我编的程序如下turtles-own [energy]/ Q6 d% ~' h1 o8 J6 d1 R
to setup& A) w4 L4 X+ c( H2 i
clear-all
$ Q6 I6 a0 w( a8 ? setup-patches. p; B, T! m- C/ v0 |7 v3 S
create-turtles 1005 {' G" _, d6 Q1 |9 r
do-plots" w0 j I( Q( Z4 g* X
ask turtles [ setxy random-xcor random-ycor ]1 D1 z) F) a L2 L' `* m* B
end
" A1 M- y; y3 z3 Bto go
" F% ~; G( c0 j. Q move-turtles
; Y+ z E5 K' T1 L* s! O4 F4 ^ eat-grass
" ?4 v4 Q$ n( y7 w. Y& u reproduce
2 ^! m; [( L% D* }. H check-death
$ M' Y" t2 R/ M& i( q# v2 Q regrow-grass7 M. p- W$ `( k
do-plots* T5 |3 y0 v: g, K) n
end' u. r( n2 F i* n5 a" r
to move-turtles
5 D( n0 y% y9 ^! s- B ask turtles [
% g* J2 k3 s* V8 ^, T right random 360
/ D1 a8 T, s( y& Z# C3 V/ s forward 1/ i' n9 H7 W6 @" ~0 c
set energy energy - 1
* |) K7 A! D3 R% u# s ]
4 m8 o [ O1 O" p& m/ yend! {3 G! W9 C2 V
to setup-patches
7 a! g4 p, h' V9 `2 c+ k ask patches [ set pcolor green ]: K( O6 f: x/ b" S
end' A1 Q. d* ^ d# o/ Q2 @
to setup-turtles
! Z, e2 z/ @( u0 z4 B$ N3 f/ Y create-turtles 100
( E: _8 M* k5 `$ ? ask turtles [ setxy random-xcor random-ycor ]8 D/ M5 p/ v) {* F
end
/ r) t. I# }4 v4 T1 D$ L5 |$ Xto eat-grass/ x' e1 x5 ?" a3 J! i; l& Y
ask turtles [% \" n/ w# \7 d1 e0 h- A% G
if pcolor = green [
+ C* x7 O3 k$ d5 \5 Z4 C set pcolor black9 A O5 ?7 s/ s l0 G7 j
set energy (energy + 10)$ ?) C4 L% b# z: ]. C
]5 w" e/ ]0 b! R' |$ q5 I( g
ifelse show-energy?
" E5 m' ]5 _/ l [ set label energy ]. k, @! a2 v* ]; P
[ set label "" ]1 L) _( D# Y$ ]( Z3 t
]
V8 [/ n. L+ X& ~3 G, Pend% j7 x' }4 q J6 r
to reproduce
% h$ N& @2 Z e2 K9 R ask turtles [% R$ {1 n* H$ X6 y0 _6 `0 O
if energy > 50 [
7 _- {4 `( L( Y- G! {, Z7 z) l set energy energy - 50
+ M* p, I! L7 K, ], O; Y8 e hatch 1 [ set energy 50 ]
" W; I+ P2 i9 d6 V3 Q* b; G$ \% m$ o ]" H3 p: j- N$ ?# ?- h* y; V
]( h' R, {6 ^) h; ]9 p
end
; H- v! W" L$ }* M& z& `: Ato check-death; [. T* h2 u' [6 E' T8 Q
ask turtles [; N9 L, i9 c% Y# Z; @% @
if energy <= 0 [ die ]
) U) H1 J9 [& _9 g ]
9 d4 B0 v% _, B8 [4 X! lend
2 y! s) ~& D- @9 o+ b& W3 M, |& D/ Zto regrow-grass
2 B) b. s' _, `% S8 k ask patches [
) `0 A- t4 V5 m' P4 n4 f2 i* n if random 100 < 3 [ set pcolor green ]
4 }4 S6 |" ?2 [4 z+ ] ]
0 \' y' D# M( L9 E, [9 Send& E1 d' k( A9 j3 c7 T2 B# d
to do-plots. ~* s6 c- U' S
set-current-plot "Totals"6 `9 Q- h' j% P
set-current-plot-pen "turtles": R% C3 k! }) k) m
plot count turtles
& ~% d0 q! B$ H: S7 U6 D! ^ set-current-plot-pen "grass"( V( q, P& K1 @
plot count patches with [pcolor = green]
7 {3 l! i+ {# z4 R$ H% qend
1 B: k+ G% ~1 d7 [) A5 z$ C可是运行时提示no such plot: "Totals"; _0 S8 q1 K+ {5 e5 Y* h6 F
error while observer running SET-CURRENT-PLOT% @# P% v" t, z; V) `5 R
called by procedure DO-PLOTS
8 t* \6 S1 [$ j9 S! x4 | called by procedure SETUP* y/ [4 @0 n8 T( j1 q0 c& {
called by 按钮 'setup'
4 d0 u% f" P# p4 T) i" y求大神解答啊 |