我编的程序如下turtles-own [energy]
4 X3 _" h5 w Mto setup! ]$ Y7 Q& E+ _$ }9 U: v
clear-all
7 ^# `) j1 C: p/ D! q4 |8 x1 K' i0 V setup-patches9 _) n' b3 W. m. P. s0 ?: a
create-turtles 100' v- X" W9 c7 R% I. d% C
do-plots8 \1 X9 m+ @% d5 h( `
ask turtles [ setxy random-xcor random-ycor ]
8 U6 u3 k8 ^4 t2 rend q. ?% ]9 H3 ], h4 g! _
to go$ W9 z' u; D, ~6 o& K0 Y
move-turtles6 A2 f' f1 Z) J. s/ j0 }5 u o. P
eat-grass
4 K' x# h, i( z0 Q- N8 n reproduce
6 G2 d( e7 L: S3 u1 a9 M0 f# o check-death
8 p" I. F& [7 [0 n' D- ?/ t# n regrow-grass
3 k; b- F2 o4 |, i) x do-plots
* i9 d) w0 Y8 W6 i- H# vend
: P. V6 b* R4 k" zto move-turtles6 \0 W4 [+ r x0 }( O
ask turtles [4 S4 I4 z V2 ~
right random 360
8 o" v, n" P+ y) @0 ?6 A' E0 v forward 1
3 h, \5 I. d& `6 H7 p0 c) I set energy energy - 1% p& [2 E# {1 b' j1 i9 O
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end+ ~( Z: e7 C# G( K7 [. P
to setup-patches+ P0 {0 ?& e, K' h3 Q
ask patches [ set pcolor green ]8 p: t$ G( ~3 w) u0 k( v" E
end
6 L/ l0 B6 Q7 G8 s4 ^3 ato setup-turtles/ O8 K+ o6 N4 {# \# f, C @2 N% M
create-turtles 100
& A. |8 p; Z9 q0 a0 u0 H# e+ U ask turtles [ setxy random-xcor random-ycor ]
! L5 ?& K: N9 z" F3 c9 uend
! \3 W/ Z. _8 U+ d2 {# Oto eat-grass
) q9 {' G, Q) p( Z' C ask turtles [; H5 |# J l) ~. r3 v7 X
if pcolor = green [
5 N* F% s* C. @# {' E) @( E" [ set pcolor black# S$ g# A: s/ a! t! M7 x3 p
set energy (energy + 10)
$ I! R/ r" T* W2 E2 b' A% V ]
3 d& v1 e Z2 W' |8 d0 a! D ifelse show-energy?8 D( A; f! i5 M0 m9 ~% O
[ set label energy ]
, l% x* B5 q' j/ U3 T [ set label "" ]
g+ r$ E; p6 z3 L7 u* L' v6 W ]
0 Q9 P! I, A. y& L+ q: }) H6 [& iend
9 y* @+ ~. I/ M$ L8 Nto reproduce9 s* B/ N/ @2 u. t1 c4 C5 y
ask turtles [
+ t/ g4 F+ v. ?8 j5 {& v) E if energy > 50 [
8 a3 E( B4 B- n/ ?" D+ o' ? set energy energy - 50/ r4 f6 X* p- g6 \, w
hatch 1 [ set energy 50 ]
x( d& x; Y6 ^5 u! N ]
7 ]4 l5 u, }% [ ]
# S0 W" G. p( z" e( mend
7 M1 }3 \- [9 |2 A6 ?. Eto check-death
# D | r' i, y5 h ask turtles [
. U0 z4 O8 C! U% A8 g! X if energy <= 0 [ die ]; c# J; X) O9 O8 m7 Q
] Q* }0 H2 V- F( F6 I' S3 E9 _
end$ J0 ~2 T5 B. o0 z; U! |" J q" C) }) {
to regrow-grass3 H+ V5 u) f( O) o6 \% L& n: {
ask patches [
( K! f. [ r" N: [8 ^6 b1 K if random 100 < 3 [ set pcolor green ]2 Z8 e; W! N1 [) C
]
: ^, v2 m3 y' B, r |end" p8 J! k4 L4 t g) x7 C! W
to do-plots4 r9 M$ L9 p0 J6 c6 \
set-current-plot "Totals"+ q% s! C1 A2 {" H
set-current-plot-pen "turtles"
) S7 ]+ }/ o- Y. C- P5 b plot count turtles
. {2 T0 m$ i. Y% u. R set-current-plot-pen "grass"
. \8 y$ U7 N. M4 `: D- k plot count patches with [pcolor = green]1 p! Z3 r3 n1 i
end. G0 r7 [& P0 f/ s2 Y' [+ L' h8 w
可是运行时提示no such plot: "Totals"8 l0 c' D. O, p. T7 V5 b
error while observer running SET-CURRENT-PLOT3 c2 j+ u' J- E$ [/ _
called by procedure DO-PLOTS+ M. T3 I& r* A3 N% b( d+ P
called by procedure SETUP
- |7 Z" _- _7 N% r6 z( s/ v# h& T% H* \ called by 按钮 'setup'9 B! N- r$ K1 G% C6 ]
求大神解答啊 |