我编的程序如下turtles-own [energy]
- R3 C( i, \( T0 m& L" z0 F) |to setup5 `; B. A! P d! D# X, e! g" ~2 J
clear-all
9 Q- _: } C* M6 K setup-patches V7 _" N' t! i a% w
create-turtles 100
' g% D7 L- o1 Y1 d/ c2 X do-plots/ W0 j. X; t. m- b; c6 b
ask turtles [ setxy random-xcor random-ycor ]3 D- W( A) g% i @5 b& {
end; d# H" f: ~4 N
to go
7 `7 O2 Z' p. o5 {1 A8 Y# F% w$ v' u move-turtles
0 \3 d9 l9 C; J' T( N8 x" ~ eat-grass% W! A: I3 @0 Q) g
reproduce
' n8 i7 U9 B. b& ~* q k check-death
: A1 V! B! `' N2 C: r. F8 {; s/ q regrow-grass5 Z2 H' m/ {9 D& y+ ^1 X
do-plots5 C; \7 ]! |6 O6 z; ^4 `* b5 {
end0 d9 q" u, K$ t b9 {
to move-turtles
* q- @! e8 P+ {1 f" G9 B ask turtles [% k2 A* v, g% K0 i- J( y" a
right random 360
. S6 ~4 a5 B8 I; x& A forward 1
0 O9 Z1 \" j8 e+ u5 u set energy energy - 1
5 Y% q3 I1 }( t' m ]( O9 y& X; s8 m) G6 Q" C1 j2 x
end
& e. D1 R8 Y) l4 p2 Cto setup-patches0 ]% U+ \3 ]& w0 z5 b4 v
ask patches [ set pcolor green ]
" r2 Z7 O8 b# ^end8 T# Q# B- t! _! B
to setup-turtles
1 K9 r( D# m' t! R! i create-turtles 100& x! r0 f7 G0 y
ask turtles [ setxy random-xcor random-ycor ]5 j' q! s7 [. y F
end
* ?; G( H7 H+ q- ~' N1 t6 }to eat-grass, Y# C: R2 t5 e1 e$ C! i9 i
ask turtles [
, v0 z( `* S" R2 t6 v& T if pcolor = green [
( V; @) i) [- G" A! N set pcolor black
, n: c% T; U5 U; j" c$ U set energy (energy + 10)( I) X+ R, o" N. Q
]( Z' f- k! I4 Z. l
ifelse show-energy?
. t8 h! z7 Q4 { [ set label energy ]$ U( r0 d; B, U, \
[ set label "" ]7 S @6 C! {! `0 u9 O
]
* s# E( u' i) S( J/ aend
# T. L5 n* Q9 n% q5 @& t# ?0 { tto reproduce+ O* f5 D2 L/ H3 d
ask turtles [
9 H% r9 ]% T: L# n2 W7 x7 C7 ~ if energy > 50 [& R. o6 G- M! K9 g4 P% _& ]
set energy energy - 50
& G! U6 I0 `8 G1 e% y& P4 r hatch 1 [ set energy 50 ]$ N2 |4 J/ z1 E( W9 p. g8 P- T( n
]6 e# A4 ^! a! Q1 @
]! S" \9 x, \; _& f& r# q; D: Q
end
1 M$ J( s* e- @2 S, U4 ?to check-death
/ Y: s8 ^+ N# w8 D! K4 _3 {( c) D% J ask turtles [
, p6 r5 O5 f5 _! A7 ?6 g if energy <= 0 [ die ]2 P3 R; X7 A$ \; N4 q+ N
]
. _+ ~* \$ @8 C8 e8 r- yend
' x& y/ i- |) Oto regrow-grass
: A& v; H/ q$ ` D" i ask patches [
6 X$ r) I6 L# } if random 100 < 3 [ set pcolor green ]
6 w9 S& m4 s2 I! } ]
( u# i1 ~5 ?" {+ W. u" j& p. {end
1 J N' j. ?4 |- Kto do-plots% m# s( |6 B, Q9 r
set-current-plot "Totals"! h1 j3 ?' t! I3 p* e
set-current-plot-pen "turtles"$ u) J1 u" t: U
plot count turtles
1 S% A0 J% @% h1 d set-current-plot-pen "grass"$ M- X* \1 b1 q1 |1 a
plot count patches with [pcolor = green]3 a7 B, u- j# k8 ~
end
/ {: s0 w8 U$ \- K( h9 ~6 r可是运行时提示no such plot: "Totals"8 ^0 L8 i& h1 l1 i" z8 q9 G
error while observer running SET-CURRENT-PLOT0 W4 j2 m7 g4 ]" L2 ^; F# ]
called by procedure DO-PLOTS/ A/ g; u! p: n
called by procedure SETUP
' ]6 t* \. r- y/ r; q2 x+ ^ called by 按钮 'setup'
" X# @4 G; ^8 n4 A$ C求大神解答啊 |