我编的程序如下turtles-own [energy]& B' N" h* Q5 _2 _$ g3 v9 W. f5 C4 N
to setup! n& a) \' C( \1 a/ \
clear-all
0 l$ l6 f H! ? setup-patches# H( s2 {$ Q9 M( ^
create-turtles 100
' ^- Q" V: z1 A/ j M1 {) D" n$ f do-plots( e* f4 }8 h) R2 n9 j# ~$ t1 V
ask turtles [ setxy random-xcor random-ycor ]$ E' l: \: t! Z% Y
end7 W8 K. |( _% a |$ H1 e, R6 f
to go' h( r8 R& T7 V# H9 K
move-turtles1 n! b8 f- \9 x! t/ r9 L+ {
eat-grass
/ l4 ]* w: O( E/ s8 Q reproduce" l; p9 p* r2 K2 U
check-death
# {7 d2 S9 |' |8 ` regrow-grass
. Z) a# t- A6 n$ f; n0 O do-plots
7 |1 Q& l# M' w5 ^end
' G& y+ Q, D2 G. Kto move-turtles
9 {# ^8 t# l9 I! k7 ^. b7 R! ^ ask turtles [
# r% l+ m5 V- e4 i right random 360
1 j/ ^1 }, v8 b$ U) X forward 1* D; c$ ]6 K( J
set energy energy - 1( R4 h" W9 m7 ?8 ~: Q
]# u- x; r; p1 S5 d
end' i. a Q! {7 C; t
to setup-patches7 w1 J" A0 G& q% }- f4 r
ask patches [ set pcolor green ]0 p% W) i/ j; C, Z$ ]: ]
end& R( D0 s ^7 C. K3 C+ T6 R
to setup-turtles( C; a. m/ x. k' W- ]
create-turtles 100
. d, h7 g# D% J/ j. J ask turtles [ setxy random-xcor random-ycor ]# k* s* X9 J2 J" q# ^( E. @5 Q
end
# o3 X6 F" h7 g7 N. W; xto eat-grass7 |" K: F; D6 s2 `5 T
ask turtles [
( {, m% J/ W) m' W- r n5 b, e if pcolor = green [
& g8 ~2 t! b+ h S7 y# S* B set pcolor black- O! ]4 p3 m" O
set energy (energy + 10)9 }8 ~5 l8 M+ C; d
]
( a( y) K. ?$ n# x9 }( V) _' e ifelse show-energy?& q' q3 ^/ u2 V2 ?
[ set label energy ]: B5 C2 D" K2 C3 b' S
[ set label "" ]) s* Q t3 T6 V5 u
]* U* t% w: j, r
end
2 Z, r8 s- s# w+ N: @to reproduce& f; D1 O7 t; W5 }1 p) z, J: p
ask turtles [
0 Y& G1 _- S ]5 E( W( v6 a if energy > 50 [
, A2 S* l2 g, g3 s: c( H9 G. m! z set energy energy - 50
9 m4 x. ]+ Z" x N/ b. C hatch 1 [ set energy 50 ]
' k$ N& F8 I' r3 _( k ]+ H" m. N8 C8 u7 [; e, o
]) a5 h! K" ]: E. h3 ?. d
end# a/ R& S+ {" N
to check-death' X; d$ Y2 n5 Y! `5 ^
ask turtles [
9 N9 v4 g6 U1 F" d8 k if energy <= 0 [ die ]
5 h! U& o, b8 o1 r" x ]
: j. D: }2 t4 p6 ^" U2 `end
D4 U( K4 A0 U3 n7 E2 h5 p- Bto regrow-grass
* Y8 B, |# z/ o' v# y2 G$ Z4 p; D ask patches [
9 g7 R$ e& T. p6 r a8 S. P8 {2 W if random 100 < 3 [ set pcolor green ]
( V: y3 A1 S% @5 |/ E8 A, K r ]- V2 N# z1 C# K7 S7 J1 L8 u
end6 m7 W& _( l6 R
to do-plots" m* |6 }! _* J6 [1 \
set-current-plot "Totals"
+ Z! s N# q! y- F6 r X set-current-plot-pen "turtles": W- u, ]6 n# d" t' J, H' v
plot count turtles
) @' D, I5 [! x4 y8 j7 p+ o set-current-plot-pen "grass"% H' j; b; W( x+ G
plot count patches with [pcolor = green]- ?3 d/ a% r" U2 k4 a! d
end
3 \2 g4 j4 x/ \# A$ k. z' e可是运行时提示no such plot: "Totals"1 ^' b/ c/ U) X2 a; n1 n
error while observer running SET-CURRENT-PLOT; A# O9 r( I9 B4 ^; F* X
called by procedure DO-PLOTS
. _/ R, X8 t8 n/ |" j) v8 T called by procedure SETUP9 G0 L$ O' q( L2 v' M+ q% g8 ]- s
called by 按钮 'setup'
6 A7 R3 j5 \5 l- u求大神解答啊 |