我编的程序如下turtles-own [energy]3 E! B8 J) }) J! o5 m7 F
to setup
: \! U/ {8 k! D clear-all
$ q3 J8 P' r! Y setup-patches0 _. m' j% d' `4 v( Z5 d# {
create-turtles 100
& G. y3 w+ }' R1 g) @ do-plots i1 q% f& p) H0 j4 l4 \ X
ask turtles [ setxy random-xcor random-ycor ]
D+ v% T' v) u8 _5 \5 [end( O+ E6 C1 R; M z1 r
to go. e R- ?, n" x8 M9 Z1 {- ]1 U' W2 `
move-turtles
1 i7 z- X: L3 d- i! [3 } eat-grass) P2 j f. z `' f2 n
reproduce
3 _' S) j7 S2 N" g c check-death
6 W$ m+ N1 I- y9 G6 N" E) @: g regrow-grass0 e9 }( u) S3 L+ }
do-plots
& O0 Z: R8 r# K* [$ F& V0 lend' z1 |. N; P3 a1 N7 w: h
to move-turtles
# l& u6 m. ?7 M1 H ask turtles [
: Z q! \3 z, l ` right random 360, u6 |# u' m& F) [& t0 e# i
forward 1
! Z2 v# q2 b$ P2 s, M4 h. E2 e' z q set energy energy - 1
8 r) a! e, Y+ {& V- P ]
?6 W0 O" S6 b- D+ hend& K: m. ~: f) K. f s( L8 {: N
to setup-patches) m& J8 H6 m/ Q/ {( g: O; p
ask patches [ set pcolor green ]4 O0 b( h7 ]6 ^! n E
end: k* G4 z1 j* }, D! h& A
to setup-turtles
+ f* }; D1 k4 k create-turtles 100
Q% m1 ~; X/ c/ g# C5 G. _$ J7 l ask turtles [ setxy random-xcor random-ycor ]) c) \, T+ C; X( Y* c
end* w) [ d3 h5 F. b* a8 Y
to eat-grass
$ {" t$ Z+ l/ B5 E, N4 p; ~3 i ask turtles [
) E9 } v( @# {5 I, `% X if pcolor = green [
0 ~3 b% c. P. ]3 F+ c set pcolor black0 k/ o. u2 X z: A0 E: |& {( u% f
set energy (energy + 10)+ S8 ^8 s5 h* I c
]/ `+ h6 T) x. ]/ S; i' C% G
ifelse show-energy?
' F$ d3 g2 w; A9 d% A4 ^ [ set label energy ]# x& I' S! P! Z2 }5 |
[ set label "" ]
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end( V" g4 M( q, X- `& @
to reproduce; b# |( @$ X' b8 M6 t$ K
ask turtles [# d" [5 p! x5 Z
if energy > 50 [
' `5 u4 U. e0 l: A9 v set energy energy - 50
7 W- E- E; m( l% j& p! t' N hatch 1 [ set energy 50 ]
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]* R j" F$ I. m2 j. ?
end4 _% n1 H. k9 O( m
to check-death
& z$ x" Q3 v% h: h% c# C5 q ask turtles [
, b$ N* k/ w5 B& M3 h if energy <= 0 [ die ]: R6 g: w. x( j% A6 D( m
]# e! ]. U7 j- L. B" s6 p& }1 m" n
end l) b& Q: V2 Z% ^5 W
to regrow-grass
. u9 n0 s I+ t& T# T3 R2 `5 x ask patches [
: M, {) U' `8 Q2 e if random 100 < 3 [ set pcolor green ]
6 x6 B. j- x4 d3 n. i ]- I' N7 C& j2 r( {
end* v# A( O6 F& b( y4 T3 s0 {6 u+ v0 ^
to do-plots/ M, O8 a4 {2 J% ~: j, b/ I% |
set-current-plot "Totals"
$ e6 K- R. U$ ~7 ?( ` set-current-plot-pen "turtles"4 R) i6 B6 u Z2 f' ]
plot count turtles; x& [* W9 \) b. [
set-current-plot-pen "grass"
+ Z7 W" B& p: O7 b% `5 I* ? plot count patches with [pcolor = green]
0 s0 G, R8 A3 y% Gend2 ?2 [6 l3 p6 V+ T& Z5 ~2 e# J
可是运行时提示no such plot: "Totals"# F3 j( T; h6 A i0 m( O
error while observer running SET-CURRENT-PLOT
1 U# [8 I% U0 _8 i ~( c called by procedure DO-PLOTS
8 n9 S0 O9 H, ]# j called by procedure SETUP5 o3 e( N: {, Z; `: G8 K
called by 按钮 'setup'7 {% Q/ M/ r1 F, u% |2 h1 f2 f( L
求大神解答啊 |