我编的程序如下turtles-own [energy]1 [5 T- {5 ? N* t0 ^9 N1 C. }0 v
to setup, j0 ~! v% H& ~+ ^- n, V7 ^1 u
clear-all
+ b2 N1 s. I3 a1 x8 E1 _1 z2 A setup-patches* S0 W3 \9 r% G- a/ c
create-turtles 100
) G$ M5 _9 A3 I9 k9 A do-plots% \6 b2 x6 `0 l+ N( F0 F
ask turtles [ setxy random-xcor random-ycor ]" Y* p3 J4 }" q1 d$ n
end
/ f3 j3 @( u. G: ~- H6 W. ]/ Qto go1 B1 Y3 I/ Q" j* ?
move-turtles, {* o! r5 N& f! e& g
eat-grass
3 h% a- z1 J; f0 m reproduce
" }7 S) u$ G& e( u. E1 P check-death& v6 c4 G0 [# j0 }% F T
regrow-grass
7 e! o, y% o+ n do-plots
. @% p+ H1 o9 eend; o! C' [* O4 V: F) R U1 g
to move-turtles
3 d' Q2 u' ^9 E6 B ask turtles [' O* f( P: O: C1 r3 N9 i
right random 360
! Y, E H( O4 H+ i" d forward 1" b. B; Y$ t1 ~
set energy energy - 1! v e7 b; z3 ~' \2 T
]
* I& ?% q4 o w* Aend
/ R& }" L$ d7 ~4 D+ O* H8 `to setup-patches
6 L1 r7 _, X* b6 |) e ask patches [ set pcolor green ]
' q' k+ M5 M4 oend
, _5 \4 C. |; Z" M6 @* m. @to setup-turtles
. ? _, g0 u" `/ k; ~0 o0 | create-turtles 100
! d1 I! m" e) M( [0 z7 h ask turtles [ setxy random-xcor random-ycor ]
$ J5 m2 |6 {1 H5 F9 xend& C$ d0 ~7 h3 h9 Z* a1 d
to eat-grass
c) s6 r0 G" `1 e* M+ G ask turtles [ c* p& M5 w* F7 l& B
if pcolor = green [
! c6 ]% w6 m( a set pcolor black
/ P q3 C: z+ A# Y$ M$ y set energy (energy + 10)
7 i4 z9 ^8 D( d" F/ J5 |$ P+ |- c ]
" b4 s) m2 B8 o/ X$ x ifelse show-energy?2 h, I$ N5 I9 C4 f5 G1 u
[ set label energy ]
( x% E/ j" ?* n# c" O$ U) `4 n [ set label "" ]
7 K8 h! m9 |: L# y+ ? ]3 ^5 q: |% A- G [; b2 \* {
end
! T0 Z: _9 c4 y2 lto reproduce% u! C0 j1 s, J1 \, B% J
ask turtles [
' l' G c& Z" J) F1 s5 e$ H if energy > 50 [
. |. }9 C, H' k0 \( L8 D set energy energy - 508 i9 c% W( s5 S- N4 s- O& K, y/ E6 X& g
hatch 1 [ set energy 50 ]
' t0 y/ ~- @! j/ q! z) V0 Z ]) h" x8 c, m/ E9 I4 ^
]( h" B7 T/ {: p
end+ x' t3 y h$ o3 r f& Q/ @; |
to check-death
* j" e8 y! G% Y3 ]: C ask turtles [
3 R" f: Y* Q: c) G3 [/ a; z if energy <= 0 [ die ]
) n8 h- c: P* `+ H3 y2 h6 T ]
, ]' P9 Z6 r5 qend% d! F7 Y) Z% e9 a
to regrow-grass
3 C7 R2 r* |1 l& z, v5 Z8 v$ ~ ask patches [8 J: |' Y9 {8 ^
if random 100 < 3 [ set pcolor green ]5 ~8 _+ E# V! v& U% [4 \5 H! _
]
+ `+ j$ n5 R* {& [1 @end2 Q! H1 D. \- A2 q
to do-plots% d' X5 b! @' R$ q
set-current-plot "Totals" { X9 r! m6 z7 f
set-current-plot-pen "turtles"
' a0 {. B! Y: e0 w5 P' k plot count turtles9 E* [# H1 k4 |# F5 g( B
set-current-plot-pen "grass"
) ?+ F$ w- _3 w" X plot count patches with [pcolor = green]
; `0 L( n: K# T$ U( Lend }1 l8 j% d7 X. Z4 u" {
可是运行时提示no such plot: "Totals"
6 m; p* }; S8 S# @ A: Serror while observer running SET-CURRENT-PLOT
# s6 d& y. }% b6 c called by procedure DO-PLOTS
6 w7 i9 X' d* i, W5 e called by procedure SETUP9 L; O6 ~+ y& {, ^+ z2 L" _# R
called by 按钮 'setup'
% i9 ]5 i1 h3 v求大神解答啊 |