我编的程序如下turtles-own [energy]( v2 B; d( g6 E* e5 E
to setup9 r8 o$ R5 H3 F8 V3 D; I
clear-all
9 s; J$ x2 e$ \$ t% Z2 e setup-patches& d8 a! W% r: S* S
create-turtles 100
0 n; q1 `. I1 l3 n& ? do-plots6 F9 u0 u1 d6 {9 i7 k3 u8 F
ask turtles [ setxy random-xcor random-ycor ]7 Z3 J9 r+ d7 q. Q, J+ _3 h. p8 E$ s
end* `, j4 @! `4 v* a. p9 ?: E
to go
) r% _1 _! C) T9 } move-turtles
/ q4 F6 X+ L4 A. g k eat-grass d8 E6 J7 h# y0 H' c( L2 \; K
reproduce
3 X W7 m! j% X# Q check-death
/ C x! r+ u8 v) t6 O7 d" x( u$ p0 a# ^ regrow-grass# t$ g; X1 b& l4 ~
do-plots1 K7 e* V2 h+ R1 ~/ N
end) s# `; m8 b" j* C0 x+ U
to move-turtles
) u* |$ U/ t" d7 S ask turtles [- z+ t" p- o4 h& r& o1 m8 U
right random 3608 @- J' J: |: d7 L+ y( x
forward 1+ m: P) O, t6 P% s4 [
set energy energy - 1
5 }' t$ E Y9 A" w* w ]1 k5 O+ w; M! S% Q c, c
end
0 O+ L& ]2 d7 Z$ Z3 ^to setup-patches
( h7 d' Y1 J! q0 z' F* B ask patches [ set pcolor green ]
7 n5 S; r# D0 kend
" g8 ?3 e" l1 G! _to setup-turtles
" ~5 E" P) f0 h, h create-turtles 100
# h8 Y2 e+ Q8 S$ |( r ask turtles [ setxy random-xcor random-ycor ]
$ X6 l5 p7 [' q! k+ send
, x4 E' B! \" `! p" Fto eat-grass2 o% G3 y" s" W. ?0 n' _, L% Z
ask turtles [- M2 G" j! T4 H
if pcolor = green [8 a4 T" Z: ~) b
set pcolor black9 ?2 y2 E6 K9 S2 {; f# V
set energy (energy + 10)
# {; X) T B$ p. M: W ]* S) J4 J; D. q0 }! o; N
ifelse show-energy? V1 E& s3 r8 q5 {5 \( l
[ set label energy ]
) y: H" h* f# B5 s: \* o [ set label "" ]
( ~9 r/ v$ ?4 \6 p, ` ]
/ [$ k* Q. ?/ f4 send
6 [4 X5 v- W3 @) |* [* hto reproduce
+ {" S, ]/ A1 Y+ g, J& C ask turtles [3 _1 {! e7 V4 e
if energy > 50 [
: I& X: \& F1 p0 J5 o) M0 m9 r set energy energy - 50
* O _/ J1 d2 x. ^; ? hatch 1 [ set energy 50 ]
+ j4 ?- k8 L7 j# F ]
/ k; l9 r* L% D F" |0 L ]! ]% g+ [9 }$ l' E/ v
end
- ~3 S7 P# e0 Y; q9 [. G, Kto check-death
1 Q0 F! `, A4 S3 f ask turtles [
2 F! v! w7 i. I {, f if energy <= 0 [ die ]
4 j# y- `2 E- I2 v9 l ]
7 }; ]" W8 E" i6 h$ N9 |& Oend1 @* u* C. p- x0 d7 x, ]0 ~
to regrow-grass" q5 U5 e5 @% R- A
ask patches [ d1 z5 s ~6 h, w! j
if random 100 < 3 [ set pcolor green ]3 B3 X7 f6 j# m4 m. _) Q( _
]0 ]" Y% K4 D& A' }2 E0 s
end
9 g X% o/ C7 x$ H: hto do-plots# f F" ^- ^. I1 g5 m$ U
set-current-plot "Totals"
1 P* k+ e' g' k; m set-current-plot-pen "turtles"
4 G, l( ]+ L; x3 B0 W- @ plot count turtles; \% z! p, j* V+ T" }
set-current-plot-pen "grass", `! l( M4 k8 _' P3 L2 X, A, X- [1 N
plot count patches with [pcolor = green]' A$ v6 H5 p. j N. O/ V
end+ c0 ?2 r4 ?5 C g. \. b
可是运行时提示no such plot: "Totals"; L& S$ D) e) n( Z* g: v& l% T, J
error while observer running SET-CURRENT-PLOT8 X+ B5 R y4 F6 t G
called by procedure DO-PLOTS
1 P0 H. ^1 M8 h( u called by procedure SETUP
% J% l4 N. h0 a4 \4 R2 o0 E called by 按钮 'setup'! M" Z0 c# | v( I
求大神解答啊 |