我编的程序如下turtles-own [energy]
+ y* D' `/ s' T1 W9 U! sto setup
: U( N" Z2 G& D- i4 I clear-all; J# W2 B6 J0 [& K' a' \* t5 f w
setup-patches) {, ~9 ]! V% a1 U* Q
create-turtles 100
+ n! @$ R) d- M8 f do-plots
5 ^4 ]$ z7 N5 p2 n: s ask turtles [ setxy random-xcor random-ycor ]
, G; B2 |. `6 y6 ~* dend
5 O! t3 ^ h' J: j6 Zto go! o7 F" |% d* f+ X" q$ c/ o
move-turtles
+ U9 l) Q; [6 T5 P eat-grass
2 E9 J( ^& D2 }- j, Q9 A reproduce
5 ]. Q t( f. O: F check-death
/ B# \0 S" ^ v regrow-grass
, e, C2 \5 m# d do-plots
+ {( Z7 P/ x, G" E v! P! }end
& V: o8 C+ E2 |- l7 o. |to move-turtles
+ |# v5 d) D2 N( R6 n) } ask turtles [" ?; Z- K7 o3 d
right random 3602 v' \; ~* o$ a. a$ J
forward 1
' e& }0 B5 B2 ?2 H set energy energy - 1
' Q' T' j4 ]" ~1 f) W7 y ]) K( E3 w1 T7 L& f5 ]" E
end! G% i& k9 i2 ~6 K- _5 x* f
to setup-patches3 |3 d( G0 b- @) D3 n: n* P
ask patches [ set pcolor green ]( Z, M2 K3 S5 M: L2 T
end- M9 G/ O' b, H/ R/ o; D2 V9 s, w
to setup-turtles
: ?2 d9 Q8 L' H! }. u& z: z0 Z& F create-turtles 1002 M5 Q3 B& T9 ]" O0 x$ \ R
ask turtles [ setxy random-xcor random-ycor ], U! v" p; a$ W3 L( l# z1 i' t' a0 \
end* \1 t4 p1 k) n ~
to eat-grass& Q7 M( n5 l( g
ask turtles [
9 T$ b7 p) Y: l if pcolor = green [# j: Z7 i- N+ |: p/ h5 s! u
set pcolor black/ ?& m% D9 d. u" y" N
set energy (energy + 10)/ Y. y. P6 m, g0 W1 G
]
7 c" k1 H! }- @8 t; Y+ ~! L ifelse show-energy?
" O. t+ g! J" H/ y [ set label energy ]% ], I5 d/ Y0 U+ b2 m+ T
[ set label "" ]0 r' f: l j C' ^3 |
]' Y6 ~/ ~% p0 B# Y
end* G& k7 }# k5 ], f
to reproduce4 g* a, j# Q9 p6 E3 k8 q4 }
ask turtles [9 K' k3 C7 p% q J u
if energy > 50 [# C) Q7 m3 S" O" v. Y/ b* y
set energy energy - 50# Y% V( f) ? A# O k
hatch 1 [ set energy 50 ]
) @+ P* V8 x0 A; O) r ]' `( m% @9 f' d, z) E7 w' O9 C, q; I
]
, L- l3 `! I7 ]0 N6 kend
$ h7 r5 d* w# G6 Q8 N yto check-death; q, R: n& H0 L
ask turtles [
; a% ]: E+ r- z0 X( @. t if energy <= 0 [ die ]
8 P/ v* \' x+ C# I: a" ^& ?8 I ]; f' c' V$ ^8 M5 e) j
end
( o8 k9 g0 J6 { K4 a5 [5 Eto regrow-grass
- D! I# }1 P' s3 b# n. R+ } ask patches [
5 |: x9 N' J! S9 O- d if random 100 < 3 [ set pcolor green ]
# n4 V. S6 p5 @! P' i @" m4 D' W ]
1 A: `$ }$ z( O& `end( s9 D7 E4 {+ E1 W; z% V5 X
to do-plots
( q% F% P1 c0 q: f! P+ t8 T+ p6 D set-current-plot "Totals"
. k2 X0 G, s' N set-current-plot-pen "turtles"# F; e3 J2 r/ j8 i
plot count turtles1 r+ I; v6 H8 b) E5 D1 L2 h
set-current-plot-pen "grass"
7 b$ e, R9 m) q$ ` plot count patches with [pcolor = green]+ U* W: { S5 @
end8 ]; M2 o# a: d2 a. r% F1 n6 S
可是运行时提示no such plot: "Totals"& O1 \" P" n$ k5 F0 `. w5 |
error while observer running SET-CURRENT-PLOT/ v- J1 T' R0 p0 G8 l5 O/ D
called by procedure DO-PLOTS
I, E) }! [) I$ q1 G called by procedure SETUP3 z. r4 `9 ?! O2 k2 v3 ]2 ?4 z9 x
called by 按钮 'setup'
b+ P# C, ~. a: F, S求大神解答啊 |