我编的程序如下turtles-own [energy]
; \5 ?6 o) X. E9 o. Ito setup2 d, a" i6 |! u' X; X+ G- l0 a6 [5 L
clear-all
2 q2 W( i# d& B2 A- h4 _ setup-patches' q7 W6 `4 p6 t) J4 ~# C2 E
create-turtles 100+ g% A7 H6 z+ @$ V+ g" v3 Y
do-plots
1 ?, _( y7 G9 V ask turtles [ setxy random-xcor random-ycor ]
& t: \4 ^1 P* }% Z/ [1 ?end
: u+ Y9 q( V. x6 n) u# U5 S. ?# Zto go
4 s$ Z6 f' N1 q: Z move-turtles
! _2 ~4 G% [' g eat-grass) a3 p5 _1 c, l0 H
reproduce9 m' ?- f3 a9 C3 ^" C. _
check-death3 r5 `" v5 F; c2 l5 y) N
regrow-grass
1 V5 E3 u1 ], C5 o do-plots
9 \5 A, D( j2 Q8 Jend
' H# @* d7 U, f% Dto move-turtles' i- e9 [7 j$ o# J' x
ask turtles [
/ e! O5 j% {* d; J right random 3607 C% _7 I6 D) v
forward 1
6 H2 L3 e! `0 L* \ set energy energy - 1
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end) g9 W2 A/ K* Y S+ N. w. l8 A$ w
to setup-patches
7 q% Y7 c7 o' b# a ask patches [ set pcolor green ]
5 s; K" @1 ^; L+ @+ K' Uend
1 a& G( w- I. [. G2 ~* Sto setup-turtles
# I; n9 _! w# y7 v create-turtles 100$ R; c8 W, n. n
ask turtles [ setxy random-xcor random-ycor ]" l% @2 _0 S1 F* O% @( N) ?
end
: ?; }) Z3 F& L! a/ v& ~7 z( kto eat-grass
9 s! I1 D2 b. q ask turtles [7 u1 W. C' c/ {. v# Q: L/ q
if pcolor = green [
}8 d: q/ E7 K8 E" ` set pcolor black: |! p4 Y/ `) ^# W4 g( U
set energy (energy + 10)
+ {8 _% I3 N8 A9 C- {6 v8 r9 W/ W" U ]
0 h& I1 _7 ~# u ifelse show-energy?1 {. l4 L% w p! d4 R0 U. V
[ set label energy ]
: b# k0 t, Z( E [ set label "" ]8 C' ?% t+ z9 @7 l
], |5 j. o1 i8 ~3 E! K R
end
( }0 D6 R, w3 @3 m. dto reproduce8 ~ B6 N( W, c: \3 ~2 A8 w9 r
ask turtles [
' M; j) Z6 x2 g if energy > 50 [
% h/ t, g/ _' P. O% e d4 L3 s( S set energy energy - 50% A+ B) J8 E1 C* ^: `
hatch 1 [ set energy 50 ]
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] f0 G( |! {3 I3 Y, D
end
3 ]* c0 D, d" o; [, I5 qto check-death' d/ ?1 r( c& Q, _) V
ask turtles [- I/ @) ^) z: O" H# y
if energy <= 0 [ die ]
# n- C8 c8 f$ X. \5 r5 C5 q5 y ] X$ A- V7 i! J+ r' U
end7 s- A4 [! y* ]* P6 ^( b
to regrow-grass
1 s6 S5 W0 v; Q ask patches [2 A( J) w9 F- N
if random 100 < 3 [ set pcolor green ]
! f# h6 f/ T2 n. O ]; c. }1 g. V6 J w/ X" I+ b
end. U. d1 {$ R5 h/ n
to do-plots
( c# A. q+ d0 P3 F4 C/ i& K set-current-plot "Totals"
. w! C( {( w9 x; z6 w. ~ set-current-plot-pen "turtles"0 v, y" S1 d/ T, l( A7 y1 W$ S
plot count turtles/ D, K2 e* v# v7 i5 J) ]
set-current-plot-pen "grass"
1 {1 d& p8 B R& ~9 i plot count patches with [pcolor = green]! O0 Y4 ?1 A% C- Q( f7 L
end
, _9 m0 v/ I: }1 ~ F可是运行时提示no such plot: "Totals"3 {/ A5 l0 R- _+ Y/ K5 _8 U
error while observer running SET-CURRENT-PLOT
* E) T1 ^5 r f/ U, |6 f5 }0 e; n& x called by procedure DO-PLOTS
4 b+ [3 j6 l6 ~ called by procedure SETUP' B. c4 X7 @7 c+ P5 ~
called by 按钮 'setup'& v% d: F9 s1 R3 f2 h. ]% a
求大神解答啊 |