我编的程序如下turtles-own [energy]
5 q7 }: L( A1 r4 wto setup
2 B' N& R" b0 J clear-all1 A4 v. r! g: {7 J
setup-patches
, b1 n+ K2 E5 u1 E" J create-turtles 100# f* y) w% j' r, v' a: @7 }, }
do-plots
. x1 o9 v" B: y ask turtles [ setxy random-xcor random-ycor ]. h7 V+ Q3 u( b
end
! u, q9 i/ W# o4 m% |, j v9 s9 fto go0 @; \3 N* d6 I9 F- v8 e7 L
move-turtles1 Z( Q0 {0 z2 x" v, s) m2 U u
eat-grass
2 a8 Z9 Z* b" R! i9 Q8 i0 J reproduce/ q3 |& w% E. T" c! x+ |/ c' h8 c0 {
check-death
1 ?( A7 U$ F$ R/ Q regrow-grass Z2 f" d' x- V G$ ?: N
do-plots' @3 r# }( ]* v9 o/ B% H
end- s3 f8 I! ?( O" s. c5 v
to move-turtles, {$ A0 L8 a" V v. \- n
ask turtles [, w4 a4 R( j8 C( _ C" l) c
right random 3607 Q$ y' \2 N( `. N# {! ]
forward 17 F0 |7 L5 T+ Q) M0 z5 V" W; ]
set energy energy - 10 g' ]; i5 y( [# U
]
% _) {: q8 L7 L7 ]end, {; ^4 m# O5 t3 }" }3 ]
to setup-patches' O- Y: Q& p; n h" i$ S9 M
ask patches [ set pcolor green ]
+ J' u4 a5 m6 |! ~# hend( t2 o! X! K7 b
to setup-turtles
' a' C" N Q" g8 }5 o {3 t create-turtles 1004 }6 y& |# x- ~ @
ask turtles [ setxy random-xcor random-ycor ]
' @; {/ P: C, Eend/ c; s0 D- ^. x( e7 v3 I. B
to eat-grass
& ?! m0 u7 f5 V# P- q ask turtles [
2 L- s: K- {) {& @+ _$ J" Z: [3 j6 S if pcolor = green [
$ F4 ]4 M9 C u! X, O; U, X. r) s set pcolor black
1 L# V' u6 ^, m9 n( C set energy (energy + 10)- L" G2 M Y" \# r
]
- ]' ]8 W& l, i# N. \1 O5 s4 u ifelse show-energy?
7 e; S$ t, e- I2 I+ B6 X8 ^ [ set label energy ]
: H/ r7 m7 P$ R3 I1 Y7 Q8 @8 o- ` [ set label "" ]% w% D5 x- Z3 Z# @# j l# T1 K
]$ |8 F W% S- }9 Z
end
8 [0 s/ \8 O8 }" v/ `to reproduce
# i% A) M& v1 L" i* J: u ask turtles [
& k+ W# r9 d) {; M if energy > 50 [- q7 N9 n* s6 r' t9 z
set energy energy - 505 Y/ C( M% T# s3 g1 N4 S; O* C8 {
hatch 1 [ set energy 50 ]/ S# }! }5 d; e' Z0 Y, C
]
# \6 d+ {# R2 ^5 n. D# y" Q3 d3 d ]7 P1 `6 U K; S! m/ d
end
& d' J+ f$ _0 G1 o3 Q" u2 @. T; _* zto check-death
$ X0 f6 b$ |+ Y- a, y# f$ v& y" w ask turtles [
; w2 @- n* b8 c& j if energy <= 0 [ die ]; i% K) ^3 o& t0 k* J) o5 a
]$ G( g$ Y) I% J8 U d
end
& a* Q. n, P' b4 p4 ?to regrow-grass2 b0 I: B7 U8 ^! D4 L
ask patches [
# w D0 e: x3 E if random 100 < 3 [ set pcolor green ]' H/ |8 O4 F5 d" c
]
" K# h/ C$ A% l7 a& f: Y- @end
! J6 }8 ?* f* M! W1 i* sto do-plots
# J4 \% V1 h6 @" U S set-current-plot "Totals"
0 n8 `( P7 ~9 c* v' x' Z+ c# [ set-current-plot-pen "turtles"; W. e$ H+ Q) P% Q& X
plot count turtles" ]2 X4 |1 p7 c4 _) v- k, g
set-current-plot-pen "grass"% V0 M! I2 K; U
plot count patches with [pcolor = green]; b, j9 S2 v7 B1 @! Q
end/ l2 n8 D, E- N9 P' L/ Q
可是运行时提示no such plot: "Totals"
0 c, ~2 S3 f8 ?error while observer running SET-CURRENT-PLOT/ V4 m. \- Z* I0 Y
called by procedure DO-PLOTS3 Z- G" L" b6 }
called by procedure SETUP
. A1 x0 T* I" z2 c9 q) P( L# H8 o called by 按钮 'setup'
6 ?4 S/ `6 I5 }$ @& {求大神解答啊 |