我编的程序如下turtles-own [energy]7 C, S0 Q4 p% p1 I* W
to setup
* i4 I4 ]/ U* A. S& q+ U" E$ ` clear-all$ a3 x3 z4 N0 s H; |
setup-patches h7 J& \' e+ X% D
create-turtles 100
$ A. W' J. _. q do-plots
; e0 }/ |7 j' _2 ~$ B% U, A ask turtles [ setxy random-xcor random-ycor ]& n8 Y6 S3 g' b1 Y8 c6 M
end' q4 q. D! l. e$ C4 k9 l" [/ K( b
to go( |: [: C4 m8 ^3 y" B
move-turtles# Z% C% k/ R. z% u( _8 T
eat-grass
: H' Z/ H; l6 e( W- u, e+ s' V% \ reproduce. Y- ~+ T. x: \2 ]7 [; x/ O4 v
check-death3 N( P' ^* Q7 u' d/ W
regrow-grass
) `* Y2 @' X# D* j G3 i do-plots
( j/ k4 W+ E! O! send7 X0 n3 ^3 U# O9 p. r/ P Z, y
to move-turtles' D3 z2 J0 o) P1 h7 T9 y" b& n. u
ask turtles [
0 W! M5 B1 \$ i" {. s: d8 P$ a right random 360. Q7 x5 \# s7 ], v
forward 1' D9 I- Z0 K1 H) \% J* x
set energy energy - 12 Q3 z5 D- l/ c- z7 c
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end1 s) }4 {5 t( v- d, a5 ?7 }
to setup-patches
" t6 U8 c% u* c3 s! q" U- n& D2 f ask patches [ set pcolor green ]
: V+ A9 A1 S+ U: U4 Nend
/ \ m! d- ~- W- dto setup-turtles0 V' a: w3 p( l; ^
create-turtles 100) N! h- w0 e7 a y, D
ask turtles [ setxy random-xcor random-ycor ]
7 d4 D9 ]& D" @& A4 mend
; B: c: L6 O! y. F7 ito eat-grass
/ X3 ~1 Y$ }$ R/ \$ Y' P ask turtles [" B2 ~' l1 X6 ~9 a" r# A* N2 _
if pcolor = green [
) j8 S8 [+ c! z& n8 \ set pcolor black
8 `9 \# n5 D( K% Y+ \+ n: m* @* i8 v set energy (energy + 10)
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ifelse show-energy?0 r* U0 L d" k" _6 V) X4 L3 M
[ set label energy ]
* b4 c; w+ o& | [ set label "" ]
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/ b, d! X4 C! e- H2 L6 cend
8 d1 ]6 H% c- n) T$ f ^. pto reproduce
3 N( ?$ ~- e+ b2 z ask turtles [
* G; H' R- b2 O! _% u if energy > 50 [- v3 p9 F. o- S: c
set energy energy - 50% T% `9 l5 @: o4 R& y9 g( P& {
hatch 1 [ set energy 50 ]/ H. e8 E' d2 ?; u1 s0 m$ _( v
]
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. |. k" C" Y" U( u! F# p5 uend( i" S& s6 o5 D1 z: C2 L. L
to check-death
( z7 G2 P' c* ~! g ask turtles [; J# g9 c2 h/ A0 F% C7 n* i. G
if energy <= 0 [ die ]/ K7 w5 l; T8 i1 A# k, J: W! P
]+ ]) L# V4 |5 q: G- i J6 i& ?
end1 O, A& `$ P+ T+ V, G$ v F2 M* R5 ^
to regrow-grass9 |* F2 t* O+ m& D. M# N
ask patches [
" R- P. ]2 V/ C- H% k( e* I if random 100 < 3 [ set pcolor green ]7 _8 H2 L- w5 _1 L
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end
. q* @8 S" d" o' l5 Oto do-plots
& N3 T4 o, a, g8 T. q set-current-plot "Totals"
1 A- ]* ~1 d5 `1 B- T$ m, v set-current-plot-pen "turtles"4 [" d) D$ ^4 |' u
plot count turtles
. l, p& x0 ]" J set-current-plot-pen "grass"' L, z) P- b* B. b
plot count patches with [pcolor = green]
, V; e' B: h3 T$ f& Fend. D' s) `( C( ]& O% |4 V* H! _
可是运行时提示no such plot: "Totals"
' i1 j4 K; J {, O. eerror while observer running SET-CURRENT-PLOT
# H/ p/ D, Z2 q called by procedure DO-PLOTS1 Y& y6 n: t) D# @
called by procedure SETUP
' q$ ] e9 n" }0 D+ g- }9 Z. t# Y, ` called by 按钮 'setup'
7 G* L/ O- T A- P求大神解答啊 |