我编的程序如下turtles-own [energy]$ r1 `4 Q7 M5 x ?5 f
to setup) X1 l6 Q: K0 g4 P# S4 G
clear-all
8 L: ]5 Q1 ^4 i @3 C9 T+ H setup-patches
( L, F2 G, q1 ^# h9 j0 S% r0 ]: ` create-turtles 100
# b: d$ V, |1 Z, P$ Y do-plots
P& P3 `3 O' v' Y$ B ask turtles [ setxy random-xcor random-ycor ]' p1 B- x8 g5 n- T) I
end* Z; N4 j _0 W1 R, b- }
to go
Z+ u+ M5 f3 h* \ move-turtles
3 T/ d+ l* m9 E eat-grass; i4 R/ u1 R- K& J1 a
reproduce
" z( q6 M; j1 s3 T9 u1 ` check-death' o9 |1 a c6 _: a3 @) v
regrow-grass+ `; p* B0 M8 h
do-plots- b' s3 Z- y: S
end
6 O8 h9 i4 L7 w4 Rto move-turtles
* D6 o" F3 y5 A3 Z+ P5 C ask turtles [* Q% C w3 o! B/ H5 m, _% g
right random 360# J3 a& b8 M/ c: y% Y8 k; h x! t2 V
forward 1
+ f& p s, Q O z! G+ s, m( i set energy energy - 1
1 T6 m9 K( ]# Y& z$ A( K- Y ]
) w7 ^ l2 U }- D, @end M! r. J) H7 S/ |6 M) b
to setup-patches% A6 W) Y/ \- F& t1 S- }
ask patches [ set pcolor green ]' z/ }( s" i2 C. K4 U. u6 q. e
end/ j" |9 H' g& k n: X
to setup-turtles
& n( L9 t% V+ O, g create-turtles 100
: y3 B5 j* o+ c9 l" J6 v# x ask turtles [ setxy random-xcor random-ycor ]
( Z9 w1 m$ l- Lend9 R6 a; ^% I0 z( y
to eat-grass5 o6 t% d. S- F! \( K/ ]
ask turtles [
+ T I: [. }, K- d9 n, z; [4 x if pcolor = green [' |* R2 ?0 o! ^' |" E1 p! Y1 C( z
set pcolor black
9 Q+ v) |" ^; M. B/ t7 [& ~8 E: @ set energy (energy + 10)
" p7 R1 L. l/ u9 a9 P3 F. X ]
0 O* `4 P0 `/ _$ J% |( B ifelse show-energy?! ]- G; H1 U$ A8 B
[ set label energy ]
9 _( j3 G% b" o8 U | [ set label "" ]
7 Q6 G4 G' y% i, t ]
# {6 |8 U& p8 h( `1 V0 p" Z' V4 d2 eend H( K- R: F( y* G6 W; r% ]6 z
to reproduce
% w3 _* U& q2 O+ v/ B3 f ask turtles [
4 Y; A# G- ^3 {/ d3 i: t% h0 d if energy > 50 [
% G8 h+ @) R" T, J2 b7 h% w set energy energy - 50 a6 S' T/ F! E
hatch 1 [ set energy 50 ]
: f; P/ Z; S6 E3 ^) I8 |2 Y6 P ]" A( Z& G, v7 `8 s
]
: D' w0 L# D5 S3 nend4 t- e! l. o! G( D
to check-death; |; |" H9 z% f5 s; E* G. z
ask turtles [% P! o* [( @- g* h
if energy <= 0 [ die ]4 Z/ i9 m0 p- T1 H
]
7 N5 e7 D2 D" o& H& Zend
5 Y6 ^" v2 t5 b( l6 pto regrow-grass
/ ~2 r; D1 [$ H! m. J- n: S8 k ask patches [
9 A: m6 J) E3 o1 ] if random 100 < 3 [ set pcolor green ]
( m$ n5 [$ M( f5 [3 v ]
- d( W9 C, S3 x" v4 ?) n1 kend" u' G0 E6 Z) l- k
to do-plots# X+ A6 q& ~: Q& } e
set-current-plot "Totals"
, i- G1 [5 ]3 f Q2 i set-current-plot-pen "turtles"' ~% }. n% k* V. C* Y8 _2 Q
plot count turtles
s# D3 R" A" h+ s" K0 a set-current-plot-pen "grass"
: m; S2 a3 C7 u plot count patches with [pcolor = green]
7 R* i+ |3 ?+ D. a) u' h+ t2 j* uend
0 _/ C0 k" ]" B可是运行时提示no such plot: "Totals"
. @( ~# E' [# t3 e- x+ R7 [error while observer running SET-CURRENT-PLOT8 ^' t6 ?3 J( S$ P3 V
called by procedure DO-PLOTS
2 q: o# d' }3 d) G% A called by procedure SETUP
w7 `0 B" H' t called by 按钮 'setup'( Q' J D2 k7 W, ?4 b2 J
求大神解答啊 |