我编的程序如下turtles-own [energy]
* i! A# T+ ]! `: p: c) mto setup
1 H3 Y; Y }5 P clear-all9 t6 V! [, ?! X, W3 _: w7 M
setup-patches
[1 i4 G6 `/ w create-turtles 100 `+ W- U O! W3 Q
do-plots% U( E# P* B. L' Z+ {! j
ask turtles [ setxy random-xcor random-ycor ]9 {. Y0 Y( E' Y
end$ A3 A, s2 P1 R: T4 J/ L4 d R6 C
to go% f3 J+ Y8 U$ ^% I! j4 S1 @2 _9 V
move-turtles5 P+ l* p; k' {( J5 E% }' a, j
eat-grass" z+ s* F. R! K6 l: I' l
reproduce
) ?( B8 d8 x4 @, [6 Q7 S' B check-death2 R q8 ^( H2 m0 C$ C; E! z: v
regrow-grass m8 I5 {$ [9 X$ V% y# {
do-plots
/ x( y. P, i7 Oend
" |( D, J; |0 Z7 m! S& Ato move-turtles
/ P; ]1 O/ u3 H ask turtles [4 B2 H4 F: v# C* O8 s/ i
right random 360
+ T/ b, I) Q) p* [6 d forward 1
$ c+ h8 X/ o% X& @. y! x- z. F set energy energy - 1
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2 L4 F1 [1 M) r1 @! mend
; L4 X' S( D# P! h# E( [to setup-patches
$ j6 j6 p/ [5 P* W: \ ask patches [ set pcolor green ]& ~# v" B* S/ C1 ]
end6 q' r5 J- a p2 [% L/ q- K: x
to setup-turtles
7 J6 F5 e) U$ ~. U% J create-turtles 100
$ d) z6 V4 Q9 w2 x6 [- }* y ask turtles [ setxy random-xcor random-ycor ]
# G9 P% g2 J$ L) E4 F2 e! h* Oend4 }7 _8 U' y$ h8 M7 t
to eat-grass
' C F' q2 L5 N: N4 v4 `& k6 ^ ask turtles [7 l' d! V" Y% i
if pcolor = green [
6 j7 A. y0 y& b4 ^" r set pcolor black) C8 Q4 D* A# V
set energy (energy + 10)% x& t9 `# }& }( C# x* N* m
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ifelse show-energy?1 U7 _6 [7 a" i
[ set label energy ]
% O) z% x: c, ~1 g& |. `! @ `( }# n) x9 c [ set label "" ]8 L3 V$ X* C6 [; I. F
] g, }3 {7 B- h1 Y
end0 F/ P+ H6 J; J
to reproduce% [5 U% h+ d- k, J
ask turtles [9 v# f- z. O* [/ g
if energy > 50 [& F% ~+ q/ V- N0 w: ^( S: t/ W
set energy energy - 50- ~6 ]6 ]3 s+ y' e7 h: u& x7 Q5 N
hatch 1 [ set energy 50 ]
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]/ R" Y! T% T8 J) k. M
end/ |: L* v+ D* z
to check-death
0 s) T8 A3 ]! J% f( x' ~1 H' P ask turtles [0 b9 ^/ {2 Q- U/ |) v& \" i
if energy <= 0 [ die ]
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end
9 c! w. c4 Q i' V1 oto regrow-grass
! P- k- v. {! O* b2 I8 a4 A+ [7 ] ask patches [% c3 v; O- N6 f7 N/ ~
if random 100 < 3 [ set pcolor green ]
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end& \2 j2 |5 G% |; p* R
to do-plots
* X3 i/ A+ b' P) ]& W8 Q set-current-plot "Totals"2 |- w+ u+ U# e
set-current-plot-pen "turtles"
" J5 M9 R7 K: x$ j2 o$ M, N" z plot count turtles
0 e( g& J, d) K' m; c set-current-plot-pen "grass"
* K" ]# P7 R. e5 n- u( [) J plot count patches with [pcolor = green]& h! B) n9 S6 l6 a& i/ b
end
& n- T) |/ O3 u- m5 j7 z; F可是运行时提示no such plot: "Totals", X+ i ]4 i7 w4 c- U- i4 x! O5 G I
error while observer running SET-CURRENT-PLOT+ G d5 c2 U2 Y* {0 E. @
called by procedure DO-PLOTS, t) `# M3 l1 ?# [( A
called by procedure SETUP
: Y2 q$ `) z4 O: u: \ called by 按钮 'setup'
Y2 L) k$ z. q* j* r4 h求大神解答啊 |