我编的程序如下turtles-own [energy]
$ ]* Y) O2 ] Q3 a- G$ s- h$ Wto setup
4 Y5 l# z8 s; d5 h- u clear-all
9 n W7 P% z) A& e setup-patches
4 H) v: m: z, v* I create-turtles 100
# e( f8 W) x8 | do-plots
5 \% A5 ?9 x. B ask turtles [ setxy random-xcor random-ycor ]* c2 y( y0 ^" D- d ^6 `; L; p
end) @2 H4 g" k& }' W2 [
to go3 C w3 o0 |: h% H2 x8 j! a
move-turtles2 c* A+ f+ s& m+ K t5 ?: v
eat-grass
! @# G% @* l$ v5 Y2 x w reproduce
! `! q3 R( A2 A7 Y4 t' A! Q k) H check-death
! Q$ Z v, l- O3 Z' w1 Q7 b regrow-grass9 D5 s& `) t) V" O2 J
do-plots
+ {' C6 A7 A$ j, W3 W. w% Rend# Q; c# d- z. {
to move-turtles" l, R% E0 B7 n) a
ask turtles [
$ n/ `& k. o7 M$ o9 j$ {+ C2 ] right random 360
; l1 V& s6 G9 z b forward 1( }( K' f3 x) a
set energy energy - 1) b3 k6 s" f. m6 \% S4 m/ M
]
* c6 N- L6 @) h% ]" Wend: Z6 ~0 M+ }8 z0 [* ?) h) C
to setup-patches
9 w4 f/ E' ]& W ask patches [ set pcolor green ]
7 T( o# R7 `9 ]& Y4 W# Aend
# M0 P& ]7 S# i' E. V5 `0 E- C, vto setup-turtles
8 N c/ ^" p3 k3 f create-turtles 100( ~- ~& i" z6 h1 h; t+ ]/ G
ask turtles [ setxy random-xcor random-ycor ], W x5 S# @: O- O; X3 [7 i
end% E* t* @2 u0 A/ C; j; z
to eat-grass/ |. i+ m% G4 ^. y1 s0 o, J) s. |
ask turtles [
$ i( M8 z# |8 C6 W7 o if pcolor = green [
3 d- o3 {( o) f& g! e8 w set pcolor black
' W4 n7 V8 P# o set energy (energy + 10)' M( L& N! R% l# ?2 i* r6 v
]
! E! r- _- [) p& B ifelse show-energy?: y! z' O' C2 N0 i" j" {
[ set label energy ]
( Z- u( |9 z. g9 R4 H% ?& \ [ set label "" ]
1 ~( M3 ~. q0 Z! X ]
3 @6 U- f7 ], ~+ t9 ~# fend! [% m( o! Z ^ p0 m9 C
to reproduce3 n u7 y( H, l: G
ask turtles [4 p# o! v6 U0 c s+ T
if energy > 50 [
. ]. S( \ u, N3 \% @ set energy energy - 50' c! n" b, U* Z7 W- {1 C
hatch 1 [ set energy 50 ]
5 l8 L$ O5 f3 E; f$ l, E5 V ]. \! M: A% ?4 f% m# E& s
]
! t- e7 L& e- G2 Yend0 h8 ?. z/ A6 O/ R" h0 a$ L% b4 H
to check-death
, Z& f& L+ [% }1 Z1 ]+ k4 W' O ask turtles [% Y- n6 ~/ q0 D& y4 K
if energy <= 0 [ die ]
2 \, J1 x+ M0 ~, Y. i, w8 _ E ]
4 {# d3 N7 v9 S% lend
: \0 s# o& t/ Bto regrow-grass7 E5 f* F* F j! b8 h) r0 l
ask patches [
: c: O: G4 B& e if random 100 < 3 [ set pcolor green ]) A, W$ i- R- L+ \" H
]
7 b" R0 a& S# ~2 }- B) t0 C% z& ]1 Aend
$ w# v( {9 n" E6 r9 X& M6 Bto do-plots
% G& Y4 M# U3 u! L! }6 z& D set-current-plot "Totals"; u" B2 ?. t# m( {6 ^
set-current-plot-pen "turtles"- _! ]# U8 t1 A4 o6 }
plot count turtles
: a+ ~; P2 {6 ~$ e* s8 B set-current-plot-pen "grass"& W/ a7 S; N- x0 {; Z' N* z9 A+ m
plot count patches with [pcolor = green]
0 f" Y! D7 }% k- b4 Nend
4 s. d% m% {0 W- a可是运行时提示no such plot: "Totals"& P6 X+ D) I- f1 g8 q* ?
error while observer running SET-CURRENT-PLOT+ Z& }+ \, h2 E, a
called by procedure DO-PLOTS- z, M% C2 H2 g9 ?6 _6 l2 M
called by procedure SETUP d p1 d1 m. k! Y; L, U% I
called by 按钮 'setup'. U& s" P/ _3 m( \3 G
求大神解答啊 |