我编的程序如下turtles-own [energy]" `% ]' Z& Q% E
to setup
! c& O* A/ m0 `1 x3 j! Q' v clear-all1 d- G0 B/ T' u/ @
setup-patches. @+ c# ]. B4 H' N
create-turtles 100
6 |1 R+ ^- H& q$ k do-plots& v# k) j* e- J, J2 V
ask turtles [ setxy random-xcor random-ycor ]
* [/ f' D7 H0 s/ c- \# g% I: Fend. Q8 E1 b6 ]) n5 n( C+ V* z# A
to go4 z: }/ O2 }: ^" ^- o0 f
move-turtles
; I% }: c! S3 S# n: N) ~( b+ F) _* r eat-grass( i) o v R$ l. v
reproduce
& _6 @# N: F1 s. A check-death
; x- t+ U8 L- `/ r5 I9 n* E regrow-grass e: p: s+ G, d* V3 {1 M
do-plots
$ K8 i% _# [0 C% Fend
& Z+ K* q* [+ W0 wto move-turtles
7 y) i+ ~* I3 s8 A# s8 M( P ask turtles [6 W9 H6 Y) F% {! b! b
right random 360* @# \# Y3 B, G* e" C0 V
forward 1# K! _8 ]& ]5 O/ o
set energy energy - 1
: S7 q& q3 _( [ ]
+ e, j3 T3 x8 k% p8 q8 Aend! q$ ^4 M) `% m; g5 e2 n
to setup-patches
+ B) J8 n+ e4 p+ t; c- g ask patches [ set pcolor green ]) A# U) m" v: E/ t% ~/ `! G* Q: K
end
, m T# d5 {, Z5 q* D: Ito setup-turtles
, T" h7 h" c6 H0 D; y& t create-turtles 100
$ [1 W5 \! }8 K" V3 `6 P' O1 G ask turtles [ setxy random-xcor random-ycor ]
0 C1 l1 Y6 J h/ N8 [4 zend
& L- ~; r( j- I5 `to eat-grass4 R2 t I: [" W: F5 i8 l: A! i, }/ X; U
ask turtles [/ k9 r1 _# p2 |0 {! V
if pcolor = green [
; P% {4 U" n8 ~2 B2 }& Y- Q2 t set pcolor black
. {0 m7 Z2 z& p( z6 j set energy (energy + 10)$ w: g/ {5 a9 [' Z2 V. H6 R
]
. R* K7 G* \% n) m ifelse show-energy?3 O5 v8 r' T5 S9 i$ L
[ set label energy ]
9 ~% G* q( b1 u! Y! { [ set label "" ]
6 x, i+ S% d! Y ]
4 r) E/ u' V f: P/ \ ]" Dend
k; h; H& k. A) Y" J: \; `to reproduce5 J" I6 G5 }; }. ]1 E b# m
ask turtles [
) H q3 M* j9 c3 o; e7 u1 k' l if energy > 50 [; @* [2 l) s, z: |1 g: c
set energy energy - 50. o L% ] a; t/ @1 O, F
hatch 1 [ set energy 50 ]
) z; `* b0 w6 k% J: V( \ ]
& y' G& U4 W- @$ L- q* b ]3 `# ?3 G( R& }* I" D9 w3 Q4 Z
end1 {( d8 d) Y: s$ Y
to check-death$ F2 H7 y7 I7 w
ask turtles [, E" |& F7 O) [" r0 V
if energy <= 0 [ die ]' X7 N, u1 r) e+ I
]
. E- K1 ^# e& J4 r* i& ~6 x) fend
# m2 ?' L8 `' S, N1 v0 n8 xto regrow-grass
# r3 T9 D: F' D7 Z ask patches [" Z6 B1 ]) M1 [8 y; j
if random 100 < 3 [ set pcolor green ]( \0 k$ U, ^1 \
]; z/ t2 m# Z) Q, C8 p
end: S1 r. W. e* m/ A2 h
to do-plots: \) u& o7 u9 i) P0 Q$ B
set-current-plot "Totals"
, j- Z3 P. T2 M9 p set-current-plot-pen "turtles"" b" e7 Z) U' l. ]! G" r' j/ Q
plot count turtles
; ^4 v2 ]* \3 [* j$ `/ f U set-current-plot-pen "grass"2 `/ I/ f( R* k
plot count patches with [pcolor = green]
) p$ Q. m3 f+ `end
. W9 n. n! I: y ~7 a可是运行时提示no such plot: "Totals"
" d0 h' C* Y* `# Merror while observer running SET-CURRENT-PLOT0 Q/ }. ^5 n; z" L$ e& @$ n. m
called by procedure DO-PLOTS! [( C9 ~. E! b! ]* c. Z! k+ N
called by procedure SETUP2 ^" n3 H% [) Z# B& ~0 t1 G" S6 t
called by 按钮 'setup'( X' w6 r7 Q" S- |3 a+ q
求大神解答啊 |