我编的程序如下turtles-own [energy]
) b- w; r0 _# G5 K3 k( Hto setup' ]; V% { w4 {3 P/ r- m4 s" b
clear-all8 `2 f( y) H- d [
setup-patches
6 X' E8 k$ i) Y; [: n4 x create-turtles 100
$ w" _3 r6 ]* U0 K! ] do-plots F- S3 F! S6 w0 E' \" K
ask turtles [ setxy random-xcor random-ycor ]
`' k& F6 Z+ d" W n3 b2 eend- |, s H/ Y( l; F B$ W
to go
: f, Z0 ^2 l% {' U3 H/ I8 n move-turtles
9 b$ m( z# E/ z% q& L eat-grass) Q* c$ A3 n+ T6 l+ x, s B& t; [
reproduce5 K* |0 |0 H4 _0 S5 `& J, |* f2 e
check-death
% u# J2 T+ U$ k, U$ q regrow-grass3 T# b5 p( c* ~/ Z l* d
do-plots
7 e: U; I# l) i ?6 Q# A" D Iend
! `: m: _; ^8 o7 }$ J# q- N/ R& zto move-turtles3 _' A/ U( u! Q
ask turtles [
1 {; A0 Z& [5 H/ Q9 z+ _ right random 360$ r$ ^" C( m( i0 `5 X
forward 1, |3 x1 A0 h' i2 N: J! h/ ^6 I
set energy energy - 14 p' G( R! T# r r5 M6 c e
]' l h; D" e) o) ~
end
# {$ n% T% w1 hto setup-patches
9 m4 @7 @' b" w* d O8 ` ask patches [ set pcolor green ]. Y: ]9 h3 {0 [1 `8 h8 e) d5 k
end: q7 A' X$ w5 o# y& F5 ]$ k
to setup-turtles
; F- E$ E1 v% o create-turtles 100
" @7 q* V7 F; j+ X8 P ask turtles [ setxy random-xcor random-ycor ]# H+ ]- y$ \* H$ L0 Q1 H6 z
end
( N2 J. |, j9 ]+ E. c& l' T0 @to eat-grass: E2 ]. V0 g5 G% S- l$ v, g' g
ask turtles [
/ @( [5 i; h' j* Z! I if pcolor = green [+ |7 P4 l# l. l' I7 Z% k
set pcolor black
6 X! S0 |' x3 N set energy (energy + 10)7 y5 G2 J) E; E
]2 i& j: M- d2 x1 F/ X/ Z, ]
ifelse show-energy?4 ~# b: {3 Q/ s3 x8 ~( N( T% W- o( a
[ set label energy ]
9 h5 I* G, r F$ }. @4 k [ set label "" ]/ K. Q# N. L7 z u. N
]
8 M: y6 D6 ]3 ~& {4 x4 `4 xend
, q( p3 x+ P" b4 Dto reproduce
( n+ o/ E; t( ?% ?0 m7 \/ C/ i; x5 E+ J ask turtles [- a+ z8 @& }7 f$ b- U) r7 W9 ~
if energy > 50 [
: B: X- t5 Z) g+ Q set energy energy - 50
; m D" ~' p' r x hatch 1 [ set energy 50 ], m8 Y+ I& J- P$ D7 o+ G
]; N) Z: X, [2 ^+ B$ ~% D5 i! q; P
]
3 ~) E& H ]3 X+ n4 f1 R4 ?end
/ U6 d6 H: U" |7 T3 l9 W( jto check-death1 D/ \- x# S- \% T9 z
ask turtles [
' V' I" G* S9 b& C if energy <= 0 [ die ]
7 N% I$ d- D, k6 z ]
# a' _/ R2 g5 nend
8 i# \6 B3 {" ~/ X3 M, l2 k1 Y+ Wto regrow-grass! A, Q$ A0 Y3 D4 G
ask patches [
6 s( |, s* t. Z6 L. x, H; t if random 100 < 3 [ set pcolor green ]
" Z" ~/ C) z, n, N* B j6 u ]; E- h' n- J: |9 {( Q* E
end
- e7 C# m" R! z) Lto do-plots
6 x% o" I0 o+ i0 k; g2 X' ?" g* W set-current-plot "Totals"3 j& B) X) [/ k( s/ M; v: X) J
set-current-plot-pen "turtles"
3 O0 {0 Y( U. z plot count turtles# L& Q+ i3 n8 N- b' |4 }
set-current-plot-pen "grass"
& ~ \! g k+ C+ u plot count patches with [pcolor = green]: I) Z! F9 I+ _0 v. E4 n' O% \
end; |, X7 q% t) V/ g: x7 X
可是运行时提示no such plot: "Totals"7 U) x+ z* D. T ~& D$ ~
error while observer running SET-CURRENT-PLOT1 u- v& o; Y" e Z
called by procedure DO-PLOTS
& Z* k+ l+ h( \! A5 B. B( Z called by procedure SETUP
; x5 H% l" [: Y2 c2 G called by 按钮 'setup': T- s6 D) {5 \. M, p
求大神解答啊 |