我编的程序如下turtles-own [energy] S' i1 q' |9 E$ l% |* ^3 N
to setup# n5 K1 v2 a. B( \+ v
clear-all
5 k! M* J9 w+ y9 H. c; z setup-patches
, o" E1 w, A1 g2 C; i3 F- ~* b$ l create-turtles 100
1 Y2 M0 X6 y8 V do-plots" a/ K# |' c& |* ?
ask turtles [ setxy random-xcor random-ycor ]1 Y( f2 `8 n9 `6 o& U8 R
end# v4 b" ^3 r# J& ^, U
to go
1 c! E" K/ A2 v; B" [1 K move-turtles
( k0 N- {1 [+ k8 O& n' G* O c' m eat-grass- f* D$ u8 D& C* T2 l/ F) [- W
reproduce) Y& Y' q( v3 v+ d
check-death
% d* F+ D. {, [, h8 Q9 @! L regrow-grass
, d- T; ~+ P. G% _ do-plots* v8 e. O2 S: F: P+ w
end5 }- K% W' S; G2 F, c6 L
to move-turtles
. S, Z1 n3 T" l: k5 o" t0 p. t ask turtles [
5 g2 \3 b2 z Q* e0 M' d/ G8 F right random 360, [8 f- j: V7 f
forward 1
2 u7 m& p- N1 v9 ?& d2 W& j4 G. b set energy energy - 1
# t/ G m7 k: W8 d, [* E ] }( z+ {. b( R1 r( y
end& k' R o$ [! @! G
to setup-patches# C0 j1 I0 a7 u& T: J
ask patches [ set pcolor green ]
- S, z- f) T% s. ]end
) ~- J9 J* c$ B& y3 `to setup-turtles2 h3 \( N6 M$ _5 E0 u, ^
create-turtles 100( z. H x- V- y4 }* u
ask turtles [ setxy random-xcor random-ycor ]5 d" w# t* j4 X% I$ l: @6 U2 H
end
, E* |1 } {0 j2 I" M9 \to eat-grass
' T5 ?; f+ [8 A- G0 K$ s ask turtles [6 K9 ?- L4 F; s! J
if pcolor = green [4 E( \# _1 }- A! T9 Q8 c7 L
set pcolor black
, P. p# c! I# L) c. |" X set energy (energy + 10)
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ifelse show-energy?
. Y5 c. A3 o* O* B: D [ set label energy ]
( o6 h# g+ d7 l, y [ set label "" ]
, Q: D$ ?3 T3 V$ |! i ]/ h7 `+ @/ U I$ {7 [5 @
end$ h' F0 N' y+ N- y! r% T& v
to reproduce
7 p' ^( d( Y$ O' ~, k% `' {7 N ask turtles [
- e$ W( E: L! N6 L0 t$ Q @ if energy > 50 [1 M0 y5 ?, f" t3 n) z
set energy energy - 501 W: ]3 e; ~& g
hatch 1 [ set energy 50 ]
8 e7 b( r! q4 F; y. c ]
# x4 V1 L, I# u. a2 l1 |! n ]* f5 S7 x) m Y/ N* {5 [8 c
end
4 y) P7 Q9 j% C, p0 V! G/ v" ~5 Gto check-death. K/ y9 H$ X( L' }! [6 i# O/ d
ask turtles [
8 d- l, s3 H) p, l if energy <= 0 [ die ]
" `* u# ^4 v% q9 |' {: | ]
Q2 G* X4 N5 D4 {3 vend
# q' \ m* @5 Z- x4 V( y; mto regrow-grass. C) ?! M" C: z& S3 x
ask patches [9 z2 U, _, R3 l- ]& R$ t9 }8 e( M
if random 100 < 3 [ set pcolor green ]
1 D6 F) w C8 S a" C6 t$ R/ E( m ]$ ?3 Q0 \. M4 t+ C8 L6 l! J5 g8 m
end- F3 l- N5 T+ a8 I. _$ M
to do-plots$ t1 G# ]( H. J( J, M& R
set-current-plot "Totals"
3 J6 c$ T+ b. U8 T- I, { set-current-plot-pen "turtles"7 A) h; `2 E6 S4 O7 o1 |. d2 _1 @! L$ I
plot count turtles
! z- @2 e) I+ o% z } set-current-plot-pen "grass"1 [ A" U) C6 v, _/ |. M
plot count patches with [pcolor = green]% G: R4 g! b8 w$ C
end3 Z5 D8 e' T8 K/ @3 Q# r" L6 q- [
可是运行时提示no such plot: "Totals"8 X$ x& t3 j) v
error while observer running SET-CURRENT-PLOT
4 W+ ~) w% T" o2 B# T- M% s called by procedure DO-PLOTS. U8 e+ Y) H# _; v! e$ S
called by procedure SETUP' F. U# Q$ I9 W/ ]% k# @
called by 按钮 'setup'
8 C$ S8 Q+ e' e% m6 b求大神解答啊 |