我编的程序如下turtles-own [energy]! @) W, T$ H {
to setup
_, y. Z! G# m r0 K clear-all0 @; i; R! |: w* q! u
setup-patches
4 O1 y* X1 }- X( ?) K8 r( Z/ l create-turtles 1000 i; i% f6 h$ ?( E: [6 o# m
do-plots
! j b ?9 [+ a j ask turtles [ setxy random-xcor random-ycor ]
9 T8 \) {- b& C. vend. E3 F) \& E- } q
to go
' W+ ?$ s3 S; d$ a' M move-turtles
: X6 a# o( Q6 K F( ]. q' j eat-grass5 ~1 w' @5 N! e- }- A t
reproduce
* b1 O5 ^$ J" u3 @2 M. g# h* p9 Z( Q check-death
. f; V: t9 ?- g: f( x9 h3 Q regrow-grass6 X, B) ~# r" Y& \0 A5 e l( |
do-plots& v6 g+ T# u- h4 g* d: ~
end
! R9 c) A' T$ D- R3 Bto move-turtles
6 b8 X* h% @( U$ o2 n ask turtles [
7 {* ^ u) N% Y1 k8 d right random 360
6 ~" v/ Q* h1 K forward 1
3 {! f1 F* i9 x; E set energy energy - 1( Z# P' k2 ~6 V' S( c$ w5 L
]
0 [5 ~" O) O) N' {! D% I& |end
% M. H# `5 m4 v# |8 sto setup-patches- b/ B) y4 H+ y
ask patches [ set pcolor green ], X' D1 |' Y+ L
end
5 f) l6 q- k% m0 Cto setup-turtles
" C5 s0 a" `; G$ e# a create-turtles 1002 ~! X" c E5 a& r4 Y% q3 U
ask turtles [ setxy random-xcor random-ycor ]
7 c3 k0 A! d: q+ j6 V2 Dend2 h# ^- l2 ^1 V |9 k
to eat-grass' l; I9 F$ g' d0 P; l
ask turtles [& b `2 w, q2 a4 @. t& N- i
if pcolor = green [
1 C. n6 |% ^+ t set pcolor black
- J- U/ g5 b6 L% j4 [ set energy (energy + 10)
3 Q# V ^* i0 n; u/ u f) O s' A" g ]% g, n! O5 u% M% ?; E
ifelse show-energy?
( i- \+ [& p" _/ T f- ~( S [ set label energy ]
& x& K5 i8 I4 b& B [ set label "" ]
# U) \( O5 _, _3 r ]
9 O) Y+ D2 D5 ?4 Y: o# e1 F' a- oend9 j# L1 O$ n! [* p1 S. c5 Z
to reproduce7 z# z/ ~2 n' |6 X7 f! c
ask turtles [. _ I# E# [9 ]# q' A) ^& `/ w
if energy > 50 [% g, j: E4 o9 W9 I$ U" d! y5 x
set energy energy - 50
, v3 _+ l1 B3 O! ` hatch 1 [ set energy 50 ] p5 X- X) l5 O: O2 f
]. z* D/ n! w2 ], C2 r* b
]
. @: F( Q9 ~- t8 q! C$ ^/ Vend
; y* M( u2 l5 y G5 D# j" V+ O) T) P' }to check-death
' }& K S: G9 J; E) w5 c. m) B% E: M ask turtles [
2 S1 ~7 G- ?% I1 y if energy <= 0 [ die ]
& |! @4 ]0 Z2 N, ] ]
) e5 N- M& y" u0 ?( s+ ~: K" }8 L: send
' g/ _+ Z, K' n0 h8 O5 V2 `3 Pto regrow-grass
) \! s" i* s S0 ^ ask patches [9 x' d0 l; N0 w; X# ?
if random 100 < 3 [ set pcolor green ]
: c" c3 H# R" T1 B1 S" A ]! m% R3 U* F6 b$ g" _
end
, V1 T+ y2 z/ c$ x* @$ Yto do-plots9 ^. K3 Z& \/ r
set-current-plot "Totals"
! ]6 R5 \" P0 _0 V. w1 q1 U* Q set-current-plot-pen "turtles"
& o: Q9 t# x, I& H# j plot count turtles
$ l y5 q0 H/ D4 _ set-current-plot-pen "grass"' e! e$ U$ {; A; Y/ t' e2 W
plot count patches with [pcolor = green]' c& M( H/ G$ @' `7 G& v& ?
end$ k- m/ Y/ D- P
可是运行时提示no such plot: "Totals": Y" ~4 b2 T# R6 e
error while observer running SET-CURRENT-PLOT7 @) t4 F; T0 [; g$ ]' K6 _
called by procedure DO-PLOTS
* r( c+ p# O- w) m% Z1 Q9 s called by procedure SETUP
/ ^8 p) K2 {4 r1 H called by 按钮 'setup'2 U8 ^! a7 B* R8 P7 c
求大神解答啊 |