我编的程序如下turtles-own [energy]
! _" {/ K8 c4 I& O& T( J/ h Mto setup! ?, Q& G8 _. m6 M+ y
clear-all
, p- L0 p- ?/ \! W# g+ }5 F setup-patches ]5 B% W- x" i
create-turtles 100# W9 _* q8 m3 ^# M2 Q
do-plots
! }, i; y. a, O: I% Y ask turtles [ setxy random-xcor random-ycor ]7 ~& Z- U" u: a7 p+ w
end* R: j, Y! U- r
to go) K* n+ C+ R" Y2 ]! h
move-turtles- H1 A3 l6 }8 s5 q
eat-grass
* g3 y; Q7 `: w- @9 A1 x- f reproduce
$ j% y' T# V! S$ R! w check-death- s. V" k$ }# L e* e
regrow-grass4 K+ s+ |6 L7 l* x' r
do-plots
* L& |, e; t9 tend, ?9 [ Y- h, o5 }9 |7 e: z
to move-turtles! P( z( ]. r. O5 C3 P, z. X
ask turtles [
2 c7 [4 S' Z/ P5 x \ right random 360
1 x5 z. ]: \& s5 ^5 _; w forward 17 g) ?. b; ^+ T' ] ]2 ^* D3 V
set energy energy - 10 w: _0 R; \8 I3 }; X! @5 x1 N4 f% |
]! x, N! n6 ?6 e" g. a' v- I) K
end8 O" ]$ T) p8 b5 I& v% B
to setup-patches- P. _- i3 J0 i0 C; D/ [
ask patches [ set pcolor green ]
7 d2 Z: ]4 v. d* r, [ Q/ o [, [end
5 A/ Y7 q' Q7 W6 t/ qto setup-turtles
+ B& o6 v7 n. P9 }. g. P& q create-turtles 100
4 x* v+ f! F x4 r ask turtles [ setxy random-xcor random-ycor ]; ]. U+ \# B* a- [$ G% O5 R- @. w
end
0 D. h: E( Z* t) Y, W7 kto eat-grass! i) ^9 B0 E" n2 E: p$ _: G
ask turtles [
/ c* g" O$ ~- Z if pcolor = green [
0 D4 D! o$ L2 j+ v5 h; i) ?5 k set pcolor black# O' ~- v: O1 Y8 F. M) A
set energy (energy + 10)+ T1 p! z5 Q* h
]
5 r" Q. ^& B6 N$ r* q8 Z7 _0 { ifelse show-energy? J, R" ?. m( @
[ set label energy ]5 L, [; n6 I/ J) c# ]. }1 [; W
[ set label "" ]
t& P. U: s& `2 h5 m9 o" B ]# A4 }0 w, A0 p% x" ^- G
end
+ s: E- b, S& m7 i- j/ E0 p: nto reproduce
& z" l0 c0 x, H$ W" } ask turtles [5 f/ ?4 m9 o/ F# M O8 ?# \; _
if energy > 50 [
; V; i g1 K1 m% r T G1 [+ S set energy energy - 50" y4 E' k; m5 E/ v
hatch 1 [ set energy 50 ]
9 |% X+ G% w7 c C* D/ f$ p5 `. h ]
@0 r' \9 ?: J5 N/ M6 g. H, f ]( j6 I- j4 ^% o
end! @3 ?1 K/ U5 q% H% Q$ i
to check-death0 d) O+ `# Y% U8 X& P7 E
ask turtles [4 V: \0 @: m; D' I/ E
if energy <= 0 [ die ]
, c( |0 N: w" Q" d' \ ]
; i/ |. ?+ ?* Nend
2 U- j, d- h l+ Pto regrow-grass1 H' q- ^! e* k* a8 F6 s
ask patches [
& l, b1 G: H/ B: U if random 100 < 3 [ set pcolor green ]
9 x5 Z) c$ @2 }# K8 i. H ]2 g$ n# G7 @8 J4 \; b
end$ l0 A0 J" y; S. i" `) c* h
to do-plots' N% v( q1 q+ S# O; y
set-current-plot "Totals"4 ~9 k3 D+ T! ^- i+ \
set-current-plot-pen "turtles"
2 g1 v- P5 I9 p, w plot count turtles: n* ^! ]% V8 j& O5 B$ d
set-current-plot-pen "grass"
- ^/ V2 A# c% a1 C6 I, l plot count patches with [pcolor = green]8 m6 ~2 h5 Z8 k+ U
end
' ]9 K& q0 |! q7 A可是运行时提示no such plot: "Totals"
5 J& O( _- I( j. |. e! ferror while observer running SET-CURRENT-PLOT
2 c# ?- e, B. O7 T" d. U8 ^7 N called by procedure DO-PLOTS% x+ B6 ^, I) O: P5 _6 T
called by procedure SETUP
8 {# L9 s) l+ d called by 按钮 'setup'
. ?7 U; W: y& T' p1 m9 t, Z/ d求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
