我编的程序如下turtles-own [energy]
( D. L# r& ~6 w" F/ f6 _- |0 ^to setup
5 b# K. ?* J1 f clear-all4 T: ^$ u0 V. m* ^2 q8 F
setup-patches
, L V& G) D# ]; m1 v create-turtles 100/ C) q3 U+ P+ B' J
do-plots3 G' ?3 \6 x1 F$ n* x3 I" K: l* H
ask turtles [ setxy random-xcor random-ycor ]
& r/ B3 U2 x- a C' g1 W9 uend
5 F2 ^) Y7 U: Ito go F' A4 d e+ v
move-turtles
; X: v+ C" S- l- u$ \ eat-grass3 c/ V- `# S3 t
reproduce
5 G8 P. g) a2 `! @: _: @0 n check-death
# P0 W- a- W. o1 ]4 [$ L) E regrow-grass$ N% x# V8 o6 W
do-plots6 r" X Y/ m' |: C5 @( ^ N( @
end8 a: h# Z* ^2 b9 d/ S
to move-turtles
; q* ^2 L2 E/ W- ` ask turtles [. e1 W, F2 ^- v: V( j
right random 360; s) K! a" A$ v9 A4 ~
forward 1
7 p1 E0 W! A7 v$ F* d+ v set energy energy - 1
/ K& T- g' V I( B6 `* S ]/ N1 a( \1 [3 i+ r# Q
end
3 b1 n" u/ E& Oto setup-patches
; `# Z) j2 q. @3 @% c5 l ask patches [ set pcolor green ]
: C1 `# r6 r; S. s' }$ }+ d, k" z: _end0 u' h6 L4 j1 K& \3 X
to setup-turtles
5 [8 i: a: }$ l2 G' E9 F+ T& ] create-turtles 100
' t9 _) d! [8 a: P2 k: O! H ask turtles [ setxy random-xcor random-ycor ]- g o T& v; }1 }
end* U, k8 ?/ g, b0 ?0 b n
to eat-grass
; R7 P; T6 M6 Y* `! m* b; x$ g ask turtles [
" _. y: ?/ P8 S# n6 V if pcolor = green [3 N+ V( d- {1 I' \! I" g8 [
set pcolor black
/ o. T3 X' B' | S! u6 { set energy (energy + 10); I6 z2 f5 ?- \3 S3 U S
]
7 z3 @7 Q1 @6 V( Q ifelse show-energy?, x* g4 k) `6 A7 ?- n, R6 I+ w% W
[ set label energy ]
* u; f b: Z y- o8 h( Q; O [ set label "" ]; U* j1 F6 p! t7 ~
]
# T+ e# {' }9 k. W+ g8 Cend7 D6 x: d9 F$ Q7 n i# b
to reproduce
8 [0 R9 K3 x% m ask turtles [2 O& ?9 Y w6 w# e4 H
if energy > 50 [
C$ t" d3 L; F3 Y y& U set energy energy - 50
}: G0 K/ |- @) ]- B0 N4 p hatch 1 [ set energy 50 ]1 q$ o8 F" }, S; n/ U$ w
]8 C u% ~0 u- B# O# q9 g7 G
]
: _1 M7 n; `8 C$ e' P* kend
. ~. c8 C: V% s7 Dto check-death
) B/ G6 I4 ~' h) X7 H ask turtles [6 D, O; n. N8 R1 Z
if energy <= 0 [ die ]2 y# m: M2 G1 k3 F
]
- N- C$ B$ Z. }0 k5 t& U% Z% O6 Cend" J6 e2 S5 q$ i4 [9 _
to regrow-grass
) W. g k! Y! } ask patches [' ?. V# z/ _: p! w( t- |9 L* v! F
if random 100 < 3 [ set pcolor green ]
6 U( A( j P. D' W/ e/ d ]3 D6 c( C: O3 Q9 T6 ~6 ?" ^/ i
end; Q; y# Y! Y$ z: z. `
to do-plots2 S0 P7 t% I0 f& G7 o1 R k
set-current-plot "Totals"
2 l1 I! ~1 f5 q2 A: I- C set-current-plot-pen "turtles"
# F. ?, s. e y U# h. B plot count turtles* t: V" ?9 m% _& e
set-current-plot-pen "grass"6 ]' @( g% r2 L. a, v* H9 j% G
plot count patches with [pcolor = green]
, }1 u; N" n% S5 Lend
0 L# n: o- v% k可是运行时提示no such plot: "Totals"4 @# U( n+ ~) U" b, ]) j
error while observer running SET-CURRENT-PLOT$ Y& B/ `7 c' H
called by procedure DO-PLOTS
# C$ [* W6 `" V8 h+ K called by procedure SETUP
4 N2 J Y: l3 N& R. H2 D: H called by 按钮 'setup'/ c, Y" P3 T. `, [3 U/ F, w
求大神解答啊 |