我编的程序如下turtles-own [energy]
$ b8 ~- F Q+ P+ R1 }( k P9 Kto setup$ K, P! n. W( d. d# A! `* f* _
clear-all9 a2 `# E# i z% u
setup-patches% j* O8 D) x; z5 k
create-turtles 100
: y0 L. {/ Q$ _* p N3 ?% x5 o% V do-plots
1 ?. O8 Y8 Y# j6 p1 H' H ask turtles [ setxy random-xcor random-ycor ]
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to go
) ~$ Y: x$ u, @! x' k8 g move-turtles
0 a4 x& x' t! `" w eat-grass
& j) v+ `( m, J/ K* ]2 N0 R! Y reproduce
! T1 L7 F6 d/ R- [4 m$ ^ check-death& Y# ~. s- X9 W t3 p* x% {
regrow-grass
" e8 \5 E" {% F* z* A0 c$ s8 L do-plots
3 J1 r% c- N- V. Q0 [end4 M+ E C# p' b4 C0 k( i+ B- g% @
to move-turtles$ \ [: h- t% n% Q+ B: v$ i
ask turtles [8 m0 c% n3 E1 y" k1 t
right random 360. e5 F$ P2 o4 ?$ `
forward 1
+ |. p" s+ d2 _% c6 I: F set energy energy - 1/ s# U3 \8 K9 e- \1 i, g5 G
]
' w2 M. V' q: p% ~- |) {# f$ a% Rend b' J$ o1 M; D
to setup-patches T- b, V. @9 x
ask patches [ set pcolor green ]5 V# u1 \. A8 y/ L$ Q" O
end1 S; E w7 ~' f; |2 O
to setup-turtles
9 v3 a* h; d& n% X* l$ T6 H' d create-turtles 100
Z, L# G& @/ a* ?' ] ask turtles [ setxy random-xcor random-ycor ]
* B! v! ^- y9 ]% r8 T& a: S" p( D$ dend/ Y8 k" c5 [' a' J2 J, R# s1 |+ j
to eat-grass
; K' J. B" _4 z! V1 Z2 A ask turtles [- R" B" d h5 g9 v7 }7 F* x" r
if pcolor = green [
; S, f% F8 [$ z set pcolor black
& k0 z# q. \2 K* F7 r4 J0 Q set energy (energy + 10)
/ w6 q; K, ] }2 t7 n ]
z! V& }# G2 d$ y ifelse show-energy?
1 |5 ]1 k! ?' h; n$ w% C [ set label energy ]
6 j5 s! a* Z, a; E3 v [ set label "" ]
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end( N- N0 ~% j7 T$ j) p
to reproduce
5 K7 a7 ?4 Z' G ask turtles [
$ A C1 s% C1 m: _ if energy > 50 [$ x- n) `5 P- k% [
set energy energy - 50/ H# |$ a2 `: x0 |
hatch 1 [ set energy 50 ]4 l2 y" O% e0 Q" t6 |
]/ o* Q8 Y# O8 @+ ~6 c' {
]$ z& N; _2 h7 n2 P5 h' D8 ]4 {
end( H$ j% Y- R) I3 q6 N! T) [/ C( f
to check-death' A% M& ]- e8 p( e6 {
ask turtles [! h# @" P7 v& q1 T6 e: n. S3 q
if energy <= 0 [ die ]: ]# T$ A, w1 @3 t' T1 {/ o
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end
5 g0 z0 r' }& p& Wto regrow-grass
' \5 v9 U4 F* }, l. ]5 T: m! y& P2 w ask patches [
1 A# q! y* M1 U$ O# O+ g% E" m if random 100 < 3 [ set pcolor green ]
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end
; \* L- a: {3 d% q# _to do-plots
8 x7 E F# n$ h! L/ z8 B set-current-plot "Totals". \0 h; e% x. H0 }8 n1 V8 ?
set-current-plot-pen "turtles"
1 L; T6 N* D- T/ n, V% J plot count turtles% }4 p: L' I1 x2 j% ~
set-current-plot-pen "grass"
$ L6 b) z: H4 Q& o' m: A T plot count patches with [pcolor = green]
( O& p7 ~3 B T7 B5 x* Iend
- j- a( y, H. V可是运行时提示no such plot: "Totals"
9 B. S& ^$ Z w; H& w% E, u- serror while observer running SET-CURRENT-PLOT; X- _6 m3 T u/ o
called by procedure DO-PLOTS
2 ?- d* a- L( m; c called by procedure SETUP
7 U3 N4 Z1 F% _& L) l9 G1 ^ called by 按钮 'setup'
) ?& H; n: I$ u; z1 ]0 M求大神解答啊 |