我编的程序如下turtles-own [energy]6 A6 a- G! f; x
to setup: A3 k# y, B9 M" y
clear-all
8 j6 V, T+ _" y% _" b. @ setup-patches2 _8 q( Y* b4 m) J4 k- L$ y% A% P
create-turtles 100
+ v/ g0 K$ c- X: U/ L9 q5 [ do-plots4 [( Q3 R) o# |. B% R8 c; g
ask turtles [ setxy random-xcor random-ycor ]
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to go
- J$ t) l+ m: Z: ~ move-turtles/ G9 b: } K! u
eat-grass
6 Z9 R6 x. l. y+ s# u reproduce, {! c8 s/ u$ o+ ]
check-death
5 E$ y0 J* j8 Q Y. |& K5 b regrow-grass5 l/ K! g7 I( z( x5 g
do-plots5 U4 Q- M- S7 U% ?
end+ x5 O# X5 ?, E8 h( {6 m i, z1 [; O
to move-turtles
$ T' o: m. \$ n- ^& Q ask turtles [% {/ t. y" a6 S( T4 ]3 f
right random 360
& @ n) T3 |9 w6 ~) P& m% { forward 1
$ j; t" I4 c! I set energy energy - 12 v) U" a% v5 S' M" M- H4 D N4 D
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end% ^# V6 F0 ~% g! {1 i: ~
to setup-patches! n1 ?6 `; D+ g
ask patches [ set pcolor green ]
$ t! ^5 d# b& Y3 kend' I8 |7 u' m5 \3 D$ D& N' ?! H
to setup-turtles
. @& U+ p5 U/ S create-turtles 100
, n. |; B* [4 \1 [8 g ask turtles [ setxy random-xcor random-ycor ] F8 \7 j: V; h! l5 r
end
% z2 A, F/ _' J" k Qto eat-grass0 {+ t9 ?- `2 ~7 {, I
ask turtles [' E* s" H7 e! T9 }) b
if pcolor = green [
( M5 d. R( _7 x. h& U7 e set pcolor black
, @/ {, i. c/ @# @. W; {2 h' q set energy (energy + 10)
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ifelse show-energy?
/ L2 L. L, L8 j6 H [ set label energy ]* d$ {1 i- D) G
[ set label "" ]
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0 U7 ]# k Z! t* c5 h& `end
/ Z8 c' n* O0 }- jto reproduce
# \0 l; a4 T* S& Y. s! ^ ask turtles [' u2 x0 k" R8 a1 X
if energy > 50 [
! p* u1 B2 Q, `; N7 P# T9 E set energy energy - 50
, X9 c; B! w. f hatch 1 [ set energy 50 ]
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]
( }* t7 J2 z7 _' }' }/ Eend
+ P1 M5 O- r) ato check-death* c2 Y. K. W V
ask turtles [
( K$ q! A: s0 ~ if energy <= 0 [ die ]
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end1 b- `: P* ? ?6 p+ d5 z7 h' v
to regrow-grass
6 U0 y8 A+ u6 H ask patches [
% ~+ d. X8 \5 p5 F f if random 100 < 3 [ set pcolor green ]5 Z: J# d5 K: d% ~
]
, Y0 N2 d# ?+ I. J/ ]end! X3 X( c) |- s; B. w K
to do-plots/ {1 p1 W) M! Q
set-current-plot "Totals"3 K1 \7 u) _+ Z$ q
set-current-plot-pen "turtles"
& @1 X' G0 F4 G% A9 t2 L7 h1 b plot count turtles) {4 l6 _# ^, l ^/ K
set-current-plot-pen "grass"' b( [2 T6 ~0 m0 T) Y6 A1 b
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"& h! ~2 [2 t9 Q. k4 T4 q
error while observer running SET-CURRENT-PLOT8 T& b# h, x ^% \1 G
called by procedure DO-PLOTS3 z" [* ]. k! l B7 _. q
called by procedure SETUP
3 \/ Q O1 e9 u& ~5 v called by 按钮 'setup'
9 f2 P8 n2 ^8 l/ z \. m求大神解答啊 |