我编的程序如下turtles-own [energy]* \' B' l/ H9 ]7 g* }7 M, `; y' U
to setup
+ o8 j, g. l+ A5 n M* R# m! z clear-all
& m! Y( t% p4 C1 ?5 a$ f8 [6 J setup-patches
" ^/ P. Q: V+ [; u1 b create-turtles 100
! R; a% f4 W6 c do-plots; H; y5 S1 y) `7 |
ask turtles [ setxy random-xcor random-ycor ]
5 \/ ~ r8 X- p( Q; n1 send" w; B& G- f1 ^
to go
2 c1 [0 M" y0 c9 |# _& V. I# R3 {; U+ R e move-turtles7 S( B5 ? U$ m# j7 O/ c) }, r
eat-grass
6 o/ B" s4 ^+ Q- r; O- P, i reproduce
* R* a8 a% c7 V3 r check-death) p. r/ E$ b6 n- G
regrow-grass
/ q( R" ? i" Z. _2 d do-plots
) u4 a, J2 f9 `4 F0 vend
3 ?/ @, s4 ?& |0 _to move-turtles- x& ] m# M7 v" C
ask turtles [
0 S4 V2 [3 Z1 o( Y1 e. K; u3 s right random 360 y7 F C( R- R d9 L
forward 1
/ E0 O: B& i- }$ l6 d set energy energy - 16 [* P* L3 C: \' F0 K" B6 h
]
* b. o( Y6 q" @" H$ H. Yend
& t& E# S( O5 @3 O/ X' A* Mto setup-patches Z% }* Y3 K# F; N- J8 D
ask patches [ set pcolor green ]
. I4 ^ w$ c" m {( D) w6 Lend. U7 M3 _1 L* o. ~! v
to setup-turtles
2 @+ a+ K" ]) Q2 ^ `$ f create-turtles 100. t/ T( G# k9 C2 w Q, M
ask turtles [ setxy random-xcor random-ycor ]: ^! Z( S3 b5 H- A5 P7 r
end
# P( d% V1 h& I$ w3 h0 G$ a4 hto eat-grass- h) F+ B" w! k; ?; R/ `
ask turtles [1 J0 |8 j y" Z9 ^
if pcolor = green [) u: p; d& {- O7 U
set pcolor black e) D% i' V' a8 f
set energy (energy + 10)/ ^! {; p2 [& d4 O; [
]" J+ A" B: W& V0 I7 h2 q9 T1 H
ifelse show-energy?7 v$ H% x+ Y4 M( I
[ set label energy ]4 h( B6 L% B: Y$ A; H
[ set label "" ]' A/ {. k# K0 ^" |
]
% Y& C5 E: Y! S/ X) |6 `2 r: Nend* K" o- t4 c9 h' `1 c0 e
to reproduce t5 x/ A4 v. e# l+ R3 r' m
ask turtles [2 w( F2 u" x, j7 f1 x
if energy > 50 [( x4 Z7 [7 u* M, A1 [
set energy energy - 50
7 l. z/ L, s: b1 V# C* M hatch 1 [ set energy 50 ]5 d* _. |4 o/ _
]
; H& ^( A4 I+ y$ |. j ]
" F' j+ o2 o# q' B ?end
( e# q& P9 n |. G' h1 H+ mto check-death
# E9 v4 T2 {$ f ask turtles [! i1 ]; N3 t2 \1 q/ E- W4 [
if energy <= 0 [ die ]7 A" W' c# s4 b5 M) q; u2 H
], @( N! r+ T4 n( I
end
8 Y3 x6 `- J& d; [6 uto regrow-grass
. s# c r e/ t: V3 N ask patches [5 j$ n# r2 ? H. e4 {7 k
if random 100 < 3 [ set pcolor green ]- X" V! F8 f1 ^! D/ ~
]( q5 c' ^- D) n) P* f
end2 b( E! R$ f l) @) G0 A- C, r
to do-plots
o" P& p& L/ U set-current-plot "Totals"
+ l; _0 a: I# t8 ]+ s" O& L6 g5 `0 m set-current-plot-pen "turtles"
. q9 T7 o( A% B* {+ r7 z* g/ ] plot count turtles
4 A8 l' ]3 R, A/ ]/ \ set-current-plot-pen "grass"0 w5 a0 }& H* q/ {8 D
plot count patches with [pcolor = green]! }3 o! W! [# p/ s# {
end1 f1 o& C1 D1 g Q3 ^/ s: v; V& y0 S; r, U
可是运行时提示no such plot: "Totals"
" j1 a1 ` c! ]6 Aerror while observer running SET-CURRENT-PLOT
* M- J& K) J+ E6 b' q called by procedure DO-PLOTS
! U" I2 K! s! @) r% c2 A5 { called by procedure SETUP
2 l4 _5 I* w* h, O called by 按钮 'setup'
# I( @% |" E7 z# u+ ]. R4 }5 F求大神解答啊 |