我编的程序如下turtles-own [energy]
7 J$ ?* l9 t6 _2 vto setup
* k4 U3 B/ Y/ X* i) ~- X clear-all
, r! K9 ]' q' S8 J setup-patches* z! ~ ?1 z& }# h% K: z( M0 G) |
create-turtles 1008 M* h5 J+ ?" e. j c$ R
do-plots; H) t+ L" W+ I! y/ q
ask turtles [ setxy random-xcor random-ycor ]( r5 z# [) Z$ w! B+ n( U3 |2 f
end
5 G- K- z/ n- J, H% @4 [) b% M% Pto go
: {: j. J6 j6 L+ N( o move-turtles2 \' U6 }. U# H, P7 e$ q. F, O
eat-grass
$ \, ~0 a8 h) i# X% c. \ reproduce5 Z9 s w+ w& E* P4 L. t
check-death. L, ~1 M+ A1 X7 q; z7 c
regrow-grass& @* S7 D. k& |/ r/ j9 O0 H
do-plots' k7 i; @( ~; H8 O' [0 w3 G
end
# y S; v: T& i, {1 F' K* dto move-turtles
$ N5 h; ?( |0 T/ r3 p ask turtles [
& Q6 m' F0 ]8 o right random 360
& l6 d; `' Y; h) s- |4 a9 G forward 16 x" y9 m* ]& W8 A% l
set energy energy - 1) m, E9 p9 U% f. o5 o
]
6 `# I: Z0 X7 I" k$ N3 M- Fend
& \: |5 a% B3 g& eto setup-patches
5 _" j; m/ y+ H; ]( ~ ask patches [ set pcolor green ]
0 T) ^+ q) o+ N& e. [$ W/ F) z# dend- n2 D9 p m V5 E3 }
to setup-turtles& L/ [/ O3 d, Y" \2 m3 U, K) N
create-turtles 100# Y# ^; v3 |' O; m
ask turtles [ setxy random-xcor random-ycor ]
8 ]' ]: j/ R# C% I. u. c$ b9 Q6 J( o9 \end, _3 A# L) d1 `/ T# b7 H
to eat-grass
/ m3 R" i7 ~2 T ask turtles [
- @8 h% [ l6 g if pcolor = green [
6 l' y8 t5 M9 o2 L% d2 ^( L set pcolor black
4 M6 Y5 x. D; l set energy (energy + 10)3 ^, s6 g" k5 e2 C: K
]
! I6 W2 N3 k2 _; D ifelse show-energy?- \; `* Q3 U" P* b4 R! X( u
[ set label energy ]
4 I) d W! G; A [ set label "" ]
T2 l& ]" b2 O7 D* r ]
" {. k- h' O+ q' y. m: R {1 fend0 ?; Z( X, k$ W9 Z6 T
to reproduce" f' |& U" T0 ^3 s. x
ask turtles [# v8 l1 E7 b1 p" s9 l
if energy > 50 [5 w V. [' j- b+ L( s* ~
set energy energy - 50
, \# @1 v( g, c$ b0 z1 m hatch 1 [ set energy 50 ]% `9 B I, g0 Q( Z
]7 I2 H, A6 |; D6 c4 c8 F
]
' Y9 o/ G( H5 c2 X0 u2 mend
$ m" `1 L7 W1 g( K5 P9 ]+ O. |to check-death
3 @' g8 i/ y. Y6 R ask turtles [2 j, n3 ~5 L6 b+ L8 X2 ~$ h4 e
if energy <= 0 [ die ]
8 Q- ?% `5 a4 Q& b ]7 B% k8 E! C9 w* y5 Q" @
end
0 q9 d! l; P0 f/ T1 ~4 T5 Fto regrow-grass
! G3 [8 u3 k. B* b- Z3 L ask patches [( `( ~. M9 C3 s" ~
if random 100 < 3 [ set pcolor green ]: H6 v i% u, t" A( y, m
]4 a# U, q9 }3 ~9 N% W' V
end
" J7 G$ b3 m6 f$ G7 ?, d" l% y# G- vto do-plots
3 T1 C5 R- s- S) F) K( N _ set-current-plot "Totals"* b1 l5 |- z6 C* t" Z3 Q2 [
set-current-plot-pen "turtles"
# ^" ~6 }1 k5 M2 Q! K2 f& {8 [+ } plot count turtles( E b8 `3 t$ G7 |
set-current-plot-pen "grass"7 c5 Z5 Y5 B8 h4 i1 M, _" E! W
plot count patches with [pcolor = green]; [4 w; l8 m% ^% `
end$ \: A+ i8 C1 ~1 {+ @
可是运行时提示no such plot: "Totals"
7 k6 Y) P* g3 |9 n+ @% ]! berror while observer running SET-CURRENT-PLOT4 k8 R) y* T% L" j% p0 O# s9 x% {; ~! \% S
called by procedure DO-PLOTS+ [9 A$ e' ^, x, n8 q; Z
called by procedure SETUP
2 k& r! j4 f6 q2 W4 y( U called by 按钮 'setup'" l' P" M8 R+ c
求大神解答啊 |