我编的程序如下turtles-own [energy]
' T; D' j* a- O# d$ Z0 R* Yto setup3 h2 `& t9 P( D" r% K
clear-all4 j& ?9 r5 W4 a' e! X
setup-patches, ]( S" A R5 `% ~: k! y' `. O
create-turtles 100) F; G2 X2 K4 k) F' ~& j
do-plots0 z6 g1 ]4 ~2 K( p# o
ask turtles [ setxy random-xcor random-ycor ]# H. J" C' G5 N2 U$ k
end
: ^8 a- E" J# r6 }4 Sto go& | c5 J0 G3 t2 O" H
move-turtles, D7 V' B, J& Z, Q5 f
eat-grass4 X* G1 N3 \) H7 u+ t% z' V* D
reproduce
7 U! S. j4 |. g' u9 b* P: V+ h' Q check-death
: E- {1 c* g" S: Y8 o* q regrow-grass3 y" T& W V- X3 i) v
do-plots
* r- y! I9 n2 _$ v* lend
+ l9 W6 Q# _; N" x" B; T! Nto move-turtles% o: y; q y: R* F
ask turtles [
2 b, l; H* ^- f& ~' p- U- g right random 360
+ O. J. Y. B) R0 `- T1 V( Y' L forward 1; r( r% _" I3 \* \4 A! |9 |$ p/ M+ j
set energy energy - 1
; G/ B$ Q0 M. U- [5 T' `& X" u6 [ ]
! P& n- C5 ^2 u: E% uend2 U% t7 R1 E# v* X+ F2 t
to setup-patches3 o% w0 a: w4 J( b1 f0 d: M
ask patches [ set pcolor green ]* G4 I* n( A6 R
end9 L$ a# P: N: T. V" L, Q
to setup-turtles
2 Z& l+ @* o% l8 }, q) O create-turtles 1003 D0 E0 J$ E1 y d" {# G" `
ask turtles [ setxy random-xcor random-ycor ]
) E& p0 \6 @; pend
8 p) M/ w: e- u+ l; Xto eat-grass3 x$ C, D4 \, D1 j$ n
ask turtles [6 r: R7 S+ ^7 L9 @
if pcolor = green [
+ [# ~9 A: N9 J' b7 U set pcolor black
- _5 t4 ?; i# s9 S0 k* E set energy (energy + 10)/ ~$ J( j2 g9 y
]2 ]; |1 s$ T; A9 K7 f; i- g* R- ^- B
ifelse show-energy?
* J; d1 q$ f( O; o& _9 `9 p, C, ~7 v [ set label energy ]2 D, X# u# y" N$ h
[ set label "" ]
9 o- S1 E, |: b# Y c3 u ]
& c5 a( j$ m* |2 m0 K/ F7 y, ?end
. ^" P: A; v5 T T4 I5 {9 Tto reproduce
2 H9 `7 v1 }- l+ ^# E ask turtles [& \0 ]2 ~* U; _+ z
if energy > 50 [
& A& T3 R. U9 f) f set energy energy - 50
6 |" n& F2 G/ L5 C4 D hatch 1 [ set energy 50 ]& A; A! v0 ^7 |7 h' I m
]
- L6 p1 }1 c" W& _6 a ]
; _; F& s& y7 Q( p6 b4 j, rend
1 w, Q" A' ]$ s( jto check-death
$ d+ i& H" A. {! z/ G ask turtles [
# g+ \# m% ^. C" X2 i if energy <= 0 [ die ]! r5 w1 \0 Z! H4 U& C3 }3 n
]7 t1 }) M, d, B
end; L. a- R: C. y0 Y& }$ ?0 L8 r, k
to regrow-grass
* M2 ~( l( Y" O7 J; J2 A) F ask patches [. F9 _: Q! k+ E; G+ L+ I7 g" g$ q
if random 100 < 3 [ set pcolor green ]+ f* Z* J% W5 G1 c
]' t3 ^. p; k- `, N, r/ a
end
' r$ `9 l8 P* @% O r; `to do-plots( h5 ^* G& R4 t: A& m# M5 y& ?
set-current-plot "Totals"
& }+ O( }# Q/ X# v set-current-plot-pen "turtles" z( E" g3 g5 K5 ~
plot count turtles
9 D m" ~5 e& z( G set-current-plot-pen "grass") `0 d8 ~; W4 j1 n' v& K
plot count patches with [pcolor = green]9 ~8 v, K1 E7 {8 v* w1 A# q
end
; I4 Y6 M* `) C: W可是运行时提示no such plot: "Totals"$ F$ g& t2 y" b, m8 S9 S" b
error while observer running SET-CURRENT-PLOT, k( m2 o" r# I8 h* L
called by procedure DO-PLOTS
" Z5 T6 k- s6 ] called by procedure SETUP$ c) Z- I" A: }6 G) }
called by 按钮 'setup', N) p8 w6 E& y7 u9 u
求大神解答啊 |