我编的程序如下turtles-own [energy]
8 S0 a& Q. G2 n3 \! Dto setup) H' q) A) I6 u$ a, x/ J9 _
clear-all7 T* d, Q8 R8 q8 C
setup-patches4 ]1 x O2 ]5 ]
create-turtles 1002 X, I' K5 M3 s8 m
do-plots; F& ~# i& R, p; h. {
ask turtles [ setxy random-xcor random-ycor ]( E4 v( g5 F4 {
end
* R0 f5 k! C. z* \. ~to go5 I* h* `4 J7 b, h
move-turtles5 I% S' R/ G% U* @- Z
eat-grass. d, W8 h3 R( }! M T) s
reproduce
& T* F( O6 p1 z% U1 J0 f6 w3 ~ check-death
3 w9 s( i8 p) x- A8 y( D regrow-grass
# P/ }: A: n- M1 d9 |+ F6 q. u do-plots
: m6 z0 s1 w$ `end
' v l3 n" B# B& g6 O- D" E V# Uto move-turtles$ H7 Q i5 g0 @2 D
ask turtles [+ u9 B2 O. T4 D+ f# Q
right random 360
# t$ l: G( w, A/ u( C( f forward 1
: T- @. K s# o! I R set energy energy - 1' A' u- l0 ]' P _% F( a
]
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" D0 ]4 p1 R: b6 d' O$ [5 I8 }to setup-patches
0 Y3 S1 b! W0 q. X+ x5 o. Y ask patches [ set pcolor green ]
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to setup-turtles
& T' f2 E( k/ F/ h" V' z! A. Q! O create-turtles 1000 Z) `% H" f* `% i6 q* `% i0 w
ask turtles [ setxy random-xcor random-ycor ]+ q4 K+ Z) x" ]: @
end
; F% M/ y, V/ jto eat-grass7 {' w. F" G0 a% V
ask turtles [
* }- X F) ] I; x+ O( D if pcolor = green [1 D7 r3 K u- _ p/ k
set pcolor black4 w' w0 R- I" l2 r7 F( h3 D
set energy (energy + 10)$ K5 ?4 ]' @0 a/ g: W$ T
]1 y- g: O% w R9 N2 \; h
ifelse show-energy?
5 R8 y8 c+ ^% {, ] [ set label energy ]
8 S; P* m9 r% v3 {3 \% O& @$ x [ set label "" ]
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end" W$ l- K6 J. q* ^% Y9 N
to reproduce
) R. t6 C& U, f! S" S4 V7 l6 b6 a ask turtles [5 q$ T9 z* |; @, g
if energy > 50 [
5 C6 @, f. U3 S: u5 C set energy energy - 50
4 d/ w5 H# H+ ^ hatch 1 [ set energy 50 ]- x/ o. n: ^1 _! z) S
]
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0 q( p1 e8 u$ F3 t/ {end
- _! U0 ~' U0 k, e, Dto check-death3 }1 X% v% U# y4 I! M- [
ask turtles [" A; D9 U$ K" M) X9 b- ~
if energy <= 0 [ die ]6 X- C+ a) c+ ~% w) P# z
]- ]+ V! G+ I& V# I9 ?
end3 X% g3 Z/ K2 ]
to regrow-grass
- V" _ q, H& \2 F ask patches [) j' `3 [7 X. I7 ^, t" z( O
if random 100 < 3 [ set pcolor green ]
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end
' a+ `1 j' {! c" [; sto do-plots4 A& g8 G# K5 k& V# n% a# x+ z; O1 p
set-current-plot "Totals"$ P. n! B& j* l$ S& V
set-current-plot-pen "turtles": F8 ?5 i7 r: i3 T+ Z
plot count turtles1 O9 X, k8 S0 r) Q$ ]
set-current-plot-pen "grass"' J& G9 j5 i: E c- k2 p
plot count patches with [pcolor = green]' f. X* e ?9 N( A2 w% V
end
0 k3 D1 F! p2 p% W% ^可是运行时提示no such plot: "Totals"
. j. }7 N U' T: |error while observer running SET-CURRENT-PLOT
$ a% E0 p1 F P3 U called by procedure DO-PLOTS
( ^4 w! f( t- c: W# H9 @ called by procedure SETUP
4 \5 k9 N4 G$ D8 ~ Z called by 按钮 'setup'4 D4 P) X9 r# B$ a; ?5 }. X5 _
求大神解答啊 |