我编的程序如下turtles-own [energy]/ C; b3 D4 s6 y/ P+ B" I: W
to setup
6 y7 ^% X7 G! R/ S clear-all$ `% |2 ~& B: c
setup-patches! z+ C- d3 ]; \& P& D/ c, [
create-turtles 100( ^5 E- \; k d
do-plots$ u8 F( O* l5 S9 }+ o3 I9 r, j
ask turtles [ setxy random-xcor random-ycor ]) E* S/ g/ I- Y: A: G
end
: @" F9 T& D- g. H/ D$ l) G6 pto go' F m9 ]; v }& A* r
move-turtles; Y1 Y) l7 l* G; y
eat-grass
/ o5 Y0 ~& F) @8 [7 I. t; j, @ reproduce
4 M: j* }- Z! M: B; o% s check-death, w+ J& D; @& E+ I$ w( |
regrow-grass
+ {" O" w( W0 @8 B8 K5 A do-plots1 m- [; c- V/ [% k
end
4 N; |! W* j; tto move-turtles
2 P: e5 F& A9 @' Q7 S& A0 e: a- e ask turtles [, R* J M* Y K& o
right random 3601 X( E2 O+ m7 _) h% ~1 H
forward 1# M. L5 w2 d) h) Z4 E m
set energy energy - 1
6 Q8 J5 k7 h# \9 l5 K" P8 G ]
: N# T; `/ D7 J5 T/ Eend
. U2 O. B# s# P) Mto setup-patches1 q( a" n% X. L9 e
ask patches [ set pcolor green ]
1 }2 B0 f, n Xend4 z" ^1 ~) u/ b9 G/ `
to setup-turtles
/ f2 A' H4 q! Y1 v+ o& ]) x9 S { create-turtles 100, ^. e! ]4 w" ^5 F& F" v
ask turtles [ setxy random-xcor random-ycor ]
% | e0 L ?. y3 [7 l: ]! u' lend
; o* M& o7 J- M( H$ rto eat-grass
( \- v% k4 \/ k- q ask turtles [
1 F! a+ g3 r2 J$ q7 P- f3 d. ` if pcolor = green [
, |( t# J& b+ e set pcolor black; Y$ m2 x- D1 C8 G
set energy (energy + 10)
! B3 L- I, {2 ]" ^ ]
" h* D0 }0 C* B& | ifelse show-energy?
8 [- B& v, D0 K) X1 J [ set label energy ]
/ K# s/ G' d; c! @8 } [ set label "" ]2 B. T# Z2 ~% Z% M. v2 W0 G
]; g+ B: e) W' T1 F+ ^
end
* S8 k( _# q( z* i! m$ X4 bto reproduce% ]3 c( L* s' P- M4 I4 x* W
ask turtles [
4 y" R" ]4 i ?* t9 k- k" X& X' M if energy > 50 [' z! L O. a! o& a; u
set energy energy - 50
! I& ~3 I) X' m6 w) H- Z- {1 j1 B9 M hatch 1 [ set energy 50 ]% e) W0 V5 ~% |. c' P2 Q, U0 ?2 C
]( m8 q+ ]0 x1 S2 y7 z" j
]: ^# a5 G+ I ]4 n0 |' Q0 k
end) h- y/ x2 l$ r5 z' J
to check-death
5 x1 D5 n$ {& E$ ^ ask turtles [4 P2 e6 h; m3 G* [' ?
if energy <= 0 [ die ]/ x0 v9 ^% G C- m( r: A% c
]
3 M) W* N0 G2 ]/ Z% Cend
* H3 d; o$ O, |3 t, `% Z) e1 Oto regrow-grass
" {$ I2 }* \9 B i+ ]# E1 \ ask patches [# r1 t7 W/ d& l' t( \: b0 L, c, ~
if random 100 < 3 [ set pcolor green ]; ~7 T2 l0 T q' k1 F* H: r* ^
]! y, P, ~& r( g$ f
end
* t6 s, v _% j N* C% gto do-plots
) J4 P3 O) G9 N- N9 ? set-current-plot "Totals"
1 `! C/ x/ G! t- ? set-current-plot-pen "turtles"
2 ~* e4 A3 R! {; T0 |; O plot count turtles
0 e6 n. p- A: @3 v* f' J: H1 @* }5 w set-current-plot-pen "grass"; {1 g1 n. I" i1 Z9 W
plot count patches with [pcolor = green]% K8 B! ]$ n. R: V! u, J% P
end Y7 w+ e3 s/ k4 T) V9 F% V5 b' @# R* F) W
可是运行时提示no such plot: "Totals"
$ W$ A; g+ Z6 `) T/ v, rerror while observer running SET-CURRENT-PLOT
e* y7 ]/ m3 t/ @2 H called by procedure DO-PLOTS
1 `$ Q4 j0 U' }9 c; Q& o! F called by procedure SETUP) v5 z1 v1 e: c- l7 ~' U* A
called by 按钮 'setup'
' v/ B# h* A. E求大神解答啊 |