-plots
/ R( n' V* ]- N! d9 L. s ask turtles [ setxy random-xcor random-ycor ]
9 B, O# Y: n6 _* S* s* T4 a1 rend
. w$ u* M Y% k/ hto go& x; i% G, q. w0 S* w1 i, M6 y3 T
move-turtles
+ X+ }4 r: _+ v% O' V$ k; q# L eat-grass5 E1 S/ ~7 K& U+ ^' S" t6 f$ L) I
reproduce5 R) \" ^' V) E) {- P& T
check-death
9 O3 c8 B4 S4 @; ~; W regrow-grass
% k0 M8 m+ |; V _5 T do-plots
) G' I4 I( @8 c9 M" Lend2 d6 z+ Z3 w" G" W* g
to move-turtles
2 O+ I+ _* n* v/ K- r: `0 s& w9 S8 F ask turtles [
6 R) `$ C6 t) m1 k& T right random 360
1 u9 X5 o9 j) c) I4 n forward 1( q0 w( b( d7 e- @
set energy energy - 1$ o3 R7 J( }; [, R. r
]
6 M& t8 v. ?7 L3 G# \, p9 ]& Gend
8 @; J$ ]; g& N. }* e1 ~to setup-patches* m" y6 _ q' K# o0 n
ask patches [ set pcolor green ]
o& k; `4 T7 v Z. K! `. kend
; J ~, t; P$ U4 tto setup-turtles
+ p$ e& m$ n( o. u- T create-turtles 100, M' s3 a' p; _7 t8 y. A$ Z" n
ask turtles [ setxy random-xcor random-ycor ]
7 X0 z, C2 P3 Z, w4 ^8 } K* N/ c: Zend4 C z, Q( E( Y
to eat-grass
3 m/ T/ ]/ v* u, N# O ask turtles [
" P1 c, Y2 G/ v if pcolor = green [/ B* K7 {4 }! d9 ]8 S
set pcolor black
# r r- v4 \& o- h! a. W set energy (energy + 10)& |) G! ?0 ~. X! j
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ifelse show-energy?" r5 M" h+ o5 @- g5 j6 E: g( T' g- `- R0 Y
[ set label energy ]; L* o) h- ?1 e. E: Y1 s1 g; C* c
[ set label "" ]- L- x0 H) K8 J9 y
]% f* e3 q( H# F5 g2 j' ]1 {
end9 a! _) ^2 J3 A
to reproduce P: c( G/ o9 ]- X7 q4 W! Y2 O
ask turtles [- D# a) @! m. X, |9 L, R+ E+ B" w
if energy > 50 [
. j- f3 a& H, B/ ?, c: i- ~) v set energy energy - 50' ^; L0 u' B5 r/ e) U, H
hatch 1 [ set energy 50 ]
+ l$ Z: Z* |& ?/ D ]& m* p% s4 ~: a
]1 h( ]2 H4 q c9 z+ F
end4 }" e' h+ d# d$ K9 v
to check-death
4 S# k0 S/ J7 Q$ `1 i/ V: w/ ^ ask turtles [" a# N, Y! v# n% U7 D2 y6 n1 W; `
if energy <= 0 [ die ]
& O% y: j# i: E F9 g: ] ]
7 y! j6 @3 _1 U9 [7 n% M. \end9 A% h9 n! |$ n9 q6 `6 E/ f
to regrow-grass! y# O0 a5 F: @6 ~
ask patches [% [8 F# I I; J9 p" Z
if random 100 < 3 [ set pcolor green ]
, {& A( t: J' L9 y0 l4 U( A8 f ]
. L8 a C* k6 Q6 q# R: C" o; z/ ]# Wend1 M. B% R, m* j0 R# `: d+ }
to do-plots, w' \+ X! E- T( d
set-current-plot "Totals"- X4 b' I, l U, n3 f% ~! ?+ f2 _/ s
set-current-plot-pen "turtles"
# W) z' n2 o+ n, \ plot count turtles! @. p$ R$ t9 k5 h$ W* F4 }
set-current-plot-pen "grass"
; H1 J2 P9 Y9 K" g# h plot count patches with [pcolor = green]
4 |9 t$ O! g. D2 kend
2 x$ h( Q- u( [2 F. @8 P可是运行时提示no such plot: "Totals"
, j; J Z) L2 M; }error while observer running SET-CURRENT-PLOT/ C g0 j' T4 Z( \
called by procedure DO-PLOTS
! C; X% D; O% V: q4 p# j8 o called by procedure SETUP
: J2 e" p% k n+ |8 A5 n' T called by 按钮 'setup'. ^ s3 O( z/ |# q* p- ?
求大神解答啊 |