我编的程序如下turtles-own [energy]/ }0 Q/ |5 k; \8 A
to setup
3 E# a5 m2 o0 }$ T$ T clear-all
6 z5 r, a! Q4 u' I setup-patches
8 ?' p' |$ L$ d$ z) L# |: x create-turtles 100
4 R& n9 a- `. E5 H' Z7 M! y do-plots9 u5 A0 n1 X6 c
ask turtles [ setxy random-xcor random-ycor ]
# j% u4 d h5 t+ y: @) Cend
3 N% Y Z3 @" B$ X* h2 Yto go; ?$ W) K7 }! [ E
move-turtles
- Q! G: e0 e$ \, F, o# w eat-grass
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check-death
: A6 V3 S; k3 v0 z3 ]% g, n8 N9 z regrow-grass6 X3 z! Y% g4 L6 V2 T: h) L) }
do-plots& g h9 [5 m5 o( C$ K+ B R
end
- E) F* P3 `3 K( x U h$ Lto move-turtles$ n7 }% V8 K& u9 B9 m+ O- G0 S4 g7 I
ask turtles [
4 }& `- D3 p. U2 o/ u; c1 s5 O5 X right random 360$ a F0 }+ U) ]9 q8 A) f/ n! O
forward 1
0 _1 E0 T% X& d i set energy energy - 1% x5 _' V" H+ p4 q
]
# c/ P) `# `# a8 Rend) ?7 h" K* Z! N$ t! A! I# ~
to setup-patches; ~/ Y: B" \4 r1 U" z: `
ask patches [ set pcolor green ]
3 W2 j4 A3 Y8 Q: t X/ Jend# S! q$ {% |" Z! ~# v4 @
to setup-turtles
4 z; U7 L& |2 q2 @; S+ H create-turtles 100
$ X3 y4 _; e! `+ M, j ask turtles [ setxy random-xcor random-ycor ]
/ J9 W$ r# w6 o; i: [& ?$ Q( Eend
# E2 Q% j' I3 M4 k ~: Vto eat-grass
( ?. x) U9 ^ q: n2 F7 h$ ], U, d ask turtles [
" |4 L! [0 C4 k8 A% ]" P if pcolor = green [! _5 W( s( ]8 y6 q
set pcolor black6 K6 R% m( w; J1 P8 ?( P
set energy (energy + 10)5 @ R0 \) Q0 Q0 [+ x
]2 Z: S: U9 e% P, K/ \4 y
ifelse show-energy? D/ ~- X h. q& ~' B/ y& R
[ set label energy ]0 A, j0 H. l, W* B( |
[ set label "" ]/ H& O! ~* Q" f
]
$ j6 x: H+ U" ?. |0 @end5 \. C' g- O3 s/ R+ N
to reproduce
8 D. @; f* H0 g* U: i ask turtles [3 X, c9 D8 Z5 u0 L& I0 }3 Q
if energy > 50 [% F. l, V# d$ M5 c) {) N% |
set energy energy - 50
, X4 D5 L. P3 Z2 s) V9 o8 D4 f( F4 a hatch 1 [ set energy 50 ]% o b# }) O" l
]
4 ?0 }1 C) b2 E9 Q ]/ g/ d, a; Q4 Z( }; }
end
4 i5 P9 e8 c$ D" G4 a& k% e9 ~to check-death
$ B' ?. j# t0 x$ @, z* c ask turtles [' @8 f* \& l+ W: a4 t3 Y
if energy <= 0 [ die ]# L% X6 ~) _9 d1 t8 z i1 j/ ]
]7 o4 ?4 E) w. \3 s+ g' p7 H
end$ t6 O3 ?$ V: ~! \4 A
to regrow-grass% p* j/ V$ M1 B' e' V3 E3 V) k$ l
ask patches [
; X; F7 M& q$ v3 ?+ W4 c9 r if random 100 < 3 [ set pcolor green ]/ q: |) ]( j2 {3 `5 N/ q4 G
]
' |0 P1 X! c1 H4 ?# U$ rend
9 A4 x; x% E0 r3 Ato do-plots7 Q' b: ~8 t c6 Q* c( ?
set-current-plot "Totals"
# C0 q3 r4 a* | set-current-plot-pen "turtles"
, ?+ f, p+ P# l( m; p) y/ H plot count turtles
! l$ ?' C, o6 t) x set-current-plot-pen "grass", m0 j' h% B$ R/ q/ z+ T! L
plot count patches with [pcolor = green]
9 j+ H: E% K) l4 _8 p6 lend0 Y- t V) ]/ j1 y2 J2 v
可是运行时提示no such plot: "Totals"# i1 u- S% q: [, v6 m7 E0 w
error while observer running SET-CURRENT-PLOT" R+ N! {8 T' K+ Y( I9 n6 i0 _
called by procedure DO-PLOTS" s7 \; n7 {& k6 q9 W9 W( u1 u
called by procedure SETUP# Y) D6 K9 {7 G$ N) Y: Z' Q
called by 按钮 'setup'# P( j8 a6 {: Q2 R# \
求大神解答啊 |