我编的程序如下turtles-own [energy]: u" D! v l' S9 K9 V6 \
to setup1 a& r+ u8 y6 S/ o- V
clear-all1 M% R* Z* b/ ^ N
setup-patches
% y! ~& y! S2 C create-turtles 100
3 M+ @* A4 a/ { do-plots
0 |+ e) Y7 ~7 R3 Z; K ask turtles [ setxy random-xcor random-ycor ]( r1 ~$ y, d: q+ z
end
) ~$ {2 s* l5 U, Ato go
- O1 R- j2 l% T% b( n move-turtles
6 y4 @4 d) @5 m. }2 | eat-grass% D# H- U& P5 N. i
reproduce
6 A( ]: Z2 T% D, z0 P check-death
! ~) ~. l2 A/ ]$ J$ f8 v) s regrow-grass, d: o0 H/ U6 T/ q2 Z9 p: M
do-plots
7 C+ @# k/ ]% u" Q2 G2 Mend: J6 P8 L7 i- ^5 R7 |/ e) H6 D
to move-turtles
1 l+ I1 X0 F$ g7 z% ?2 I9 X$ v ask turtles [
0 L3 K; B; u; p) K6 H1 M' ^ {3 | right random 3604 E3 v- @8 ]# O7 X. a P
forward 1$ ]0 [3 O, |6 I
set energy energy - 14 V/ V/ _. W$ M* V! p
]
/ e* \7 c, A5 V* L {end" k/ U5 z a: @. F( l5 O
to setup-patches
. k! Y/ Q5 y3 f* R/ c- s ask patches [ set pcolor green ]
. F' B& O5 M2 ~1 a! `! g5 Jend
( g9 f! l) U+ }7 M' B" Sto setup-turtles0 m" }; [1 k4 C# M$ y7 o" D _. f) ~
create-turtles 100# z }& f) ]: @; q
ask turtles [ setxy random-xcor random-ycor ] J& T: g2 B) f4 X4 E
end
" Q( \1 Y# S4 [5 V* Jto eat-grass
, P' Q$ J7 t5 `& |7 n( m- u! | ask turtles [+ z( t, w9 m- N/ T
if pcolor = green [
5 x( L' y9 u# O7 Y6 s. ?1 @. D. K+ h9 S set pcolor black; o4 a+ [; ^2 g5 F) J
set energy (energy + 10)+ z$ z2 ~: v+ Y* \
]
. ^% h; z- Q* S# V ifelse show-energy?( X9 S/ {7 L4 N4 V; Y
[ set label energy ]
4 k/ O1 z+ e& D, N [ set label "" ], O) d" q8 ~) w6 M; V
]( D( d4 O }1 y) X6 X
end1 ^: M* t2 j3 i+ |% E+ H3 B
to reproduce6 e* k- ^6 G7 T( w9 S: W1 `
ask turtles [ ~$ C& `7 e: ~
if energy > 50 [
. T, P8 `& v$ o set energy energy - 50- Y0 H& q5 Y- p2 T6 H/ e
hatch 1 [ set energy 50 ]
3 u& K* T- A F2 B* v- C" @ ]
) y/ u! Z9 P% U; I/ [1 p: o ]
- E% a4 ?# J6 k) i1 D% m/ iend" ?2 e3 W2 p+ h4 R. x \" e
to check-death0 f+ M2 p$ [+ q7 U
ask turtles [' `; H& o) E+ K9 ~# H
if energy <= 0 [ die ]7 L6 w8 {7 e0 x. D: E+ f; f* [ y
]* g, H( ?3 s7 ?0 S( I% L
end: k9 W5 B( O/ |$ T1 v0 O
to regrow-grass
6 v& p/ }4 @, e ask patches [
Y2 O* q: r* c if random 100 < 3 [ set pcolor green ]8 T8 ~4 e1 e& `" h
]2 `2 _3 g: |6 Y' |) a2 D
end1 W' {, l9 E- r# d0 U8 y, v
to do-plots
3 {+ `+ A( @) w5 o8 w set-current-plot "Totals"3 e$ @' Z( k% ]9 A) x; V$ V* |
set-current-plot-pen "turtles"
( t3 l# J V/ t' d- R9 B; B plot count turtles$ m. ^2 x9 q) G
set-current-plot-pen "grass"- P" Y7 x+ @. J7 g5 f
plot count patches with [pcolor = green]0 N0 o) U$ ?/ u1 W: e2 A
end
. K: L V9 u( Z/ I( ]* ]可是运行时提示no such plot: "Totals"& [4 c/ N' Z* z& A9 Y" ^$ W; m
error while observer running SET-CURRENT-PLOT# E/ ], I2 G- e* e
called by procedure DO-PLOTS* F. u1 P6 Q9 e
called by procedure SETUP @- g9 V9 U# |' k
called by 按钮 'setup'/ W6 I% R/ n* P% M
求大神解答啊 |