我编的程序如下turtles-own [energy]
: N A. c2 g# Y* cto setup1 T5 X0 E# }: y+ u k
clear-all
8 V/ f3 o5 v, Q8 H) F+ l setup-patches- v, a F; P' U
create-turtles 100; e$ y& y! y7 N( H
do-plots
! k/ w# |$ p: P& r ask turtles [ setxy random-xcor random-ycor ]% z# q) i- g+ o4 D
end
3 c, G% Q* Z% Z4 [% u3 Bto go
/ I- n; K7 L4 H8 M1 K. ~. x move-turtles3 { D4 V7 n' ^. U: g* y, `
eat-grass
1 t% Y3 D" N$ [$ \ reproduce
" R, `& M) A4 t" l6 ]! N check-death
4 L- F+ T5 o3 O6 z regrow-grass
4 l& W1 c$ r& T& z* N* n: j, l$ c1 c do-plots
, p/ r& ]- l2 _, Vend
; u5 a/ x' |! W# c# ]to move-turtles0 p }! E. [0 X
ask turtles [
1 G9 U \5 {+ L' D4 l8 Z right random 360
3 |3 K& ~+ {/ l1 }2 u9 E forward 1" ^, N0 c7 H3 `4 t7 G# \
set energy energy - 1
7 p4 t/ b' S& q! N) f. Y$ I3 ^ v3 y6 J ]+ H" [1 b2 S l6 ~3 Z
end
* s* L, {+ Z ~to setup-patches' \1 C+ c7 i* k' ^; ]* W
ask patches [ set pcolor green ]/ V8 G9 O) Z: ^- S1 ~
end2 k8 ~3 \+ m' S1 T% M: c. W
to setup-turtles
+ O* ^7 f; P! b create-turtles 100
3 v5 S: k- M$ U7 i& ?, A ask turtles [ setxy random-xcor random-ycor ]
1 S2 V, r. c: z) @* Q t( p% oend" W y3 _5 a/ d( u5 c8 M& _
to eat-grass
( P' u6 R8 N9 C& b7 B; a ask turtles [
$ M8 h" L: J4 t' W" m1 W if pcolor = green [
0 {9 Q- t5 V1 i set pcolor black
. H6 V: T( J N; Y# k6 Q& b set energy (energy + 10)! C2 m3 N' D" g: W' V
]
9 Y7 j7 }/ e( @! E ifelse show-energy?
4 \. B% _& B) P& w [ set label energy ]
4 `; s6 _) U: d! Y& `$ O( c: f [ set label "" ]
$ l- i6 j- V+ w8 T ]
, q7 H' E( ^6 \ J b) x! y/ dend8 `, Z; V0 P9 A: u" X8 V& |/ Q
to reproduce9 C0 u# A B5 u
ask turtles [, l6 k" |) k3 n0 O, J& }
if energy > 50 [
( Y3 r6 F% ?5 S% ]$ h, ` set energy energy - 50
4 b7 e6 y/ A% i+ H hatch 1 [ set energy 50 ]* G0 S: m" _+ K) U" {7 @2 R
]
& A% i" |! ^% @6 o) ? ]
: J6 D5 j. i4 P' xend9 M7 c& h0 S3 X7 q/ y7 z
to check-death
' W8 K7 h9 \/ [. [/ t+ c8 k, a ask turtles [( z0 D0 M* D% M% r
if energy <= 0 [ die ]- w& j# `- M$ L8 Z0 h, m: h* E
]
3 e& t& N1 `4 v! |# Kend8 g8 k4 C9 z/ O/ P3 C, k# L: q
to regrow-grass, U- w8 ^) F7 ?; \
ask patches [
6 e$ Z, U7 J: ^' s9 A, I) J if random 100 < 3 [ set pcolor green ]% [5 a! Q6 ~9 w7 @
]
3 O9 o( O( S5 H* R$ t3 hend" X( ?8 E6 G6 p4 F7 t7 `( A
to do-plots2 S7 f* j: L6 }% O1 L+ v% p- l# D
set-current-plot "Totals"
Q9 N6 e! a( d9 D: Z C set-current-plot-pen "turtles"7 i; i5 r" [' z( t2 c% T4 }
plot count turtles
8 G% V9 G/ Y7 k+ a set-current-plot-pen "grass"
* s# Y% u7 D: [( W plot count patches with [pcolor = green]+ P% Z) K0 `+ a: Y1 l
end4 I8 h7 O( n5 t- Z) c$ R$ L
可是运行时提示no such plot: "Totals": S; |3 v" C3 O0 T( }2 ]7 `
error while observer running SET-CURRENT-PLOT7 t* ~$ ]0 A5 b# j
called by procedure DO-PLOTS; o! ?) M0 F0 s* ^6 f# @( Z1 l0 S# J
called by procedure SETUP3 J+ {* w3 t5 b B
called by 按钮 'setup'+ X5 A) I- S% N/ }8 D/ W/ `
求大神解答啊 |