我编的程序如下turtles-own [energy]: H. k& h0 P; [
to setup! a5 ^: Q( L8 _3 |% e
clear-all
C4 {, r- g- t% O0 ~ setup-patches
/ m+ H7 a) r/ t/ V create-turtles 100
8 w: X) A* E8 m5 N# i do-plots
. z9 Z$ [8 n4 n ask turtles [ setxy random-xcor random-ycor ]# _' n) B' F* e8 m; h2 |
end
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move-turtles
' H* l' _$ \) ^% O eat-grass
: b' {# Q: X4 J O+ c reproduce
7 l0 B6 l4 b A# u0 A/ e check-death
& F" D+ S& |' K, l- J/ s regrow-grass# X0 M: S9 Q3 C3 B0 h
do-plots
3 f( j6 {" F F. r' xend
& g0 ~- H: G4 ]/ x5 t( W5 l5 w# Wto move-turtles& L t6 Z& E" g- i U% ]& E
ask turtles [
* y j( p i6 r: x5 \ right random 360
% B/ A! ^5 ^6 T; a, j forward 17 w0 Z8 B+ [ }) E+ z0 N5 _9 y. f
set energy energy - 1
4 n. d( W& ^" w6 B7 l* i ]
9 f, E* H( ^) d! a+ A9 _end
& j* E, j) ^ ~- m2 `5 ]to setup-patches0 m. Q- c4 r, @/ {) K
ask patches [ set pcolor green ]
" b* P$ Y: |: y; bend9 p& k) }% a' Z1 P6 L" g2 `& a/ i4 q
to setup-turtles
* k# n; G7 E: N create-turtles 100 @' B9 [$ t! C! G4 D: U. F
ask turtles [ setxy random-xcor random-ycor ]' {; z+ e1 d7 g6 X7 b
end
: c: I7 W d% nto eat-grass+ u T* P$ h6 x# v
ask turtles [# C8 E4 g v4 x3 @; U; i' Q: T
if pcolor = green [5 ^2 ^/ H- T$ t- j a+ ~/ k
set pcolor black
' ? N! O' F0 g set energy (energy + 10)
( {" G# L9 ]$ ? ]
+ L) d% Q/ J' k6 W# P. l ifelse show-energy?
' x$ g1 f6 T' @) U: H9 F& ]- x- { F [ set label energy ]; J7 F3 ~# [2 O) n9 S% a
[ set label "" ]
2 I/ m. G& r& C, O ]
6 V- n9 F: S( y( c! m- xend9 C. b( k) q; _
to reproduce1 e# B/ K, Q% i. v6 `( i
ask turtles [
0 L2 f3 P, f6 k1 L% i if energy > 50 [
/ D5 H8 j' |) }) w3 \; V) S$ K4 l set energy energy - 507 P4 Z- B+ E' t: n$ m7 E# y- t
hatch 1 [ set energy 50 ]
: ~/ x( _' I W7 @$ s W ]
" e1 G# O& S- Y* X# b ]4 v! \- E. ]5 N: k! K$ m8 B
end
. k; k; H1 E3 o# |6 N' ato check-death/ Q: e0 w) T$ E [3 C, J" y
ask turtles [) B% z8 a" E/ m" K' b" r- K
if energy <= 0 [ die ]
: h6 m: f& b: {- z ]
& k$ }# M. i1 \3 t6 xend. Z# \, O4 x8 q5 m% s& R
to regrow-grass
& h4 J& K9 N9 N ask patches [/ k# [, R# R( Q
if random 100 < 3 [ set pcolor green ]) c3 p- Z* c; H- y( l. L
]
; s1 L7 S& b* Z) y% ]" Hend
5 o1 L+ t4 y) B+ k+ [4 z9 q$ ato do-plots
2 G- m! i, {, E; P* m: r set-current-plot "Totals"7 v3 O% b+ d: }: o
set-current-plot-pen "turtles"2 V5 E/ u* x4 k
plot count turtles
$ i$ P7 P8 h' G8 A) L j" |4 x set-current-plot-pen "grass"
e9 j% U' U2 @5 r7 X( ?4 e8 n plot count patches with [pcolor = green]
4 u: Q' ?$ L: ?4 F% qend
+ A: [( k2 Y. y, d* @; u5 Q可是运行时提示no such plot: "Totals"
4 E8 l1 \0 G& B5 D$ f' u5 |error while observer running SET-CURRENT-PLOT/ m. k) m: s, I; ?3 O6 t# q5 }
called by procedure DO-PLOTS4 {) z( c: r+ s/ V
called by procedure SETUP
: p' l+ J. R8 H: w called by 按钮 'setup' F5 E1 @ J& W+ [* Y
求大神解答啊 |