我编的程序如下turtles-own [energy]
1 V" s4 J5 k7 m- x7 R, E7 h$ Pto setup" A7 }- ?0 U3 R/ R
clear-all6 ?5 q7 @% _# k# }0 W
setup-patches
: s/ B3 p" n* h; `. Z% N- R create-turtles 100# ?6 q" S4 j+ }# z6 v6 ~0 }$ D
do-plots# X& M7 K: J# P+ O1 e t0 x
ask turtles [ setxy random-xcor random-ycor ]. q& V3 g& k; K5 T5 Y B4 Y
end) ]0 p0 o/ l: _# o* K4 P
to go
- B8 C& p! z Y+ t* D1 T# E2 }2 Y move-turtles$ t) V, w/ }" Z4 n) E2 G
eat-grass1 u6 L, a1 x; c* Y
reproduce
/ Z) x1 e6 o+ N* u* P! V check-death/ Q% F. G( q; a/ v. \* t% |3 @
regrow-grass
2 Y! D% {2 w9 T, L3 a% C do-plots
_( [4 u' r' Fend) I5 C% F. s) m7 V$ {/ i* S
to move-turtles
# q$ ^& }' F6 u) V& o; O* R ask turtles [7 N6 z- q. R9 f/ J
right random 360
/ d8 X4 C% o4 d' }# ` forward 1' y5 U2 D# M% [) j/ K; T
set energy energy - 15 S/ b6 |0 @3 l! t7 B A9 V. l1 e6 Z
]
2 l2 q( q8 ^. o9 P1 r1 W4 mend
' g E4 N! P% U5 C- jto setup-patches
3 `" l: [* c" \ ask patches [ set pcolor green ]
/ ?) ^7 H' n- oend
( R" j* O1 Q1 }! i9 Mto setup-turtles, d$ n3 V0 S9 r. N. B$ O
create-turtles 100
0 K* {: R1 h5 w1 S3 b/ j ask turtles [ setxy random-xcor random-ycor ]
) X$ [# @, ^3 m/ P. u+ E9 iend
! ^3 L0 v ?( A5 {: Kto eat-grass
& X) M8 p( b( e% @$ g& E ask turtles [1 Y3 X q: J. c5 m5 [$ z
if pcolor = green [
6 |" q3 p3 l, u' f" T. M set pcolor black% p6 T1 L* c3 D5 D: Y
set energy (energy + 10)
# Q" S$ M5 O) y; S x: f ]
4 e: p: ~ @* M! a6 v; O ifelse show-energy?
7 Z2 ~; Q7 D6 T) x. ?2 q [ set label energy ]
- S4 Q/ n7 h7 M# n& i, Z9 C; b [ set label "" ]4 \! Z- V' d; e0 s
]( k) X6 p( I5 X' U9 l1 z9 ^
end+ y/ k" K( V; |' L- L5 v1 ?
to reproduce7 q) X0 ~* r5 G. c6 ~. {
ask turtles [
0 j+ @& g0 U' K0 a( n if energy > 50 [
, P, x% \0 H/ _2 _2 j0 D Z set energy energy - 50
[+ ^" Q& x- w3 Y' B* Q& p' W9 k! @ hatch 1 [ set energy 50 ]
7 \3 P! N7 o' G+ l' ^ ]
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end4 w. B1 \. K7 {8 c7 J
to check-death# [& y; M: E% j( ~! T0 c+ I
ask turtles [
: m" N `3 G) o if energy <= 0 [ die ]
, {" H( R; J, \2 T2 o ]) \( K) j- b: a# |- u: Y) B
end" k0 A- T; J& {4 y' h2 T
to regrow-grass# \! p d3 _0 K0 | c/ G
ask patches [
; z' D( D8 Z) r: j$ c: K$ m if random 100 < 3 [ set pcolor green ]
1 A- J5 ]3 H |1 h ]$ b5 L$ Z7 f7 P( A7 n: B9 N5 m
end9 {4 `9 B; L; o# R
to do-plots/ c8 \, o0 M, A, \. o. z/ {2 O
set-current-plot "Totals"8 D6 Y: {, |4 f4 G+ }8 W
set-current-plot-pen "turtles"
6 R3 ]% s8 t. s& \ plot count turtles# r6 w- O, v6 P" W) p0 p) A& k. C: |
set-current-plot-pen "grass"
4 U# t4 Y5 e3 O plot count patches with [pcolor = green]! {" q- k5 _) i9 ~+ C: R9 D
end
) j" s/ Y/ t8 M$ \5 R4 l2 i可是运行时提示no such plot: "Totals". d* T" J6 \( h. K: a, F# [
error while observer running SET-CURRENT-PLOT
, ]3 P& ]: s. S6 y, Z9 r& N called by procedure DO-PLOTS) U( ^" r f3 a5 ? Y
called by procedure SETUP
9 C" G& o7 Y1 J$ U# Y# ~* M called by 按钮 'setup'
. N" m8 M7 s+ h! A+ x% m/ Z7 [6 B求大神解答啊 |