我编的程序如下turtles-own [energy]$ b$ F2 ^/ N1 G1 ?1 p ~
to setup1 U3 D* `- J) D8 K
clear-all
- t+ w* |( S1 G0 f setup-patches
. x) n# @/ M' i: r create-turtles 100
6 R; d) a9 q, Z! e2 G( [8 ^2 J do-plots
' w- |0 ?9 K2 R) v8 I9 G) B, B ask turtles [ setxy random-xcor random-ycor ]
- S9 J+ w$ O: t7 o% k1 ]: Xend$ h: B1 O' g0 U) i# s1 X% F# L
to go
& r! z! w( \1 \5 C, W0 N: y. o o move-turtles
# p1 `2 i5 [3 x; x* f eat-grass
( e6 V" A( R4 J1 g ?! h9 ]8 S! D reproduce& l8 T* \+ h1 L3 B
check-death1 E- V1 E' A$ M0 @( K7 Y- I
regrow-grass$ d2 n1 `9 w. I; @
do-plots* ^2 V. c4 h6 ~
end
' {& U; a- x' Q6 q. |% A5 Fto move-turtles \, Y1 n6 p5 Y( u' K- Y* m
ask turtles [
9 _* H3 z4 a% w( ` right random 360+ F T/ C {3 i% w% n
forward 1
- X6 W: D W- P+ E+ {' F set energy energy - 1 D0 t! q) n" I" ?2 \( y
]/ P8 H+ C, V* q( l' X
end
) a+ R& j, T8 Y9 T2 m8 _) hto setup-patches
A$ n- y$ F2 z& n& n ask patches [ set pcolor green ]4 g: {) A3 @ R! \
end
& j, Y1 x. W& I' n/ m* A3 v% o( Xto setup-turtles
6 R3 z# `; _" W* l0 ?# p# X create-turtles 1003 `# u ?7 _- A+ ]) Y2 X
ask turtles [ setxy random-xcor random-ycor ]5 Z* X" k) j0 T8 z4 O
end
* B5 m- h% i, m) j) r) [5 J% yto eat-grass
- y- J/ t/ k5 c7 D ask turtles [
7 k- n% i% A5 b! y if pcolor = green [0 q8 `4 p3 ~. Q# X% S/ w/ g& {
set pcolor black
3 t0 w6 r) ?6 S. f set energy (energy + 10)
3 C% H/ f* I7 _- N) X8 t4 C ]0 t3 \6 H5 x, U/ @: Z
ifelse show-energy?
& @6 @+ z, u) r% B' ^ [ set label energy ]# w7 g+ H. l( ]
[ set label "" ]2 I" I0 z; J4 J
]: W. G5 F5 F" I: X% ^$ Q
end
( Q/ o' A5 V3 n1 v" Pto reproduce
, q) j2 Z8 v2 U/ {8 s9 x+ Q% c ask turtles [& @. X* g* H, s
if energy > 50 [
& c9 N# o2 M; j" f+ Z* r set energy energy - 50
0 o" R" z* M& ?1 ~. W0 e hatch 1 [ set energy 50 ]. a8 T+ U" W: @9 p z
]
j' b r/ h& |5 e' f2 C, ?4 u6 p ]* t" d* o% i3 @, ^) I$ r5 G
end0 O( H+ M) h; T7 J
to check-death% g1 P8 \4 n& Z& D
ask turtles [! e* u) Q& P: G/ P
if energy <= 0 [ die ]' i: E( D( Z" Q2 U2 a& Y
]1 R: W6 ^7 G- ` M6 l" V: U
end
3 G7 I7 y4 U2 E2 Q7 Y6 v- {to regrow-grass
/ K6 Y- W; W7 l( N3 E0 P% E ask patches [
% F+ U: S8 p3 w) r5 b if random 100 < 3 [ set pcolor green ]6 r( c- A# _( j9 B, M
]
$ T) m7 I- ~3 ^8 X7 b' w1 Pend; h' a: J4 y8 l( t1 ]% ]! n) v+ M
to do-plots
" n6 `7 b6 ]+ n# x% q set-current-plot "Totals"
0 o# h9 d, l; H7 P% G! j2 f set-current-plot-pen "turtles"
& |. N. F0 t- `2 W/ c& W' e plot count turtles
: ]8 K) T- Q# t8 ]' _7 [ set-current-plot-pen "grass"# t1 P7 }: x1 d1 [4 b- L
plot count patches with [pcolor = green]$ D i" |5 q0 K. E
end" A: x' y2 S, j
可是运行时提示no such plot: "Totals"1 C- \6 }% T: q; s
error while observer running SET-CURRENT-PLOT# a$ S W1 J0 J( l
called by procedure DO-PLOTS
: y/ x; {) b5 ~ called by procedure SETUP
" Z) f4 G$ `, v. {7 ] called by 按钮 'setup'
# k% k( e, I2 Y: I0 I, q求大神解答啊 |