我编的程序如下turtles-own [energy]
" A }$ ^; b1 \+ fto setup
0 a9 W/ |, }0 Q" d8 u" Z clear-all N; k' W' A8 d0 i
setup-patches0 B0 c/ l( p- s# B+ _
create-turtles 100' X- ~7 q; o5 N* b9 \
do-plots+ p# g6 F$ {% n- j4 x& m3 K# I0 A
ask turtles [ setxy random-xcor random-ycor ]9 G$ u9 @; `3 s; S' P
end
, m: d% k$ K% K' a# ^0 ?, W/ P! oto go
9 N0 q: O- _1 @5 `1 p move-turtles( x8 q$ l1 z2 g5 Q4 \0 T. d6 o; f7 r
eat-grass' l# b; l- f8 N) N1 W! J
reproduce
# J0 G3 v2 ~! S P/ `/ I* ]% w0 O8 q check-death
% }+ c5 c- a9 z regrow-grass' ]- V7 w( b* E( O! X( c
do-plots& _& w- m( }$ g. f+ E
end" D" C8 J4 K2 [# V3 E
to move-turtles
8 @, @' @( f: Y+ p+ C ask turtles [
. i. g# m# U3 p) W, W; A b right random 360 o) w$ K1 n. m4 j
forward 1
' E, M j% \! H5 c+ {, @8 j set energy energy - 1
+ Q: d) B5 s% w7 }6 t7 O ]8 W% Q6 U% o( H7 m- B9 y
end
+ E0 D7 L" F' N! s+ {to setup-patches/ ^6 T( s8 H. y- O; ?
ask patches [ set pcolor green ]
- n- l* c! y& b+ f% ?1 l' mend
3 |( c5 d+ J6 Kto setup-turtles
+ k! `' S7 a# P create-turtles 1006 l& r+ W0 ^' x" b
ask turtles [ setxy random-xcor random-ycor ]
; z7 m$ ~+ ~, u! K6 P! send$ }9 `0 `, m* L) U/ d0 l
to eat-grass- ?( A$ Y7 p( I9 M& m' m
ask turtles [
( _! W7 j9 T( S0 @' p: y if pcolor = green [' I4 H+ d1 o' i6 g3 B' N
set pcolor black
/ j2 f9 L# I# P' W9 [% P set energy (energy + 10)
/ N! X1 K1 I+ L. A- D1 d ]
2 d3 H7 e! X% c8 f; H ifelse show-energy?
; G6 W S# w4 h! d& D [ set label energy ]
$ q0 X9 e- C6 \- c$ T [ set label "" ]
; `6 x& N( B$ H3 O4 k* d' ]7 F ]$ n3 w1 R- P e3 o* ?
end
+ k; E$ t! n3 q7 F# lto reproduce3 W8 x7 S+ o$ ^0 P
ask turtles [2 c" L3 R2 P3 _- ~7 O4 }, z1 g6 g
if energy > 50 [
+ E2 n$ i3 W7 e% _" }2 q' U set energy energy - 50" g {, }, U& l2 U/ L& @
hatch 1 [ set energy 50 ]+ [' n( [8 e6 h: Z6 p$ s+ n, y' ?
]
; E+ p$ V) r3 }1 b+ c+ R4 u ]
3 d# g* H* b- Y6 V' Hend5 h8 F1 Q: r" z. j+ M
to check-death! N, i" p& ^0 u& ~& z' s- I
ask turtles [
) T& L% S5 _$ a; w if energy <= 0 [ die ]; ]- q, H5 I' f* K
] z1 D. m3 [1 \3 t5 p
end
" b; K) x9 `* E; e" R! Q* |to regrow-grass
" K0 p, b* |* @1 M ask patches [
( `0 ~1 @( ~/ Z k5 _ `$ {7 h if random 100 < 3 [ set pcolor green ]$ t" f9 u# t% \1 k. ^' j4 m# \
]
/ u8 o7 P) T: n+ xend
" A1 h* w! z: R+ I! Q% Cto do-plots( G' a" c; v, U3 q) [( @
set-current-plot "Totals"' k8 _& Y0 p0 L' w$ a0 k
set-current-plot-pen "turtles"
! L' G2 P }; j" q3 ]; C1 H/ P- F+ f plot count turtles
' H2 O' n- }# S$ M. m6 x1 R. x8 [2 n" V set-current-plot-pen "grass"4 {2 t, Z$ N1 s, Z3 Z1 ^
plot count patches with [pcolor = green]
3 y. b0 s2 M2 ^1 E. H: h# w$ ?end; A; o2 q' p' X3 W6 ^* Y
可是运行时提示no such plot: "Totals"; J( [; C% L0 g4 B) F( W2 c
error while observer running SET-CURRENT-PLOT
* ~ Y: H6 x, n! D called by procedure DO-PLOTS
& }) G, u1 T4 N: A) B! B$ a" V7 l: A called by procedure SETUP# m6 `2 g5 N. d5 x# h7 C* U
called by 按钮 'setup'
$ F/ p* c5 u/ ^2 P* }3 l求大神解答啊 |