我编的程序如下turtles-own [energy]0 o% A) K9 J: u6 L- ^
to setup
; }5 W5 t, h' ^8 I clear-all. ]( o. K% ?7 |
setup-patches
+ R C5 v& _$ p7 S create-turtles 100
# \/ I2 o5 P' \4 w3 f/ `9 K2 j0 @ do-plots
6 u" q. J: i. L2 y% G& o ask turtles [ setxy random-xcor random-ycor ]; O/ t }, `: P0 D* W
end
- {( `. b- e9 L# ?to go, K$ y9 @* G: h% k9 k9 a
move-turtles
5 ?# v% k9 o; {% U2 {/ y eat-grass
g: e- T/ z' ~$ P reproduce
. @' A8 Y G; A1 N check-death
) _0 h8 X7 D* O1 B( I T4 t9 ?9 W I3 f regrow-grass
2 L. H/ H# A9 S, w0 ? K& D do-plots
, e5 a; m. L5 c4 a lend
- d6 D1 }2 B# N4 {2 x4 k) u& oto move-turtles
( r' x6 i/ A! u) Y4 o1 A4 u. @1 V ask turtles [
/ Q5 n9 N. }) E; a9 |' t; S right random 360
8 |, d, d& A; j$ c8 L9 D forward 1; v" x1 i9 N: R9 L6 b
set energy energy - 1# ]! R7 R3 a4 _/ F
]. Z+ y9 n }$ x( V0 L4 ~. y
end
4 R% \6 ?3 s; b, ]; N9 y: wto setup-patches: i: f8 z; n Z7 [# o
ask patches [ set pcolor green ]
_% c5 E$ M# C: @# R0 c, Cend
8 M1 }8 |4 ~% R2 Ito setup-turtles
5 f0 `1 `; _3 q6 O V( I create-turtles 100+ C% L! m! y" V' f( Z: a7 }
ask turtles [ setxy random-xcor random-ycor ]& p O8 O$ D0 r! v4 b& [. y# }4 @ q
end: q9 c0 _/ L+ e
to eat-grass- N7 U9 C6 k& n- @7 j' n; v
ask turtles [
' s2 C7 s* I3 N# s/ }. j if pcolor = green [
# K, L4 M- g: g* c+ f5 p; w: G/ U set pcolor black
! B4 w6 z6 L' R, G& G. b set energy (energy + 10)
' y9 X# {. n: ?0 d8 j7 z6 t ]
0 t1 T" J7 C2 D1 A0 H4 t! a ifelse show-energy?
0 n8 L2 d; _( _9 r4 l [0 m1 G [ set label energy ]7 e5 V' j3 o$ C, k+ H
[ set label "" ]
$ y. ^$ }7 K9 E+ F- |' I( n ]
( r' q$ J% l) j( _: c+ Cend5 V4 |* H0 B2 O2 w, C, a+ t
to reproduce
$ \. Q2 Z6 I r" i ask turtles [
/ }/ O; u: n' t7 a$ ?5 Q) T: ^ if energy > 50 [
/ b* j& |8 t; X) K; h set energy energy - 508 Z4 F1 I1 V9 ]: I0 `
hatch 1 [ set energy 50 ]
( s2 u/ `1 N* d. r# v& H! B0 N ] @0 ~( t: ]$ v4 J: p
]
8 i% B& s0 b& g9 n+ m- ^: T* eend
7 K, c2 `4 S( s0 C- e+ Q+ o* }to check-death# h/ \( D% Q% L- E* W' Z, N4 P
ask turtles [
- J% a$ o# N5 S6 Y if energy <= 0 [ die ]0 X. R1 i, k8 R8 k5 Y, b
]& d5 M2 \3 r, K0 {0 J" a
end: {8 G e! i2 ~ R
to regrow-grass1 q* I0 N$ Q4 g( b5 {* i& [" ]) S
ask patches [4 h r) v1 Z7 T5 \; }3 ?' p
if random 100 < 3 [ set pcolor green ]. V! \7 X: F7 D6 y& b
]% A# n& L3 o) T! w( u7 d0 l
end
|5 c" x3 `9 R! c8 ~9 [to do-plots
# [# q {. O9 O2 Y% T set-current-plot "Totals"! z( A H, h/ w' t- p1 t2 _
set-current-plot-pen "turtles"
8 L( t3 a1 }5 F/ h( H& N; w2 z plot count turtles& c2 l) T6 n. X1 [1 \+ ~
set-current-plot-pen "grass"! k- v$ y2 v- e+ b9 f$ f/ c
plot count patches with [pcolor = green]
* P0 B/ Q1 t% s, V( e7 Zend6 M7 C+ A L" S7 T& W9 q4 z+ }
可是运行时提示no such plot: "Totals"
+ u, }3 `3 m' n8 j' ]% Y2 U. lerror while observer running SET-CURRENT-PLOT* A _) \' D# T6 i) R
called by procedure DO-PLOTS' J7 V, A; i u7 F( E# W
called by procedure SETUP# u3 z7 |2 ^8 z5 ~8 l, u. A8 g
called by 按钮 'setup'/ f7 X- W/ w, E' ^
求大神解答啊 |