我编的程序如下turtles-own [energy]
# f1 h4 v3 v/ _8 E' k3 e, @- n0 Wto setup* h* k2 k7 q" i% a1 J! D
clear-all; y- U) w1 ^# [. j2 z
setup-patches) z0 K1 ^- k a+ ]2 }+ h
create-turtles 100
3 G$ @4 m, L# h do-plots
9 i. I8 |6 j. O6 I ask turtles [ setxy random-xcor random-ycor ]
$ Y5 m# Z8 Y+ R6 Z, zend
# b o; Z" t; S6 ^$ T9 D0 Lto go
0 ^, @4 k1 d% T+ z% v( K move-turtles
8 S+ w5 d, ?7 P, _; e* d eat-grass7 y' o y( c4 g' {. k* y" Q3 d! e! V
reproduce3 |& F* K- D3 h. W- m
check-death/ ]+ a r9 g0 f8 ~) X- p# m
regrow-grass
5 ?; @5 M a9 N: n9 `6 ] do-plots
' ~! j7 w) h/ d% O7 dend
! ~: v. t, {) M( Yto move-turtles
) M! t2 ~0 s. ?: E9 y/ {8 p ask turtles [. L K$ a0 Z" }4 J6 f
right random 3604 j, b# R/ j3 ~: Y
forward 1% @: e) H8 n- ]$ \
set energy energy - 1+ G! P. a' w& `: q
]* B2 h0 j# V8 _9 ]
end
- Y, ~3 B, p& w {0 eto setup-patches7 w$ A2 {* ?) v2 q
ask patches [ set pcolor green ]: t! Y0 n- T8 k5 r, \
end
* ]; q3 F/ f e4 d2 x3 [) w1 M: Cto setup-turtles
# r% C% R. B# ]; f* o+ u& d create-turtles 100
3 b3 d% t: ^/ W, f) q3 x ask turtles [ setxy random-xcor random-ycor ]$ L: j$ _: ~$ a7 _1 P$ Y
end
7 o2 H- _( K( q7 S }/ Uto eat-grass
( ?6 @+ V* L0 n" @9 Y4 g+ W ask turtles [4 ]$ @/ K8 B& [; \9 y
if pcolor = green [
3 G `6 f! d7 o- W" J5 p1 v" _ set pcolor black) o; H0 S. c& v0 ?
set energy (energy + 10)
8 ~# B1 J6 n. N; ? ]' n$ p" t: [ D( j# j' j. S3 C
ifelse show-energy?
' ~: s# r' w: u2 x% D5 x [ set label energy ]6 j9 o3 r: ]0 ]4 B/ L6 k
[ set label "" ] Z, I' |: f t z- d
]: W8 ~1 U3 S9 ?5 j* s9 s
end3 L+ ?& i8 [, P5 Q1 S
to reproduce
& g% r; |. y& j3 W. V ask turtles [
. x. X9 ^$ n8 f/ G if energy > 50 [ T* ~ q- Y% o$ }' h6 G1 L; t
set energy energy - 50
. L# \4 h. s+ {( C0 \ hatch 1 [ set energy 50 ]: ~4 Y3 ~! I( s N% N
]
5 A2 M* h1 V2 s' p# g ]3 z7 \, T- q4 Y- ]6 N$ a* z
end1 m7 X, V4 j8 y
to check-death# ]; F. D) d' b; d
ask turtles [1 d. ~8 C H" ?8 F$ F x' }9 `& a
if energy <= 0 [ die ]/ f( S4 r8 W! O1 x& ]
]
/ I+ o5 i+ x- q# c4 h/ k iend
; K8 |" h) [) Y1 r; t; N: Dto regrow-grass
s0 N7 v9 N# _ ask patches [
n- Z/ c+ c2 i# C6 `: u% e$ S- f if random 100 < 3 [ set pcolor green ]% u2 t# Z {5 h; @1 c
]( x- g" j7 c( Y9 f
end k" E) b( b2 l" H- x7 u/ V1 l
to do-plots2 I1 z& ^2 Z. {3 H
set-current-plot "Totals"
2 F; Z' r7 t7 `8 h+ `2 ~ m set-current-plot-pen "turtles"
( c& v* w7 N; X9 C& _0 ~ plot count turtles6 B4 X( M8 Q4 g* X3 J
set-current-plot-pen "grass"
% {7 w0 c. r% m( j plot count patches with [pcolor = green]
. N: _: G z, @5 H( qend
# ]9 T8 o( C# m$ q% Y; i4 H可是运行时提示no such plot: "Totals"
% @- ~* U5 y2 X5 d' v# `error while observer running SET-CURRENT-PLOT
/ G! o8 L% ]5 n t0 f called by procedure DO-PLOTS; N* G0 r9 w3 Y7 y/ z1 B
called by procedure SETUP* Y1 b+ A' o5 f/ Q! p1 u
called by 按钮 'setup'
/ x9 Z; g7 z9 A. T" E& U! }求大神解答啊 |