我编的程序如下turtles-own [energy]
6 l( e/ |2 G$ ]* S3 S& L# \& Vto setup
3 O% I$ J; i; L3 D clear-all
' q0 D: J3 D9 V8 ?$ t7 Y setup-patches
& F) j) e1 R4 a* j create-turtles 100
3 s! v, V5 O/ D2 {9 S4 J( H& \ do-plots
' f# C+ M/ d3 e3 V) Q) k5 t ask turtles [ setxy random-xcor random-ycor ]
! N1 P& ^5 @( Z- j. N) Z w6 ^( E# t+ Qend
+ ?: g+ v' c6 U' U# H3 wto go6 F5 j$ }3 O2 D7 {
move-turtles1 N% p1 M; H# p9 W
eat-grass
: o8 d0 m6 U! _9 H5 V reproduce
. c" D* g9 W" J3 G0 ?7 P check-death1 r1 G: p9 W, ?/ R m! _7 U
regrow-grass5 p) u# x8 d; {2 y0 u t
do-plots) d# K+ V" {; l/ u) ~1 Z
end
* {, T& f( b! Q& B( q* U! @+ lto move-turtles/ [. A, U, v3 _* k+ e
ask turtles [4 |5 d8 W- d) V9 c" H
right random 360
" o' H; j9 _$ k: r forward 1
( e4 k$ Q! Q' q set energy energy - 1
: L) D5 G) J# O* \2 F ]
. r4 ?3 \1 M( Q3 Jend
6 p, Q6 u, u# {' v6 D0 O. tto setup-patches p: _- t9 C5 n0 x" N
ask patches [ set pcolor green ]
& e2 O+ ?5 }% y( H# Aend; T& W1 I" n, F+ D: D& f
to setup-turtles8 {$ l: _' l! A- S: p
create-turtles 100
( ?6 |. D; v' V) ? [8 G ask turtles [ setxy random-xcor random-ycor ] `/ e ]( N9 l* ?( D
end
6 Z% \5 k' U& R# k/ D. Xto eat-grass" P) \6 T7 o/ `' |5 j2 L( F3 P |
ask turtles [; ^' _; j) Q. }1 K! _7 d: D
if pcolor = green [
' h# \7 V( j/ f5 ` set pcolor black4 L8 R" X# l& e0 [
set energy (energy + 10)
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$ ~: U, ?8 Q1 [ ifelse show-energy?9 [) E9 r9 n" E6 A5 U
[ set label energy ]
, s) U) Y; c3 F0 r# f$ x0 o1 \ [ set label "" ]
2 @! P# I1 Q# q/ y) T$ ] ]
8 I. L9 D; e* [0 m5 x. C2 A# Send& E% E6 P G7 g8 c i( I
to reproduce
) G- Q9 O" u. E9 Q! q5 O$ m ask turtles [
1 ?3 U$ [. N; z if energy > 50 [
0 R% O6 o0 ?) F; [4 U9 v3 x set energy energy - 50! Y7 ?/ | Q* M+ A4 |7 G% I
hatch 1 [ set energy 50 ]
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]' A) H0 T" J7 w4 R5 G
end/ A' E& {! K h" M) `/ _3 p
to check-death
4 J' N- v" l ^+ i% q |6 V: c! Y ask turtles [
: n/ q5 K6 ?1 j if energy <= 0 [ die ]
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end
" M( q# j, Y! } Y, V. o v5 H: lto regrow-grass
) v4 L* W. h# T) Q% Z0 t ask patches [5 B8 H3 J" o+ h1 _% z B
if random 100 < 3 [ set pcolor green ]
3 \2 L# G3 A( D ]
' F# s% B% u4 Xend
6 y+ j3 H6 Y" _to do-plots
6 _ {5 l' h: |. N: p set-current-plot "Totals"* y7 E- \7 y/ |( `. v3 k
set-current-plot-pen "turtles"1 P4 @9 j3 ?( Y- L
plot count turtles
" i `1 J4 e/ {2 T, ? set-current-plot-pen "grass"
. U& T, J+ i) W plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
$ ^* Y6 a4 Y8 r( Z5 Ferror while observer running SET-CURRENT-PLOT
. C$ k: V: q; _& ~& X3 P$ G called by procedure DO-PLOTS
7 W& w& b% V3 ~4 m; u called by procedure SETUP7 z0 ~+ p( {- I' z+ U9 z
called by 按钮 'setup'
5 Z8 D5 \9 Z- B5 d; L `求大神解答啊 |