我编的程序如下turtles-own [energy]- t$ `2 j X5 D' U) E
to setup/ c* D* [1 D, D) L& h! e
clear-all6 u9 T. r0 p+ E! y8 }2 ?. ~
setup-patches# F, Q4 i: c& L% h9 V
create-turtles 100: E+ m; y4 S$ Z# C) p
do-plots5 f K, k+ t6 l6 Y. m
ask turtles [ setxy random-xcor random-ycor ]1 P: w% z! l* L7 J: }+ T# i
end& c2 o* W, W; {3 Z6 U+ B
to go! D1 U, ~5 S- C9 A" F3 C! w+ I
move-turtles8 ?8 D! Q* |5 E4 o4 D. C& C
eat-grass
& F. R& L. V- c b0 |! a reproduce
; C0 l/ }$ [# U check-death
5 w& C8 X' G9 |; d$ a S% U8 w2 P regrow-grass1 ]" L) x1 \ l1 P3 s. Q; H
do-plots. K3 H$ ^9 h% G O% `- t
end; I. w6 n! k8 i6 q. j) A) _
to move-turtles5 ^# X1 D$ N8 J2 R6 M3 S+ X! B
ask turtles [5 ?* f. ?7 i5 x G4 |
right random 360
/ t: f$ Z- m; J8 E$ a6 G" L forward 1
( h( p7 r. O7 K: r: y8 z set energy energy - 1
, u% Z) ^+ u. x. T- k% ] ]
, B- Y( J% c( z% {+ vend# r9 }' o: w! P
to setup-patches
# } q# F- e9 {% I; q/ L! \7 \ ask patches [ set pcolor green ]' y5 I5 U; ?4 Y: a( ~3 c: T8 R4 t
end4 ^, O2 v& z: q! m# b) S- w* q" | \& d
to setup-turtles
. F: P( O; r1 H5 z7 I create-turtles 100( L6 ?7 |+ G: J; p* y
ask turtles [ setxy random-xcor random-ycor ], X8 C: M3 _! m1 N4 H4 V) b
end. `- L9 ]! A& p8 c @7 y
to eat-grass# ~% w+ Z5 \& Q' o
ask turtles [
' c4 i' o. ~+ d( ]- f" m8 U" w if pcolor = green [) z0 ^7 W+ A, D# }
set pcolor black
' R0 m8 Z- M$ o/ z" p% Z6 c. E+ X# u set energy (energy + 10)
! H, W l6 n% o% u0 D ]
' u. R9 @; P" {1 b: n2 E ifelse show-energy?
* F- |5 c7 \5 F+ X5 _ [ set label energy ]
3 j' V# `+ g* y$ H4 K. U [ set label "" ]* o0 @8 i0 S5 [2 b! @- \
]( S, V% X) u* [6 G& A. v
end
! _- ?+ P" G; B( {5 Bto reproduce& L2 { t( B# q& O( G
ask turtles [. k- ]7 x+ y! H4 P2 a% l3 [* i
if energy > 50 [
5 B& m5 c9 [: M& P0 J set energy energy - 50
- _( R* X4 _$ s1 x: Q w6 J: J hatch 1 [ set energy 50 ]
/ j0 X: B4 V/ ^) d p ]- q9 |! V; f9 \, L( Q# ]3 D
]
6 ]! f' O5 _9 @5 h1 Hend
' K& Q/ H, P- O8 I! ]to check-death
2 T4 N: o# q' b6 {! I5 A ask turtles [
) a. x6 u+ U0 G, h6 N if energy <= 0 [ die ]
% G# g5 T" x ]' D4 Z# x( n ]7 P9 t9 x$ t% ]7 z0 O
end
% i% g8 G* f7 q7 A( G: H Oto regrow-grass/ X) @; D; I2 J- [6 L
ask patches [
' Q3 m, x$ B; e- r$ b. q if random 100 < 3 [ set pcolor green ]
' a M$ K$ G1 g: A5 V ]* {+ f8 v- X1 X, ]* _' l! m, R
end
- }; r4 r& B2 w8 @, ?& k* Z6 Cto do-plots3 F% _8 z4 C3 k S* I7 w9 Z) U, L
set-current-plot "Totals"
; F' v& y2 h% i* k* x5 K6 A set-current-plot-pen "turtles"- _( F! W, \! b
plot count turtles
/ V D' G" g; u0 e' K set-current-plot-pen "grass"* u( v, ]6 Y. j* y' ~7 ^8 x
plot count patches with [pcolor = green]5 U; J9 j0 I+ m4 L$ ?4 c1 ?
end2 g K2 X: a/ X* G: h* s
可是运行时提示no such plot: "Totals"
) k7 F& l4 i! R: Perror while observer running SET-CURRENT-PLOT
+ |% d$ B- B- x$ u called by procedure DO-PLOTS
( W& |" |" j3 C0 L1 V `' e* W called by procedure SETUP
0 c* I0 q: f @& h1 X: C called by 按钮 'setup'; m2 ^ \5 l0 g5 E8 ]$ W% w) m6 h
求大神解答啊 |