我编的程序如下turtles-own [energy]$ C* B0 V! U7 a! S
to setup; u" w+ M, U& w4 R
clear-all
5 ]" o- k" |* I! o* V setup-patches
: ]4 s/ q3 ]( F9 u create-turtles 100
& T0 t" h* _' z+ Z do-plots. s3 P% ~5 D% L! c6 e/ `
ask turtles [ setxy random-xcor random-ycor ]* {- @ n/ a9 K I
end' M/ C& ~8 d6 g Z0 t
to go; V$ m4 Q, r. s' ^7 z% g
move-turtles. z- ], u1 c" y; n" I1 i* n! h
eat-grass
. b' U7 p/ {3 g; C' S0 G i% z) J reproduce( E6 g/ M, m; h: G
check-death
6 R9 T: p/ L9 N+ S regrow-grass
( ?! G5 E" S2 Y I7 L4 n2 k7 m do-plots8 o3 H( i7 p. ]7 B( t- a* |
end6 \. u: o9 E! k8 i1 t/ t+ Q3 N
to move-turtles; _& N; P# p, w% k$ L
ask turtles [
6 R/ G# @8 s2 L; a right random 360
. x$ D ? s, P" X, r( @! j0 ] forward 1
$ R' L' v: ~' M+ L set energy energy - 1) k3 Z8 F& |" e( r
]
5 P% o; U" m" `" Tend
! k. _) M2 m$ ]9 ?& e( dto setup-patches
! M# R) Q8 U8 i g0 |0 U3 ~ ask patches [ set pcolor green ]
6 _; ^& J3 G5 D0 Vend
# }8 H; M5 ^: x xto setup-turtles
9 u* X) X7 y* l; O4 D create-turtles 100# m7 a8 Z* \1 F# r3 L
ask turtles [ setxy random-xcor random-ycor ]4 L0 i4 O4 E6 E/ l
end
8 V$ S. {4 c: q; uto eat-grass; x+ @. u$ {: U, E7 }
ask turtles [
' m1 O5 ?8 @0 g/ B1 x) s2 X if pcolor = green [
* h1 C" L1 k3 J# m" z8 p set pcolor black
- j x: i* @$ S# D& u6 B set energy (energy + 10)
6 P3 I# S" x& n+ K' I& s4 g" O1 ] ]. A" x( k6 y2 s7 Y3 k
ifelse show-energy?
. }9 T" g: i1 M# G4 M, u! d [ set label energy ]
S, P A+ B6 m& d7 V( y3 P [ set label "" ]
& x5 ^( L G0 w2 | ]
( j4 H9 R1 N) D4 @2 D8 \end; Z7 |- p f4 H r
to reproduce
7 B4 L4 t1 A- X) N. \ ask turtles [; r+ _- P) W* ~- f4 N, b
if energy > 50 [
( V. X: o( G4 ^0 l" m% p/ L$ o0 G set energy energy - 50" X( p- c6 ~3 u) m
hatch 1 [ set energy 50 ]3 {' ?6 v0 b' ` V( r) s
]
! l! x' K/ D9 e1 R- h ]
& ~6 ?7 S" e2 ^4 J* s" Rend
. ~7 W4 P0 H9 eto check-death {. Y% l& b3 K0 d6 J6 Q% k/ [
ask turtles [
6 i0 t( F) F- Y- |( q if energy <= 0 [ die ]* F8 w3 ^: K0 w" B6 s
]: ~. ]3 d1 P4 c" f5 F
end
6 C; Y+ I# q! S% B3 {6 ? bto regrow-grass# l$ ?" ^$ }0 G/ { r
ask patches [
4 |- L* ?' K& z. Y' D if random 100 < 3 [ set pcolor green ]
2 o2 T0 O! I1 _. [4 y8 @! [% o7 g ]0 J2 I5 r7 p. s4 B( N
end" X* L3 M0 y* D* {$ A9 U/ _( ?
to do-plots
# N' z' a3 {# I$ X set-current-plot "Totals"
$ \- P* }8 l3 T* Z9 C" P set-current-plot-pen "turtles"
- V' y1 ]: W2 R! I" h) z& p2 R7 j plot count turtles( G/ ]% l" N! J6 C8 y7 F
set-current-plot-pen "grass"
8 G, u7 _& {1 P1 L3 H. _. | plot count patches with [pcolor = green]* t. k. _( T2 {, t4 O7 l
end
) B) J' f" J& I5 ]. Y* u可是运行时提示no such plot: "Totals"
6 [. L' m2 A. N+ B- lerror while observer running SET-CURRENT-PLOT
8 P: a( E) M1 N9 T) t called by procedure DO-PLOTS c' v! H# p0 o
called by procedure SETUP
6 Y2 Y' V7 K5 o! V7 ? called by 按钮 'setup' V/ Y& l9 B( E2 ]2 J- ]
求大神解答啊 |