我编的程序如下turtles-own [energy]8 J% b. ?/ _. s& k, ?) x
to setup
1 V2 O L2 e, j h clear-all8 C+ v( D1 b' Y9 [& L, o7 X
setup-patches# H2 I! c3 d# R k4 i& D
create-turtles 100
0 `4 U0 I |* ~7 w do-plots% ~3 z V) A8 t; s+ H5 n4 ^. x
ask turtles [ setxy random-xcor random-ycor ]
" X y3 w2 Z/ p! O4 Vend: l) [" y* t9 D$ E' k6 J0 [
to go
) D7 ?5 Z6 G Q1 `4 g& D move-turtles0 B D# H5 ?1 a- [' S9 _- @- r. c ?
eat-grass
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check-death$ j8 J! F# H9 |
regrow-grass
9 i6 P+ k' e/ O- w# p: C do-plots
7 {+ W5 b% C: x" Vend. c. H' l- ?# O6 V: ?
to move-turtles; n3 g/ l I- q0 l( R3 t( R
ask turtles [
) B7 i! d, q* D7 [: I right random 360 N5 d8 q% n2 s. m! d
forward 1& e6 f- J4 V0 ?
set energy energy - 1
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2 c' |+ w, {7 Gend
9 \* V j0 w( k; q9 kto setup-patches# ^- r) s! O) z2 K2 a& e
ask patches [ set pcolor green ]
1 ^% |- w4 j7 K( |/ {- qend
3 H1 t' E: b S% P% yto setup-turtles
( z7 {# ~! k6 X9 q3 P0 |; V0 | create-turtles 1005 B1 u; m0 h* N9 s! |: f( E* L, T; i
ask turtles [ setxy random-xcor random-ycor ]
* ?0 f& j z4 Vend
: [9 g0 W- o9 pto eat-grass5 l* w2 o, ]3 ]
ask turtles [7 o0 F1 d0 q& w5 G1 d
if pcolor = green [& h( I& F* R9 H0 Z, _
set pcolor black
& z8 @6 l/ r: k, t. G% F set energy (energy + 10)) _; @ g8 H( [
]
' |1 j2 ~4 P/ m' T8 h ifelse show-energy?
! v7 q! y# S5 z A1 \& l [ set label energy ]
3 s% W6 o B3 z# T, I [ set label "" ]
( X. j; R, g2 f9 @% f ]
4 [; \0 C0 o- Uend
& g/ q; F8 V7 U' p1 Y. A9 v4 `to reproduce
9 `, z* `6 Z8 I. O4 G; f8 X8 O ask turtles [" {1 u. }: C8 w: `3 o$ Y
if energy > 50 [6 | b4 Z* o$ h
set energy energy - 50
/ R- q6 G4 M ]. C* X0 U2 N hatch 1 [ set energy 50 ]
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; }2 J$ S. H/ K0 R" w% L ]
5 S- `6 k/ k) z9 _end& Q7 D2 {' Q% t0 s: [( n* y5 S! S
to check-death
& N$ ~( p. ]2 b4 I ask turtles [" o9 o: s0 h2 O1 z, M% m
if energy <= 0 [ die ]
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end* f$ ~* H) n, X* `. ]- b
to regrow-grass# e/ b( \3 K1 U4 [: h( }
ask patches [, r6 k9 @2 `6 j& ]: F
if random 100 < 3 [ set pcolor green ]/ E k1 _% A5 w8 A2 ?0 N( b4 x3 i
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end
6 Y) l" o: W# I" ^to do-plots
% ?' L7 j2 j# c* c8 P, b: p2 p set-current-plot "Totals"! C8 ^+ W' y$ F/ ]# H. G4 k
set-current-plot-pen "turtles"
+ `; `# l2 w) V/ c* [+ ]" D' ?1 n plot count turtles4 k w) U" s* d l; Z$ [
set-current-plot-pen "grass"
( q. z' E& G F; E; j% N% v plot count patches with [pcolor = green]
/ m: y, I+ G: s! z# d: jend
! u; r, a! V2 x可是运行时提示no such plot: "Totals"4 L6 l$ Y' s* S" A( u5 C- q
error while observer running SET-CURRENT-PLOT
( \* V' g7 a5 @* B& ^5 \; L called by procedure DO-PLOTS
; n7 b t2 b; Q% I called by procedure SETUP2 v5 z# [" Z9 F9 Z* [# h7 S
called by 按钮 'setup'8 ~1 x* x) }' d# y2 i
求大神解答啊 |