我编的程序如下turtles-own [energy]
: |9 n( z" m2 Tto setup
$ l+ s& H7 _- v4 M clear-all
, {& W) F. O/ `+ Y6 M1 b ?) r setup-patches& X1 U7 ?2 n& q: \: N3 P
create-turtles 1004 M: I! o. H1 l1 X. g! ]* V1 k
do-plots
8 v: I' p- k; `6 Z6 p0 r3 n ask turtles [ setxy random-xcor random-ycor ]
/ H5 ^# N+ a. S2 x2 d* K7 nend, x# z6 J+ s Z1 t& E6 r
to go- @- c4 e# x# t ]
move-turtles
. C" Z9 p2 b) L6 {8 {; s eat-grass4 T0 [. K3 C3 c8 X/ ?3 \2 k
reproduce& |! e) H( \) w5 t# E2 Q/ T+ w" v# a
check-death
' D* l6 S1 J" \& v/ N& F regrow-grass
$ t5 R; K( H: N a3 _6 ` do-plots
9 j2 @# I' G! |! f4 {end
. d# G- x- T: M/ E& O# Dto move-turtles: l/ n k6 W/ y, ^1 _
ask turtles [4 B0 z0 D! p# U( j2 @6 J1 J9 r
right random 3604 {* T; p+ ?" T% b* z
forward 1
; D) J( _0 \+ ]( O$ t set energy energy - 1, c4 e/ T- [) ~" o2 x! v
]
' {( C( d9 R4 `; H. F2 Uend
! {' r9 F5 b1 X. ?8 J3 C4 Fto setup-patches7 U) L/ c0 S5 D: H
ask patches [ set pcolor green ]
5 z9 K) j: W7 z0 iend( O# w/ M, ^$ e) r& d2 w
to setup-turtles* R1 _1 ~# x! H1 {+ K
create-turtles 100! r+ X+ s! H5 H" q- m
ask turtles [ setxy random-xcor random-ycor ]% a7 _" [, o1 W3 J
end
# v" g: I( S. b; a5 Nto eat-grass
/ H. Y) g& n7 X# x' H& P, J ask turtles [+ |7 v3 w. O- [' P" @: K
if pcolor = green [
7 D" g! k) {: D set pcolor black
) ~3 L/ d- H) T" V z1 n0 U# N set energy (energy + 10)
. p5 J% {9 S3 Q2 O ]; N, V! ?- y- s7 @$ s3 I2 M
ifelse show-energy?
% r: o0 D! ^4 }( n [ set label energy ]' m: |* y9 ?0 @! ~& n- e, l/ p
[ set label "" ]
) m+ ^& R! [0 P ]9 m8 L: E+ n8 z5 `
end d- a* g; ?* [0 ~* u0 n
to reproduce D _$ M, O0 z# W: ~
ask turtles [
3 m$ Z% f7 C5 x, _+ s) F if energy > 50 [0 y% n" Y" j7 Z3 |# z2 r
set energy energy - 50' S; H) m2 a" q8 J8 H. o% G
hatch 1 [ set energy 50 ]
; {, X6 N1 F" a4 j' h2 I7 I1 f ]
, x+ s% k8 O4 {& V$ ^" j( L' K- C ]0 x" V* ^( h9 M3 W0 Z. K0 k. b
end. B0 S; E. [0 `, o. ~( f$ ?
to check-death! y! v) }, Y! e# C- l$ R( J
ask turtles [
7 J( |$ a" G6 q( z if energy <= 0 [ die ]! Z' C( c# P$ J7 F$ [( _4 u! B. {; `
]
/ `2 X% I" b, L7 |% Yend/ I/ g4 I4 B. M0 J9 @- A
to regrow-grass
( `7 X- D- \. H$ t' p% K& G/ T ask patches [
; T8 v3 \. a% R$ p4 T! |6 y if random 100 < 3 [ set pcolor green ]
* A1 N/ {0 _& D3 M3 G1 u; } ]
" @, s9 L& ?. O9 P7 w: qend, K: X1 X" n( |
to do-plots0 S7 n' ]9 B* p5 S
set-current-plot "Totals", F6 N$ N, N* x1 q9 A( V* B' ]
set-current-plot-pen "turtles"0 m; O$ k2 C2 Y+ L; f$ `% Q' L# ]
plot count turtles
( r# s+ T* ^0 R9 Y* C a set-current-plot-pen "grass"
; F6 C- S3 M0 \6 I$ H. @ plot count patches with [pcolor = green]& @' y) d& J" G/ l/ a
end& o( q2 T2 Z' Y+ ?+ v0 e
可是运行时提示no such plot: "Totals"
i3 }& E" J1 `' y6 ?error while observer running SET-CURRENT-PLOT4 F2 p6 `5 k l" @( n: |
called by procedure DO-PLOTS7 E1 l7 \* W* ?" ^5 g
called by procedure SETUP
W0 l5 B% c* r! K7 E0 _ } called by 按钮 'setup'1 A6 L. r/ P7 A* d* o
求大神解答啊 |