我编的程序如下turtles-own [energy]8 [# C4 a6 G5 K6 u" t+ ]
to setup
g8 j) `' s' p" J' J9 z' @ clear-all9 N8 r1 P5 g8 ~5 g" x. ]' X, V7 ~
setup-patches
0 E) z+ _8 [- X- {/ Y create-turtles 100
1 K$ c0 w7 k$ L6 u- N do-plots
+ L6 Y% I! C# L% p1 {- P' i: d ask turtles [ setxy random-xcor random-ycor ]2 Y0 d. E ^6 B' L" x
end2 \' W* x; t# k, k8 @, {
to go
* A" g2 [9 a. B move-turtles
4 Y3 G+ y% Y+ n* r eat-grass
0 |$ l& u6 {( ~ y3 O6 E reproduce- C ~4 D4 H/ w% r) W
check-death, r& o, g1 ~2 W' o; A, \* b+ V! _
regrow-grass
1 ~0 k" {7 W1 f$ E- p do-plots
B3 ^9 _4 Z6 l% M# O+ s. u3 qend( g! v$ q5 F; n! \6 X# T, S4 _
to move-turtles
) ]- c2 g' P! z0 a ask turtles [
8 F4 Y1 C! j/ j- Q right random 360
9 ` t7 \& n4 B* B4 _5 `/ P forward 1
) {5 }1 H% B. N* N set energy energy - 1; P$ V+ M7 h3 t/ o; _
]- O5 S, H2 g: g* r3 n2 n) [
end
, w- {! u4 K% n5 F# Oto setup-patches# \1 Q" u6 m& L. L+ F
ask patches [ set pcolor green ]
: K H0 i P4 K( Aend
+ w: |% @- _6 n' ^5 V2 }1 |" M tto setup-turtles
9 L1 C$ N8 N& w. k" V% l3 y create-turtles 100! y" }9 H$ T& e& h" ~" X
ask turtles [ setxy random-xcor random-ycor ]
U' }' B3 |$ H; M: x8 A3 \2 v: {. pend7 S3 w# Y$ h& D( b
to eat-grass: g2 e4 n7 {5 P% n/ m
ask turtles [
3 `$ r5 C# c% a$ i& J if pcolor = green [
) f# P; ^% i% S2 A2 d% t/ f set pcolor black0 ?! y7 {4 |4 y! v$ |
set energy (energy + 10)$ f7 C' u0 ~! V9 L2 I. k8 g$ s! [
]# A2 f7 U1 r2 \, ^2 w( |6 y
ifelse show-energy?3 l" M1 N0 f- s- s+ D
[ set label energy ]
A% {$ G! C% H: S/ f& G [ set label "" ]
$ S* _9 ^& ]( o$ E ]) }7 s' p0 G# W0 K
end4 u+ V3 M1 O3 d
to reproduce0 w: y4 k& v8 l* Y. @5 `" |! R/ |! s
ask turtles [ Z2 g+ V( d4 W/ {( w+ }* a
if energy > 50 [
0 z' H- G+ W, x; k5 z/ X set energy energy - 50
9 f* C" }2 d0 p7 Y( {" G hatch 1 [ set energy 50 ]
1 ~3 D) v8 X7 n6 W8 q6 `& [6 y ]
4 l1 ~1 u( [/ U ]
+ E$ y( J- m4 D1 N) v Wend% |1 c$ E) @, d5 U+ L
to check-death
7 S `5 i! v: t5 o ask turtles [* |. @3 \, E! G5 G8 o
if energy <= 0 [ die ]" @5 |8 n; T! l$ l
]& G" D* M4 y; Y8 d0 u, s
end
) }" Q% J- d8 \. G0 |/ Z/ Hto regrow-grass- K0 t3 e9 ~( o/ v& r
ask patches [
! [: }; _1 c6 Q) w/ b& j9 | if random 100 < 3 [ set pcolor green ]( e4 E1 `8 Q2 D8 m
]$ N) I T8 `- [
end1 [3 M- f, _- l4 |4 o
to do-plots
! }. p! [5 k3 \+ ?, ] set-current-plot "Totals"
; |3 z# r4 g3 ?: F set-current-plot-pen "turtles" K% j: w( ]" k' Y. S
plot count turtles( m0 m1 v# P/ j$ B
set-current-plot-pen "grass"5 t4 J% L- f1 @9 A7 o; A
plot count patches with [pcolor = green]2 o% ^, h% S4 A3 R( e% M
end
# N* w, L- Y( [( T7 v可是运行时提示no such plot: "Totals"
- ~, y1 ~% Q9 B9 n/ H) yerror while observer running SET-CURRENT-PLOT
! [% d6 A) I! z6 X called by procedure DO-PLOTS# M5 _9 Y4 B$ l. c8 @* J. m5 n# ?7 k
called by procedure SETUP
/ F( t" A& ]$ K. K1 x6 m( | called by 按钮 'setup'
3 j. O; o) g" H% S求大神解答啊 |